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Eagles Nest BBS 8
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Eagles_Nest_Mac_Collection_Disc_8.TOAST
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Developer Tools⁄Additions
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TextPertDK#1
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MPW C Sources & Examples.image
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Example2
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Example2.c
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/*------------------------------------------------------------------------------
#
# CTA I+D Department
#
# TextPert reader engine use sample.
#
# This Sample is based upon the TESample sample provided with the MPW 3.2
# stuff.
#
# The TextPert reader engine parts of the code are well indicated in this
# sample.
#
#
#
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Next Part belongs to TESample sample.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/*------------------------------------------------------------------------------
#
# Apple Macintosh Developer Technical Support
#
# MultiFinder-Aware Simple TextEdit Sample Application
#
# TESample
#
# This file: TESample.c - C Source
#
# Copyright © 1989 Apple Computer, Inc.
# All rights reserved.
#
# Versions:
# 1.00 08/88
# 1.01 11/88
# 1.02 04/89 MPW 3.1
#
# Components:
# TESample.p April 1, 1989
# TESample.c April 1, 1989
# TESampleGlue.a April 1, 1989
# TESample.r April 1, 1989
# TESample.h April 1, 1989
# [P]TESample.make April 1, 1989
# [C]TESample.make April 1, 1989
#
# TESample is an example application that demonstrates how
# to initialize the commonly used toolbox managers, operate
# successfully under MultiFinder, handle desk accessories and
# create, grow, and zoom windows. The fundamental TextEdit
# toolbox calls and TextEdit autoscroll are demonstrated. It
# also shows how to create and maintain scrollbar controls.
#
# It does not by any means demonstrate all the techniques you
# need for a large application. In particular, Sample does not
# cover exception handling, multiple windows/documents,
# sophisticated memory management, printing, or undo. All of
# these are vital parts of a normal full-sized application.
#
# This application is an example of the form of a Macintosh
# application; it is NOT a template. It is NOT intended to be
# used as a foundation for the next world-class, best-selling,
# 600K application. A stick figure drawing of the human body may
# be a good example of the form for a painting, but that does not
# mean it should be used as the basis for the next Mona Lisa.
#
# We recommend that you review this program or Sample before
# beginning a new application. Sample is a simple app. which doesn’t
# use TextEdit or the Control Manager.
#
------------------------------------------------------------------------------*/
/* Segmentation strategy:
This program consists of three segments. Main contains most of the code,
including the MPW libraries, and the main program. Initialize contains
code that is only used once, during startup, and can be unloaded after the
program starts. %A5Init is automatically created by the Linker to initialize
globals for the MPW libraries and is unloaded right away. */
/* SetPort strategy:
Toolbox routines do not change the current port. In spite of this, in this
program we use a strategy of calling SetPort whenever we want to draw or
make calls which depend on the current port. This makes us less vulnerable
to bugs in other software which might alter the current port (such as the
bug (feature?) in many desk accessories which change the port on OpenDeskAcc).
Hopefully, this also makes the routines from this program more self-contained,
since they don't depend on the current port setting. */
/* Clipboard strategy:
This program does not maintain a private scrap. Whenever a cut, copy, or paste
occurs, we import/export from the public scrap to TextEdit's scrap right away,
using the TEToScrap and TEFromScrap routines. If we did use a private scrap,
the import/export would be in the activate/deactivate event and suspend/resume
event routines. */
/* A/UX is case sensitive, so use correct case for include file names */
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Next Lines have includes added for TextPert sample. Those lines are indicated.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
#include <values.h>
#include <types.h>
#include <quickdraw.h>
#include <fonts.h>
#include <events.h>
#include <controls.h>
#include <windows.h>
#include <menus.h>
#include <textedit.h>
#include <dialogs.h>
#include <desk.h>
#include <scrap.h>
#include <toolutils.h>
#include <memory.h>
#include <segload.h>
#include <files.h>
#include <osutils.h>
#include <osevents.h>
#include <diskinit.h>
#include <packages.h>
#include "Example2.h" /* bring in all the #defines for TESample */
#include <traps.h>
#include "Example2_TextPert.h"
/* End of TexPert sample lines */
/* A DocumentRecord contains the WindowRecord for one of our document windows,
as well as the TEHandle for the text we are editing. Other document fields
can be added to this record as needed. For a similar example, see how the
Window Manager and Dialog Manager add fields after the GrafPort. */
typedef struct {
WindowRecord docWindow;
TEHandle docTE;
ControlHandle docVScroll;
ControlHandle docHScroll;
ProcPtr docClik;
} DocumentRecord, *DocumentPeek;
/* The "g" prefix is used to emphasize that a variable is global. */
/* GMac is used to hold the result of a SysEnvirons call. This makes
it convenient for any routine to check the environment. It is
global information, anyway. */
SysEnvRec gMac; /* set up by Initialize */
/* GHasWaitNextEvent is set at startup, and tells whether the WaitNextEvent
trap is available. If it is false, we know that we must call GetNextEvent. */
Boolean gHasWaitNextEvent; /* set up by Initialize */
/* GInBackground is maintained by our OSEvent handling routines. Any part of
the program can check it to find out if it is currently in the background. */
Boolean gInBackground; /* maintained by Initialize and DoEvent */
/* GNumDocuments is used to keep track of how many open documents there are
