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OWLOLE2.CPP
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C/C++ Source or Header
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1997-05-06
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645 lines
//----------------------------------------------------------------------------
// ObjectWindows - (C) Copyright 1991, 1994 by Borland International
// Ole tutorial application -- owlole2.cpp
//----------------------------------------------------------------------------
#include <owl/pch.h>
#include <owl/applicat.h>
#include <owl/decframe.h>
#include <owl/dc.h>
#include <owl/inputdia.h>
#include <owl/opensave.h>
#include <owl/controlb.h>
#include <owl/buttonga.h>
#include <owl/statusba.h>
#include <owl/gdiobjec.h>
#include <owl/chooseco.h>
#include <owl/oleframe.h>
#include <owl/olewindo.h>
#include <ocf/ocstorag.h>
#include <classlib/arrays.h>
#include <stdlib.h>
#include <string.h>
#include "owlole2.rc"
// App registration object
//
static TPointer<TOcRegistrar> Registrar;
DEFINE_APP_DICTIONARY(AppDictionary);
#define DocExt "sp2" // Scribble Pad #2 document extension
REGISTRATION_FORMAT_BUFFER(100)
BEGIN_REGISTRATION(AppReg)
REGDATA(clsid, "{B6B58B60-B9C3-101B-B3FF-86C8A0834EDE}")
REGDATA(appname, "Scribble Pad")
END_REGISTRATION
// Register clipboard formats
//
BEGIN_REGISTRATION(DocReg)
REGDATA(progid, "Scribble.Pad.2")
REGDATA(description,"Scribble Pad (Container)")
REGDATA(extension, DocExt )
REGDATA(docfilter, "*." DocExt)
REGFORMAT(0, ocrEmbedSource, ocrContent, ocrIStorage, ocrGet)
REGFORMAT(1, ocrMetafilePict, ocrContent, ocrMfPict|ocrStaticMed, ocrGet)
REGFORMAT(2, ocrBitmap, ocrContent, ocrGDI|ocrStaticMed, ocrGet)
REGFORMAT(3, ocrDib, ocrContent, ocrHGlobal|ocrStaticMed, ocrGet)
REGFORMAT(4, ocrLinkSource, ocrContent, ocrIStream, ocrGet)
END_REGISTRATION
TRegLink* RegLinkHead = 0;
TRegLink DocLink(DocReg, RegLinkHead);
const char ScribbleAppTitle[] = "Scribble";
//----------------------------------------------------------------------------
typedef TArray<TPoint> TPoints;
typedef TArrayIterator<TPoint> TPointsIterator;
class TLine : public TPoints {
public:
// Constructor to allow construction from a color and a pen size.
// Also serves as default constructor.
TLine(const TColor& color = TColor(0), int penSize = 1) :
TPoints(10, 0, 10), PenSize(penSize), Color(color) {}
// Functions to modify and query pen attributes.
int QueryPenSize() const
{
return PenSize;
}
TColor& QueryColor()
{
return Color;
}
void SetPen(const TColor& newColor, int penSize = 0);
void SetPen(int penSize);
// TLine draws itself. Returns true if everything went OK.
virtual bool Draw(TDC&) const;
// The == operator must be defined for the container class, even if unused
bool operator ==(const TLine& other) const
{
return &other == this;
}
friend ostream& operator <<(ostream& os, const TLine& line);
friend istream& operator >>(istream& is, TLine& line);
protected:
int PenSize;
TColor Color;
};
void
TLine::SetPen(int penSize)
{
if (penSize < 1)
PenSize = 1;
else
PenSize = penSize;
}
void
TLine::SetPen(const TColor& newColor, int penSize)
{
// If penSize isn't the default (0), set PenSize to the new size.
if (penSize)
PenSize = penSize;
Color = newColor;
}
bool
TLine::Draw(TDC& dc) const
{
// Set pen for the dc to the values for this line
TPen pen(Color, PenSize);
dc.SelectObject(pen);
// Iterates through the points in the line i.