at any time. It is maintained by the routines that open and close documents. */
short gNumDocuments; /* maintained by Initialize, DoNew, and DoCloseWindow */
/* Here are declarations for all of the C routines. In MPW 3.0 we can use
actual prototypes for parameter type checking. A/UX C does not grok
prototypes, so eliminate them under A/UX */
void AlertUser( short error );
void EventLoop( void );
void DoEvent( EventRecord *event );
void AdjustCursor( Point mouse, RgnHandle region );
void GetGlobalMouse( Point *mouse );
void DoGrowWindow( WindowPtr window, EventRecord *event );
void DoZoomWindow( WindowPtr window, short part );
void ResizeWindow( WindowPtr window );
void GetLocalUpdateRgn( WindowPtr window, RgnHandle localRgn );
void DoUpdate( WindowPtr window );
void DoDeactivate( WindowPtr window );
void DoActivate( WindowPtr window, Boolean becomingActive );
void DoContentClick( WindowPtr window, EventRecord *event );
void DoKeyDown( EventRecord *event );
unsigned long GetSleep( void );
void CommonAction( ControlHandle control, short *amount );
pascal void VActionProc( ControlHandle control, short part );
pascal void HActionProc( ControlHandle control, short part );
void DoIdle( void );
void DrawWindow( WindowPtr window );
void AdjustMenus( void );
void DoMenuCommand( long menuResult );
void DoNew( void );
Boolean DoCloseWindow( WindowPtr window );
void Terminate( void );
void Initialize( void );
void BigBadError( short error );
void GetTERect( WindowPtr window, Rect *teRect );
void AdjustViewRect( TEHandle docTE );
void AdjustTE( WindowPtr window );
void AdjustHV( Boolean isVert, ControlHandle control, TEHandle docTE,
Boolean canRedraw );
void AdjustScrollValues( WindowPtr window, Boolean canRedraw );
void AdjustScrollSizes( WindowPtr window );
void AdjustScrollbars( WindowPtr window, Boolean needsResize );
pascal void PascalClikLoop();
pascal ProcPtr GetOldClikLoop();
Boolean IsAppWindow( WindowPtr window );
Boolean IsDAWindow( WindowPtr window );
Boolean TrapAvailable( short tNumber, TrapType tType );
/* Define HiWrd and LoWrd macros for efficiency. */
#define HiWrd(aLong) (((aLong) >> 16) & 0xFFFF)
#define LoWrd(aLong) ((aLong) & 0xFFFF)
/* Define TopLeft and BotRight macros for convenience. Notice the implicit
dependency on the ordering of fields within a Rect */
#define TopLeft(aRect) (* (Point *) &(aRect).top)
#define BotRight(aRect) (* (Point *) &(aRect).bottom)
/* This routine is part of the MPW runtime library. This external
reference to it is done so that we can unload its segment, %A5Init. */
extern void _DataInit();
/* A reference to our assembly language routine that gets attached to the clikLoop
field of our TE record. */
extern pascal void AsmClikLoop();
#pragma segment Main
main()
{
UnloadSeg((Ptr) _DataInit); /* note that _DataInit must not be in Main! */
/* 1.01 - call to ForceEnvirons removed */
/* If you have stack requirements that differ from the default,
then you could use SetApplLimit to increase StackSpace at
this point, before calling MaxApplZone. */
/* Whe increase in 10K the StackSpace, so it will be 18K */
SetApplLimit((Ptr)((long)(GetApplLimit()) - 10240));
MaxApplZone(); /* expand the heap so code segments load at the top */
Initialize(); /* initialize the program */
UnloadSeg((Ptr) Initialize); /* note that Initialize must not be in Main! */
EventLoop(); /* call the main event loop */
}
/* Get events forever, and handle them by calling DoEvent.
Also call AdjustCursor each time through the loop. */
#pragma segment Main
void EventLoop()
{
RgnHandle cursorRgn;
Boolean gotEvent;
EventRecord event;
Point mouse;
cursorRgn = NewRgn(); /* we’ll pass WNE an empty region the 1st time thru */
do {
/* use WNE if it is available */
if ( gHasWaitNextEvent ) {
GetGlobalMouse(&mouse);
AdjustCursor(mouse, cursorRgn);
gotEvent = WaitNextEvent(everyEvent, &event, GetSleep(), cursorRgn);
}
else {
SystemTask();
gotEvent = GetNextEvent(everyEvent, &event);
}
if ( gotEvent ) {
/* make sure we have the right cursor before handling the event */
AdjustCursor(event.where, cursorRgn);
DoEvent(&event);
} else DoIdle();
/* If you are using modeless dialogs that have editText items,
you will want to call IsDialogEvent to give the caret a chance
to blink, even if WNE/GNE returned FALSE. However, check FrontWindow
for a non-NIL value before calling IsDialogEvent. */
} while ( true ); /* loop forever; we quit via ExitToShell */
} /*EventLoop*/
/* Do the right thing for an event. Determine what kind of event it is, and call
the appropriate routines. */
#pragma segment Main
void DoEvent(event)
EventRecord *event;
{
short part, err;
WindowPtr window;
char key;
Point aPoint;
switch ( event->what ) {
case nullEvent:
/* we idle for null/mouse moved events ands for events which aren’t
ours (see EventLoop) */
DoIdle();
break;
case mouseDown:
part = FindWindow(event->where, &window);
switch ( part ) {
case inMenuBar: /* process a mouse menu command (if any) */
AdjustMenus(); /* bring ’em up-to-date */
DoMenuCommand(MenuSelect(event->where));
break;
case inSysWindow: /* let the system handle the mouseDown */
SystemClick(event, window);
break;
case inContent:
if ( window != FrontWindow() ) {
SelectWindow(window);
/*DoEvent(event);*/ /* use this line for "do first click" */
} else
DoContentClick(window, event);
break;
case inDrag: /* pass screenBits.bounds to get all gDevices */
DragWindow(window, event->where, &qd.screenBits.bounds);
break;
case inGoAway:
if ( TrackGoAway(window, event->where) )
DoCloseWindow(window); /* we don’t care if the user cancelled */
break;
case inGrow:
DoGrowWindow(window, event);
break;
case inZoomIn:
case inZoomOut:
if ( TrackBox(window, event->where, part) )
DoZoomWindow(window, part);
break;
}
break;
case keyDown:
case autoKey: /* check for menukey equivalents */
key = event->message & charCodeMask;
if ( event->modifiers & cmdKey ) { /* Command key down */
if ( event->what == keyDown ) {
AdjustMenus(); /* enable/disable/check menu items properly */
DoMenuCommand(MenuKey(key));
}
} else
DoKeyDown(event);
break;
case activateEvt:
DoActivate((WindowPtr) event->message, (event->modifiers & activeFlag) != 0);
break;
case updateEvt:
DoUpdate((WindowPtr) event->message);
break;
/* 1.01 - It is not a bad idea to at least call DIBadMount in response
to a diskEvt, so that the user can format a floppy. */
case diskEvt:
if ( HiWord(event->message) != noErr ) {
SetPt(&aPoint, kDILeft, kDITop);
err = DIBadMount(aPoint, event->message);
}
break;
case kOSEvent:
/* 1.02 - must BitAND with 0x0FF to get only low byte */
switch ((event->message >> 24) & 0x0FF) { /* high byte of message */
case kMouseMovedMessage:
DoIdle(); /* mouse-moved is also an idle event */
break;
case kSuspendResumeMessage: /* suspend/resume is also an activate/deactivate */
gInBackground = (event->message & kResumeMask) == 0;
DoActivate(FrontWindow(), !gInBackground);
break;
}
break;
}
} /*DoEvent*/
/* Change the cursor's shape, depending on its position. This also calculates the region
where the current cursor resides (for WaitNextEvent). When the mouse moves outside of
this region, an event is generated. If there is more to the event than just
“the mouse moved”, we get called before the event is processed to make sure
the cursor is the right one. In any (ahem) event, this is called again before we
fall back into WNE. */
#pragma segment Main
void AdjustCursor(mouse,region)
Point mouse;
RgnHandle region;
{
WindowPtr window;
RgnHandle arrowRgn;
RgnHandle iBeamRgn;
Rect iBeamRect;
window = FrontWindow(); /* we only adjust the cursor when we are in front */
if ( (! gInBackground) && (! IsDAWindow(window)) ) {
/* calculate regions for different cursor shapes */
arrowRgn = NewRgn();
iBeamRgn = NewRgn();
/* start arrowRgn wide open */
SetRectRgn(arrowRgn, kExtremeNeg, kExtremeNeg, kExtremePos, kExtremePos);
/* calculate iBeamRgn */
if ( IsAppWindow(window) ) {
iBeamRect = (*((DocumentPeek) window)->docTE)->viewRect;
SetPort(window); /* make a global version of the viewRect */
LocalToGlobal(&TopLeft(iBeamRect));
LocalToGlobal(&BotRight(iBeamRect));
RectRgn(iBeamRgn, &iBeamRect);
/* we temporarily change the port’s origin to “globalfy” the visRgn */
SetOrigin(-window->portBits.bounds.left, -window->portBits.bounds.top);
SectRgn(iBeamRgn, window->visRgn, iBeamRgn);
SetOrigin(0, 0);
}
/* subtract other regions from arrowRgn */
DiffRgn(arrowRgn, iBeamRgn, arrowRgn);
/* change the cursor and the region parameter */
if ( PtInRgn(mouse, iBeamRgn) ) {
SetCursor(*GetCursor(iBeamCursor));
CopyRgn(iBeamRgn, region);
} else {
SetCursor(&qd.arrow);
CopyRgn(arrowRgn, region);
}
DisposeRgn(arrowRgn);
DisposeRgn(iBeamRgn);
}
} /*AdjustCursor*/
/* Get the global coordinates of the mouse. When you call OSEventAvail
it will return either a pending event or a null event. In either case,
the where field of the event record will contain the current position
of the mouse in global coordinates and the modifiers field will reflect
the current state of the modifiers. Another way to get the global
coordinates is to call GetMouse and LocalToGlobal, but that requires
being sure that thePort is set to a valid port. */
#pragma segment Main
void GetGlobalMouse(mouse)
Point *mouse;
{
EventRecord event;
OSEventAvail(kNoEvents, &event); /* we aren't interested in any events */
*mouse = event.where; /* just the mouse position */
} /*GetGlobalMouse*/
/* Called when a mouseDown occurs in the grow box of an active window. In
order to eliminate any 'flicker', we want to invalidate only what is
necessary. Since ResizeWindow invalidates the whole portRect, we save
the old TE viewRect, intersect it with the new TE viewRect, and
remove the result from the update region. However, we must make sure
that any old update region that might have been around gets put back. */
#pragma segment Main
void DoGrowWindow(window,event)
WindowPtr window;
EventRecord *event;
{
long growResult;
Rect tempRect;
RgnHandle tempRgn;
DocumentPeek doc;
tempRect = qd.screenBits.bounds; /* set up limiting values */
tempRect.left = kMinDocDim;
tempRect.top = kMinDocDim;
growResult = GrowWindow(window, event->where, &tempRect);
/* see if it really changed size */
if ( growResult != 0 ) {
doc = (DocumentPeek) window;
tempRect = (*doc->docTE)->viewRect; /* save old text box */
tempRgn = NewRgn();
GetLocalUpdateRgn(window, tempRgn); /* get localized update region */
SizeWindow(window, LoWrd(growResult), HiWrd(growResult), true);
ResizeWindow(window);
/* calculate & validate the region that hasn’t changed so it won’t get redrawn */
SectRect(&tempRect, &(*doc->docTE)->viewRect, &tempRect);
ValidRect(&tempRect); /* take it out of update */
InvalRgn(tempRgn); /* put back any prior update */
DisposeRgn(tempRgn);
}
} /* DoGrowWindow */
/* Called when a mouseClick occurs in the zoom box of an active window.
Everything has to get re-drawn here, so we don't mind that
ResizeWindow invalidates the whole portRect. */
#pragma segment Main
void DoZoomWindow(window,part)
WindowPtr window;
short part;
{
EraseRect(&window->portRect);
ZoomWindow(window, part, window == FrontWindow());
ResizeWindow(window);
} /* DoZoomWindow */
/* Called when the window has been resized to fix up the controls and content. */
#pragma segment Main
void ResizeWindow(window)
WindowPtr window;
{
AdjustScrollbars(window, true);
AdjustTE(window);
InvalRect(&window->portRect);
} /* ResizeWindow */
/* Returns the update region in local coordinates */
#pragma segment Main
void GetLocalUpdateRgn(window,localRgn)
WindowPtr window;
RgnHandle localRgn;
{
CopyRgn(((WindowPeek) window)->updateRgn, localRgn); /* save old update region */
OffsetRgn(localRgn, window->portBits.bounds.left, window->portBits.bounds.top);
} /* GetLocalUpdateRgn */
/* This is called when an update event is received for a window.
It calls DrawWindow to draw the contents of an application window.
As an efficiency measure that does not have to be followed, it
calls the drawing routine only if the visRgn is non-empty. This
will handle situations where calculations for drawing or drawing
itself is very time-consuming. */
#pragma segment Main
void DoUpdate(window)
WindowPtr window;
{
if ( IsAppWindow(window) ) {
BeginUpdate(window); /* this sets up the visRgn */
if ( ! EmptyRgn(window->visRgn) ) /* draw if updating needs to be done */
DrawWindow(window);
EndUpdate(window);
}
} /*DoUpdate*/
/* This is called when a window is activated or deactivated.
It calls TextEdit to deal with the selection. */
#pragma segment Main
void DoActivate(window, becomingActive)
WindowPtr window;
Boolean becomingActive;
{
RgnHandle tempRgn, clipRgn;
Rect growRect;
DocumentPeek doc;
if ( IsAppWindow(window) ) {
doc = (DocumentPeek) window;
if ( becomingActive ) {
/* since we don’t want TEActivate to draw a selection in an area where
we’re going to erase and redraw, we’ll clip out the update region
before calling it. */
tempRgn = NewRgn();
clipRgn = NewRgn();
GetLocalUpdateRgn(window, tempRgn); /* get localized update region */
GetClip(clipRgn);
DiffRgn(clipRgn, tempRgn, tempRgn); /* subtract updateRgn from clipRgn */
SetClip(tempRgn);
TEActivate(doc->docTE);
SetClip(clipRgn); /* restore the full-blown clipRgn */
DisposeRgn(tempRgn);
DisposeRgn(clipRgn);
/* the controls must be redrawn on activation: */
(*doc->docVScroll)->contrlVis = kControlVisible;
(*doc->docHScroll)->contrlVis = kControlVisible;
InvalRect(&(*doc->docVScroll)->contrlRect);
InvalRect(&(*doc->docHScroll)->contrlRect);
/* the growbox needs to be redrawn on activation: */
growRect = window->portRect;
/* adjust for the scrollbars */
growRect.top = growRect.bottom - kScrollbarAdjust;
growRect.left = growRect.right - kScrollbarAdjust;
InvalRect(&growRect);
}
else {
TEDeactivate(doc->docTE);
/* the controls must be hidden on deactivation: */
HideControl(doc->docVScroll);
HideControl(doc->docHScroll);
/* the growbox should be changed immediately on deactivation: */
DrawGrowIcon(window);
}
}
} /*DoActivate*/
/* This is called when a mouseDown occurs in the content of a window. */
#pragma segment Main
void DoContentClick(window,event)
WindowPtr window;
EventRecord *event;
{
Point mouse;
ControlHandle control;
short part, value;
Boolean shiftDown;
DocumentPeek doc;
Rect teRect;
if ( IsAppWindow(window) ) {
SetPort(window);
mouse = event->where; /* get the click position */
GlobalToLocal(&mouse);
doc = (DocumentPeek) window;
/* see if we are in the viewRect. if so, we won’t check the controls */
GetTERect(window, &teRect);
if ( PtInRect(mouse, &teRect) ) {
/* see if we need to extend the selection */
shiftDown = (event->modifiers & shiftKey) != 0; /* extend if Shift is down */
TEClick(mouse, shiftDown, doc->docTE);
} else {
part = FindControl(mouse, window, &control);
switch ( part ) {
case 0: /* do nothing for viewRect case */
break;
case inThumb:
value = GetCtlValue(control);
part = TrackControl(control, mouse, nil);
if ( part != 0 ) {
value -= GetCtlValue(control);
/* value now has CHANGE in value; if value changed, scroll */
if ( value != 0 )
if ( control == doc->docVScroll )
TEScroll(0, value * (*doc->docTE)->lineHeight, doc->docTE);
else
TEScroll(value, 0, doc->docTE);
}
break;
default: /* they clicked in an arrow, so track & scroll */
if ( control == doc->docVScroll )
value = TrackControl(control, mouse, (ProcPtr) VActionProc);
else
value = TrackControl(control, mouse, (ProcPtr) HActionProc);
break;
}
}
}
} /*DoContentClick*/
/* This is called for any keyDown or autoKey events, except when the
Command key is held down. It looks at the frontmost window to decide what
to do with the key typed. */
#pragma segment Main
void DoKeyDown(event)
EventRecord *event;
{
WindowPtr window;
char key;
TEHandle te;
window = FrontWindow();
if ( IsAppWindow(window) ) {
te = ((DocumentPeek) window)->docTE;
key = event->message & charCodeMask;
/* we have a char. for our window; see if we are still below TextEdit’s
limit for the number of characters (but deletes are always rad) */
if ( key == kDelChar ||
(*te)->teLength - ((*te)->selEnd - (*te)->selStart) + 1 <
kMaxTELength ) {
TEKey(key, te);
AdjustScrollbars(window, false);
AdjustTE(window);
} else
AlertUser(eExceedChar);
}
} /*DoKeyDown*/
/* Calculate a sleep value for WaitNextEvent. This takes into account the things
that DoIdle does with idle time. */
#pragma segment Main
unsigned long GetSleep()
{
long sleep;
WindowPtr window;
TEHandle te;
sleep = MAXLONG; /* default value for sleep */
if ( !gInBackground ) {
window = FrontWindow(); /* and the front window is ours... */
if ( IsAppWindow(window) ) {
te = ((DocumentPeek) (window))->docTE; /* and the selection is an insertion point... */
if ( (*te)->selStart == (*te)->selEnd )
sleep = GetCaretTime(); /* blink time for the insertion point */
}
}
return sleep;
} /*GetSleep*/
/* Common algorithm for pinning the value of a control. It returns the actual amount
the value of the control changed. Note the pinning is done for the sake of returning
the amount the control value changed. */
#pragma segment Main
void CommonAction(control,amount)
ControlHandle control;
short *amount;
{
short value, max;
value = GetCtlValue(control); /* get current value */
max = GetCtlMax(control); /* and maximum value */
*amount = value - *amount;
if ( *amount < 0 )
*amount = 0;
else if ( *amount > max )
*amount = max;
SetCtlValue(control, *amount);
*amount = value - *amount; /* calculate the real change */
} /* CommonAction */
/* Determines how much to change the value of the vertical scrollbar by and how
much to scroll the TE record. */
#pragma segment Main
pascal void VActionProc(control,part)
ControlHandle control;
short part;
{
short amount;
WindowPtr window;
TEPtr te;
if ( part != 0 ) { /* if it was actually in the control */
window = (*control)->contrlOwner;
te = *((DocumentPeek) window)->docTE;
switch ( part ) {
case inUpButton:
case inDownButton: /* one line */
amount = 1;
break;
case inPageUp: /* one page */
case inPageDown:
amount = (te->viewRect.bottom - te->viewRect.top) / te->lineHeight;
break;
}
if ( (part == inDownButton) || (part == inPageDown) )
amount = -amount; /* reverse direction for a downer */
CommonAction(control, &amount);
if ( amount != 0 )
TEScroll(0, amount * te->lineHeight, ((DocumentPeek) window)->docTE);
}
} /* VActionProc */
/* Determines how much to change the value of the horizontal scrollbar by and how
much to scroll the TE record. */
#pragma segment Main
pascal void HActionProc(control,part)
ControlHandle control;
short part;
{
short amount;
WindowPtr window;
TEPtr te;
if ( part != 0 ) {
window = (*control)->contrlOwner;
te = *((DocumentPeek) window)->docTE;
switch ( part ) {
case inUpButton:
case inDownButton: /* a few pixels */
amount = kButtonScroll;
break;
case inPageUp: /* a page */
case inPageDown:
amount = te->viewRect.right - te->viewRect.left;
break;
}
if ( (part == inDownButton) || (part == inPageDown) )
amount = -amount; /* reverse direction */
CommonAction(control, &amount);
if ( amount != 0 )
TEScroll(amount, 0, ((DocumentPeek) window)->docTE);
}
} /* VActionProc */
/* This is called whenever we get a null event et al.
It takes care of necessary periodic actions. For this program, it calls TEIdle. */
#pragma segment Main
void DoIdle()
{
WindowPtr window;
window = FrontWindow();
if ( IsAppWindow(window) )
TEIdle(((DocumentPeek) window)->docTE);
} /*DoIdle*/
/* Draw the contents of an application window. */
#pragma segment Main
void DrawWindow(window)
WindowPtr window;
{
SetPort(window);
EraseRect(&window->portRect);
DrawControls(window);
DrawGrowIcon(window);
TEUpdate(&window->portRect, ((DocumentPeek) window)->docTE);
} /*DrawWindow*/
/* Enable and disable menus based on the current state.
The user can only select enabled menu items. We set up all the menu items
before calling MenuSelect or MenuKey, since these are the only times that
a menu item can be selected. Note that MenuSelect is also the only time
the user will see menu items. This approach to deciding what enable/
disable state a menu item has the advantage of concentrating all
the decision-making in one routine, as opposed to being spread throughout
the application. Other application designs may take a different approach
that may or may not be as valid. */
#pragma segment Main
void AdjustMenus()
{
WindowPtr window;
MenuHandle menu;
long offset;
Boolean undo;
Boolean cutCopyClear;
Boolean paste;
TEHandle te;
window = FrontWindow();
menu = GetMHandle(mFile);
if ( gNumDocuments < kMaxOpenDocuments )
EnableItem(menu, iNew); /* New is enabled when we can open more documents */
else
DisableItem(menu, iNew);
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Next Part has been added for TextPert reader sample.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
if (hLO) /* if there is any layout it can be saved */
EnableItem(Menu_TextPert__DTK, MItem_Save_Layout);
else
DisableItem(Menu_TextPert__DTK, MItem_Save_Layout);
/* We can read if there is any layout and we can have
any document more. */
if ((hLO) && ( gNumDocuments < kMaxOpenDocuments ))
EnableItem(Menu_TextPert__DTK, MItem_Read_Image);
else
DisableItem(Menu_TextPert__DTK, MItem_Read_Image);
if (hIM) /* We can do analyzepage if there is any. */
EnableItem(Menu_TextPert__DTK, MItem_Analize_Page);
else
DisableItem(Menu_TextPert__DTK, MItem_Analize_Page);
if ( window != nil ) /* Close is enabled when there is a window to close */
EnableItem(menu, iClose);
else
DisableItem(menu, iClose);
menu = GetMHandle(mEdit);
undo = false;
cutCopyClear = false;
paste = false;
if ( IsDAWindow(window) ) {
undo = true; /* all editing is enabled for DA windows */
cutCopyClear = true;
paste = true;
} else if ( IsAppWindow(window) ) {
te = ((DocumentPeek) window)->docTE;
if ( (*te)->selStart < (*te)->selEnd )
cutCopyClear = true;
/* Cut, Copy, and Clear is enabled for app. windows with selections */
if ( GetScrap(nil, 'TEXT', &offset) > 0)
paste = true; /* if there’s any text in the clipboard, paste is enabled */
}
if ( undo )
EnableItem(menu, iUndo);
else
DisableItem(menu, iUndo);
if ( cutCopyClear ) {
EnableItem(menu, iCut);
EnableItem(menu, iCopy);
EnableItem(menu, iClear);
} else {
DisableItem(menu, iCut);
DisableItem(menu, iCopy);
DisableItem(menu, iClear);
}
if ( paste )
EnableItem(menu, iPaste);
else
DisableItem(menu, iPaste);
} /*AdjustMenus*/
/* This is called when an item is chosen from the menu bar (after calling
MenuSelect or MenuKey). It does the right thing for each command. */
#pragma segment Main
void DoMenuCommand(menuResult)
long menuResult;
{
short menuID, menuItem;
short itemHit, daRefNum;
Str255 daName;
OSErr saveErr;
TEHandle te;
WindowPtr window;
Handle aHandle;
long oldSize, newSize;
long total, contig;
window = FrontWindow();
menuID = HiWord(menuResult); /* use macros for efficiency to... */
menuItem = LoWord(menuResult); /* get menu item number and menu number */
switch ( menuID ) {
case mApple:
switch ( menuItem ) {
case iAbout: /* bring up alert for About */
itemHit = Alert(rAboutAlert, nil);
break;
default: /* all non-About items in this menu are DAs et al */
/* type Str255 is an array in MPW 3 */
GetItem(GetMHandle(mApple), menuItem, daName);
daRefNum = OpenDeskAcc(daName);
break;
}
break;
case mFile:
switch ( menuItem ) {
case iNew:
DoNew();
break;
case iClose:
DoCloseWindow(FrontWindow()); /* ignore the result */
break;
case iQuit:
Terminate();
break;
}
break;
case mEdit: /* call SystemEdit for DA editing & MultiFinder */
if ( !SystemEdit(menuItem-1) ) {
te = ((DocumentPeek) FrontWindow())->docTE;
switch ( menuItem ) {
case iCut:
if ( ZeroScrap() == noErr ) {
PurgeSpace(&total, &contig);
if ((*te)->selEnd - (*te)->selStart + kTESlop > contig)
AlertUser(eNoSpaceCut);
else
{
TECut(te);
if ( TEToScrap() != noErr ) {
AlertUser(eNoCut);
ZeroScrap();
}
}
}
break;
case iCopy:
if ( ZeroScrap() == noErr ) {
TECopy(te); /* after copying, export the TE scrap */
if ( TEToScrap() != noErr ) {
AlertUser(eNoCopy);
ZeroScrap();
}
}
break;
case iPaste: /* import the TE scrap before pasting */
if ( TEFromScrap() == noErr ) {
if ( TEGetScrapLen() + ((*te)->teLength -
((*te)->selEnd - (*te)->selStart)) > kMaxTELength )
AlertUser(eExceedPaste);
else {
aHandle = (Handle) TEGetText(te);
oldSize = GetHandleSize(aHandle);
newSize = oldSize + TEGetScrapLen() + kTESlop;
SetHandleSize(aHandle, newSize);
saveErr = MemError();
SetHandleSize(aHandle, oldSize);
if (saveErr != noErr)
AlertUser(eNoSpacePaste);
else
TEPaste(te);
}
}
else
AlertUser(eNoPaste);
break;
case iClear:
TEDelete(te);
break;
}
AdjustScrollbars(window, false);
AdjustTE(window);
}
break;
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Next Part belongs to TextPert reader sample.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
case Res_Menu_Open_Image:
DoMenuOpen_Image(menuItem); /* Go handle this Hier menu list */
break;
case Res_Menu_Analize_Page:
DoMenuAnalize_Page(menuItem); /* Go handle this Hier menu list */
break;
case Res_Menu_TextPert__DTK:
DoMenuTextPert__DTK(menuItem);/* Go handle this menu list */
break;
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
End of Part that belongs to TextPert reader sample.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
}
HiliteMenu(0); /* unhighlight what MenuSelect (or MenuKey) hilited */
} /*DoMenuCommand*/
/* Create a new document and window. */
#pragma segment Main
void DoNew()
{
Boolean good;
Ptr storage;
WindowPtr window;
Rect destRect, viewRect;
DocumentPeek doc;
storage = NewPtr(sizeof(DocumentRecord));
if ( storage != nil ) {
window = GetNewWindow(rDocWindow, storage, (WindowPtr) -1);
if ( window != nil ) {
gNumDocuments += 1; /* this will be decremented when we call DoCloseWindow */
good = false;
SetPort(window);
doc = (DocumentPeek) window;
GetTERect(window, &viewRect);
destRect = viewRect;
destRect.right = destRect.left + kMaxDocWidth;
doc->docTE = TENew(&destRect, &viewRect);
good = doc->docTE != nil; /* if TENew succeeded, we have a good document */
if ( good ) { /* 1.02 - good document? — proceed */
AdjustViewRect(doc->docTE);
TEAutoView(true, doc->docTE);
doc->docClik = (ProcPtr) (*doc->docTE)->clikLoop;
(*doc->docTE)->clikLoop = (ClikLoopProcPtr) AsmClikLoop;
}
if ( good ) { /* good document? — get scrollbars */
doc->docVScroll = GetNewControl(rVScroll, window);
good = (doc->docVScroll != nil);
}
if ( good) {
doc->docHScroll = GetNewControl(rHScroll, window);
good = (doc->docHScroll != nil);
}
if ( good ) { /* good? — adjust & draw the controls, draw the window */
/* false to AdjustScrollValues means musn’t redraw; technically, of course,
the window is hidden so it wouldn’t matter whether we called ShowControl or not. */
AdjustScrollValues(window, false);
ShowWindow(window);
} else {
DoCloseWindow(window); /* otherwise regret we ever created it... */
AlertUser(eNoWindow); /* and tell user */
}
} else
DisposPtr(storage); /* get rid of the storage if it is never used */
}
} /*DoNew*/
/* Close a window. This handles desk accessory and application windows. */
/* 1.01 - At this point, if there was a document associated with a
window, you could do any document saving processing if it is 'dirty'.
DoCloseWindow would return true if the window actually closed, i.e.,
the user didn’t cancel from a save dialog. This result is handy when
the user quits an application, but then cancels the save of a document
associated with a window. */
#pragma segment Main
Boolean DoCloseWindow(window)
WindowPtr window;
{
TEHandle te;
if ( IsDAWindow(window) )
CloseDeskAcc(((WindowPeek) window)->windowKind);
else if ( IsAppWindow(window) ) {
te = ((DocumentPeek) window)->docTE;
if ( te != nil )
{
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Next Part belongs to TextPert reader sample.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
if ((**te).teLength)
if (!(SaveText(te)))
return false;
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
End of the Part that belongs to TextPert reader sample.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
TEDispose(te); /* dispose the TEHandle if we got far enough to make one */
}
/* 1.01 - We used to call DisposeWindow, but that was technically
incorrect, even though we allocated storage for the window on
the heap. We should instead call CloseWindow to have the structures
taken care of and then dispose of the storage ourselves. */
CloseWindow(window);
DisposPtr((Ptr) window);
gNumDocuments -= 1;
}
return true;
} /*DoCloseWindow*/
/**************************************************************************************
*** 1.01 DoCloseBehind(window) was removed ***
1.01 - DoCloseBehind was a good idea for closing windows when quitting
and not having to worry about updating the windows, but it suffered
from a fatal flaw. If a desk accessory owned two windows, it would
close both those windows when CloseDeskAcc was called. When DoCloseBehind
got around to calling DoCloseWindow for that other window that was already
closed, things would go very poorly. Another option would be to have a
procedure, GetRearWindow, that would go through the window list and return
the last window. Instead, we decided to present the standard approach
of getting and closing FrontWindow until FrontWindow returns NIL. This
has a potential benefit in that the window whose document needs to be saved
may be visible since it is the front window, therefore decreasing the
chance of user confusion. For aesthetic reasons, the windows in the
application should be checked for updates periodically and have the
updates serviced.
**************************************************************************************/
/* Clean up the application and exit. We close all of the windows so that
they can update their documents, if any. */
/* 1.01 - If we find out that a cancel has occurred, we won't exit to the
shell, but will return instead. */
#pragma segment Main
void Terminate()
{
WindowPtr aWindow;
Boolean closed;
closed = true;
do {
aWindow = FrontWindow(); /* get the current front window */
if (aWindow != nil)
closed = DoCloseWindow(aWindow); /* close this window */
}
while (closed && (aWindow != nil));
if (closed)
{
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Next call belongs to TextPert reader sample.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
GlobalFree();
ExitToShell(); /* exit if no cancellation */
}
} /*Terminate*/
/* Set up the whole world, including global variables, Toolbox managers,
menus, and a single blank document. */
/* 1.01 - The code that used to be part of ForceEnvirons has been moved into
this module. If an error is detected, instead of merely doing an ExitToShell,
which leaves the user without much to go on, we call AlertUser, which puts
up a simple alert that just says an error occurred and then calls ExitToShell.
Since there is no other cleanup needed at this point if an error is detected,
this form of error- handling is acceptable. If more sophisticated error recovery
is needed, an exception mechanism, such as is provided by Signals, can be used. */
#pragma segment Initialize
void Initialize()
{
Handle menuBar;
long total, contig;
EventRecord event;
short count;
gInBackground = false;
InitGraf((Ptr) &qd.thePort);
InitFonts();
InitWindows();
InitMenus();
TEInit();
InitDialogs(nil);
InitCursor();
/* Call MPPOpen and ATPLoad at this point to initialize AppleTalk,
if you are using it. */
/* NOTE -- It is no longer necessary, and actually unhealthy, to check
PortBUse and SPConfig before opening AppleTalk. The drivers are capable
of checking for port availability themselves. */
/* This next bit of code is necessary to allow the default button of our
alert be outlined.
1.02 - Changed to call EventAvail so that we don't lose some important
events. */
for (count = 1; count <= 3; count++)
EventAvail(everyEvent, &event);
/* Ignore the error returned from SysEnvirons; even if an error occurred,
the SysEnvirons glue will fill in the SysEnvRec. You can save a redundant
call to SysEnvirons by calling it after initializing AppleTalk. */
SysEnvirons(kSysEnvironsVersion, &gMac);
/* Make sure that the machine has at least 128K ROMs. If it doesn't, exit. */
if (gMac.machineType < 0) BigBadError(eWrongMachine);
/* 1.02 - Move TrapAvailable call to after SysEnvirons so that we can tell
in TrapAvailable if a tool trap value is out of range. */
gHasWaitNextEvent = TrapAvailable(_WaitNextEvent, ToolTrap);
/* 1.01 - We used to make a check for memory at this point by examining ApplLimit,
ApplicZone, and StackSpace and comparing that to the minimum size we told
MultiFinder we needed. This did not work well because it assumed too much about
the relationship between what we asked MultiFinder for and what we would actually
get back, as well as how to measure it. Instead, we will use an alternate
method comprised of two steps. */
/* It is better to first check the size of the application heap against a value
that you have determined is the smallest heap the application can reasonably
work in. This number should be derived by examining the size of the heap that
is actually provided by MultiFinder when the minimum size requested is used.
The derivation of the minimum size requested from MultiFinder is described
in Sample.h. The check should be made because the preferred size can end up
being set smaller than the minimum size by the user. This extra check acts to
insure that your application is starting from a solid memory foundation. */
if ((long) GetApplLimit() - (long) ApplicZone() < kMinHeap) BigBadError(eSmallSize);
/* Next, make sure that enough memory is free for your application to run. It
is possible for a situation to arise where the heap may have been of required
size, but a large scrap was loaded which left too little memory. To check for
this, call PurgeSpace and compare the result with a value that you have determined
is the minimum amount of free memory your application needs at initialization.
This number can be derived several different ways. One way that is fairly
straightforward is to run the application in the minimum size configuration
as described previously. Call PurgeSpace at initialization and examine the value
returned. However, you should make sure that this result is not being modified
by the scrap's presence. You can do that by calling ZeroScrap before calling
PurgeSpace. Make sure to remove that call before shipping, though. */
/* ZeroScrap(); */
PurgeSpace(&total, &contig);
if (total < kMinSpace)
if (UnloadScrap() != noErr)
BigBadError(eNoMemory);
else {
PurgeSpace(&total, &contig);
if (total < kMinSpace)
BigBadError(eNoMemory);
}
/* The extra benefit to waiting until after the Toolbox Managers have been initialized
to check memory is that we can now give the user an alert to tell him/her what
happened. Although it is possible that the memory situation could be worsened by
displaying an alert, MultiFinder would gracefully exit the application with
an informative alert if memory became critical. Here we are acting more
in a preventative manner to avoid future disaster from low-memory problems. */
menuBar = GetNewMBar(rMenuBar); /* read menus into menu bar */
if ( menuBar == nil )
BigBadError(eNoMemory);
SetMenuBar(menuBar); /* install menus */
DisposHandle(menuBar);
AddResMenu(GetMHandle(mApple), 'DRVR'); /* add DA names to Apple menu */
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Next call belongs to TextPert reader sample.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
Init_TP_Menus();
DrawMenuBar();
gNumDocuments = 0;
/* do other initialization here */
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Next call has been removed for TextPert reader sample.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* DoNew(); */ /* create a single empty document */
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Next call belongs to TextPert reader sample.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
if (GlobalInit())
BigBadError(eNoMemory);
} /*Initialize*/
/* Used whenever a, like, fully fatal error happens */
#pragma segment Initialize
void BigBadError(error)
short error;
{
AlertUser(error);
ExitToShell();
}
/* Return a rectangle that is inset from the portRect by the size of
the scrollbars and a little extra margin. */
#pragma segment Main
void GetTERect(window,teRect)
WindowPtr window;
Rect *teRect;
{
*teRect = window->portRect;
InsetRect(teRect, kTextMargin, kTextMargin); /* adjust for margin */
teRect->bottom = teRect->bottom - 15; /* and for the scrollbars */
teRect->right = teRect->right - 15;
} /*GetTERect*/
/* Update the TERec's view rect so that it is the greatest multiple of
the lineHeight that still fits in the old viewRect. */
#pragma segment Main
void AdjustViewRect(docTE)
TEHandle docTE;
{
TEPtr te;
te = *docTE;
te->viewRect.bottom = (((te->viewRect.bottom - te->viewRect.top) / te->lineHeight)
* te->lineHeight) + te->viewRect.top;
} /*AdjustViewRect*/
/* Scroll the TERec around to match up to the potentially updated scrollbar
values. This is really useful when the window has been resized such that the
scrollbars became inactive but the TERec was already scrolled. */
#pragma segment Main
void AdjustTE(window)
WindowPtr window;
{
TEPtr te;
te = *((DocumentPeek)window)->docTE;
TEScroll((te->viewRect.left - te->destRect.left) -
GetCtlValue(((DocumentPeek)window)->docHScroll),
(te->viewRect.top - te->destRect.top) -
(GetCtlValue(((DocumentPeek)window)->docVScroll) *
te->lineHeight),
((DocumentPeek)window)->docTE);
} /*AdjustTE*/
/* Calculate the new control maximum value and current value, whether it is the horizontal or
vertical scrollbar. The vertical max is calculated by comparing the number of lines to the
vertical size of the viewRect. The horizontal max is calculated by comparing the maximum document
width to the width of the viewRect. The current values are set by comparing the offset between
the view and destination rects. If necessary and we canRedraw, have the control be re-drawn by
calling ShowControl. */
#pragma segment Main
void AdjustHV(isVert,control,docTE,canRedraw)
Boolean isVert;
ControlHandle control;
TEHandle docTE;
Boolean canRedraw;
{
short value, lines, max;
short oldValue, oldMax;
TEPtr te;
oldValue = GetCtlValue(control);
oldMax = GetCtlMax(control);
te = *docTE; /* point to TERec for convenience */
if ( isVert ) {
lines = te->nLines;
/* since nLines isn’t right if the last character is a return, check for that case */
if ( *(*te->hText + te->teLength - 1) == kCrChar )
lines += 1;
max = lines - ((te->viewRect.bottom - te->viewRect.top) /
te->lineHeight);
} else
max = kMaxDocWidth - (te->viewRect.right - te->viewRect.left);
if ( max < 0 ) max = 0;
SetCtlMax(control, max);
/* Must deref. after SetCtlMax since, technically, it could draw and therefore move
memory. This is why we don’t just do it once at the beginning. */
te = *docTE;
if ( isVert )
value = (te->viewRect.top - te->destRect.top) / te->lineHeight;
else
value = te->viewRect.left - te->destRect.left;
if ( value < 0 ) value = 0;
else if ( value > max ) value = max;
SetCtlValue(control, value);
/* now redraw the control if it needs to be and can be */
if ( canRedraw || (max != oldMax) || (value != oldValue) )
ShowControl(control);
} /*AdjustHV*/
/* Simply call the common adjust routine for the vertical and horizontal scrollbars. */
#pragma segment Main
void AdjustScrollValues(window,canRedraw)
WindowPtr window;
Boolean canRedraw;
{
DocumentPeek doc;
doc = (DocumentPeek)window;
AdjustHV(true, doc->docVScroll, doc->docTE, canRedraw);
AdjustHV(false, doc->docHScroll, doc->docTE, canRedraw);
} /*AdjustScrollValues*/
/* Re-calculate the position and size of the viewRect and the scrollbars.
kScrollTweek compensates for off-by-one requirements of the scrollbars
to have borders coincide with the growbox. */
#pragma segment Main
void AdjustScrollSizes(window)
WindowPtr window;
{
Rect teRect;
DocumentPeek doc;
doc = (DocumentPeek) window;
GetTERect(window, &teRect); /* start with TERect */
(*doc->docTE)->viewRect = teRect;
AdjustViewRect(doc->docTE); /* snap to nearest line */
MoveControl(doc->docVScroll, window->portRect.right - kScrollbarAdjust, -1);
SizeControl(doc->docVScroll, kScrollbarWidth, (window->portRect.bottom -
window->portRect.top) - (kScrollbarAdjust - kScrollTweek));
MoveControl(doc->docHScroll, -1, window->portRect.bottom - kScrollbarAdjust);
SizeControl(doc->docHScroll, (window->portRect.right -
window->portRect.left) - (kScrollbarAdjust - kScrollTweek),
kScrollbarWidth);
} /*AdjustScrollSizes*/
/* Turn off the controls by jamming a zero into their contrlVis fields (HideControl erases them
and we don't want that). If the controls are to be resized as well, call the procedure to do that,
then call the procedure to adjust the maximum and current values. Finally re-enable the controls
by jamming a $FF in their contrlVis fields. */
#pragma segment Main
void AdjustScrollbars(window,needsResize)
WindowPtr window;
Boolean needsResize;
{
DocumentPeek doc;
doc = (DocumentPeek) window;
/* First, turn visibility of scrollbars off so we won’t get unwanted redrawing */
(*doc->docVScroll)->contrlVis = kControlInvisible; /* turn them off */
(*doc->docHScroll)->contrlVis = kControlInvisible;
if ( needsResize ) /* move & size as needed */
AdjustScrollSizes(window);
AdjustScrollValues(window, needsResize); /* fool with max and current value */
/* Now, restore visibility in case we never had to ShowControl during adjustment */
(*doc->docVScroll)->contrlVis = kControlVisible; /* turn them on */
(*doc->docHScroll)->contrlVis = kControlVisible;
} /* AdjustScrollbars */
/* Gets called from our assembly language routine, AsmClikLoop, which is in
turn called by the TEClick toolbox routine. Saves the windows clip region,
sets it to the portRect, adjusts the scrollbar values to match the TE scroll
amount, then restores the clip region. */
#pragma segment Main
pascal void PascalClikLoop()
{
WindowPtr window;
RgnHandle region;
window = FrontWindow();
region = NewRgn();
GetClip(region); /* save clip */
ClipRect(&window->portRect);
AdjustScrollValues(window, true); /* pass true for canRedraw */
SetClip(region); /* restore clip */
DisposeRgn(region);
} /* Pascal/C ClikLoop */
/* Gets called from our assembly language routine, AsmClikLoop, which is in
turn called by the TEClick toolbox routine. It returns the address of the
default clikLoop routine that was put into the TERec by TEAutoView to
AsmClikLoop so that it can call it. */
#pragma segment Main
pascal ProcPtr GetOldClikLoop()
{
return ((DocumentPeek)FrontWindow())->docClik;
} /* GetOldClikLoop */
/* Check to see if a window belongs to the application. If the window pointer
passed was NIL, then it could not be an application window. WindowKinds
that are negative belong to the system and windowKinds less than userKind
are reserved by Apple except for windowKinds equal to dialogKind, which
mean it is a dialog.
1.02 - In order to reduce the chance of accidentally treating some window
as an AppWindow that shouldn't be, we'll only return true if the windowkind
is userKind. If you add different kinds of windows to Sample you'll need
to change how this all works. */
#pragma segment Main
Boolean IsAppWindow(window)
WindowPtr window;
{
short windowKind;
if ( window == nil )
return false;
else { /* application windows have windowKinds = userKind (8) */
windowKind = ((WindowPeek) window)->windowKind;
return (windowKind == userKind);
}
} /*IsAppWindow*/
/* Check to see if a window belongs to a desk accessory. */
#pragma segment Main
Boolean IsDAWindow(window)
WindowPtr window;
{
if ( window == nil )
return false;
else /* DA windows have negative windowKinds */
return ((WindowPeek) window)->windowKind < 0;
} /*IsDAWindow*/
/* Check to see if a given trap is implemented. This is only used by the
Initialize routine in this program, so we put it in the Initialize segment.
The recommended approach to see if a trap is implemented is to see if
the address of the trap routine is the same as the address of the
Unimplemented trap. */
/* 1.02 - Needs to be called after call to SysEnvirons so that it can check
if a ToolTrap is out of range of a pre-MacII ROM. */
#pragma segment Initialize
Boolean TrapAvailable(tNumber,tType)
short tNumber;
TrapType tType;
{
if ( ( tType == (unsigned char) ToolTrap ) &&
( gMac.machineType > envMachUnknown ) &&
( gMac.machineType < envMacII ) ) { /* it's a 512KE, Plus, or SE */
tNumber = tNumber & 0x03FF;
if ( tNumber > 0x01FF ) /* which means the tool traps */
tNumber = _Unimplemented; /* only go to 0x01FF */
}
return NGetTrapAddress(tNumber, tType) != GetTrapAddress(_Unimplemented);
} /*TrapAvailable*/
/* Display an alert that tells the user an error occurred, then exit the program.
This routine is used as an ultimate bail-out for serious errors that prohibit
the continuation of the application. Errors that do not require the termination
of the application should be handled in a different manner. Error checking and
reporting has a place even in the simplest application. The error number is used
to index an 'STR#' resource so that a relevant message can be displayed. */
#pragma segment Main
void AlertUser(error)
short error;
{
short itemHit;
Str255 message;
SetCursor(&qd.arrow);
/* type Str255 is an array in MPW 3 */
GetIndString(message, kErrStrings, error);
ParamText(message, "", "", "");
itemHit = Alert(rUserAlert, nil);
} /* AlertUser */