TPointsIterator j(*this);
bool first = true;
while (j) {
TPoint p = j++;
if (!first)
dc.LineTo(p);
else {
dc.MoveTo(p);
first = false;
}
}
dc.RestorePen();
return true;
}
ostream&
operator <<(ostream& os, const TLine& line)
{
// Write the number of points in the line
os << line.GetItemsInContainer();
// Get and write pen attributes.
os << ' ' << line.Color << ' ' << line.PenSize;
// Get an iterator for the array of points
TPointsIterator j(line);
// While the iterator is valid (i.e. we haven't run out of points)
while(j)
// Write the point from the iterator and increment the array.
os << j++;
os << '\n';
// return the stream object
return os;
}
istream&
operator >>(istream& is, TLine& line)
{
unsigned numPoints;
is >> numPoints;
COLORREF color;
int penSize;
is >> color >> penSize;
line.SetPen(TColor(color), penSize);
while (numPoints--) {
TPoint point;
is >> point;
line.Add(point);
}
// return the stream object
return is;
}
//----------------------------------------------------------------------------
typedef TArray<TLine> TLines;
typedef TArrayIterator<TLine> TLinesIterator;
class TScribbleWindow : public TOleWindow {
public:
TScribbleWindow(TWindow* parent, TOpenSaveDialog::TData& fileData);
~TScribbleWindow()
{
delete Line;
delete Lines;
}
protected:
TPen* Pen;
TLines* Lines;
TLine* Line; // To hold a single line at a time that later gets
// stuck in Lines
TOpenSaveDialog::TData& FileData;
bool IsDirty, IsNewFile;
void GetPenSize(); // GetPenSize always calls Line->SetPen().
// Override member function of TWindow
void SetupWindow();
bool CanClose();
// Message response functions
void EvLButtonDown(uint, TPoint&);
void EvRButtonDown(uint, TPoint&);
void EvMouseMove(uint, TPoint&);
void EvLButtonUp(uint, TPoint&);
void Paint(TDC&, bool, TRect&);
void CmFileNew();
void CmFileOpen();
void CmFileSave();
void CmFileSaveAs();
void CmPenSize();
void CmPenColor();
void CmAbout();
void SaveFile(bool pathChanged);
void OpenFile();
const char far* EvOcViewTitle(){return ScribbleAppTitle; }
DECLARE_RESPONSE_TABLE(TScribbleWindow);
};
DEFINE_RESPONSE_TABLE1(TScribbleWindow, TOleWindow)
EV_WM_LBUTTONDOWN,
EV_WM_RBUTTONDOWN,
EV_WM_MOUSEMOVE,
EV_WM_LBUTTONUP,
EV_COMMAND(CM_FILESAVE, CmFileSave),
EV_COMMAND(CM_FILESAVEAS, CmFileSaveAs),
EV_COMMAND(CM_PENSIZE, CmPenSize),
EV_COMMAND(CM_PENCOLOR, CmPenColor),
EV_COMMAND(CM_ABOUT, CmAbout),
EV_OC_VIEWTITLE,
END_RESPONSE_TABLE;
TScribbleWindow::TScribbleWindow(TWindow* parent, TOpenSaveDialog::TData& fileData)
:
TOleWindow(parent, 0),
FileData(fileData)
{
Lines = new TLines(5, 0, 5);
Line = new TLine(TColor::Black, 1);
Pen = 0;
IsNewFile = true;
IsDirty = false;
// Create a OcDocument object to hold the ole parts that we create
// and a OcView to provide ole services
//
CreateOcView(RegLinkHead, false, 0);
}
void
TScribbleWindow::SetupWindow()
{
TOleWindow::SetupWindow();
if (*FileData.FileName)
OpenFile();
else
SetDocTitle("Untitled", 0);
}
bool
TScribbleWindow::CanClose()
{
if (IsDirty)
switch (MessageBox("Do you want to save?", "Scribbling has changed",
MB_YESNOCANCEL | MB_ICONQUESTION)) {
case IDCANCEL:
// Choosing Cancel means to abort the close -- return false.
return false;
case IDYES:
// Choosing Yes means to save the drawing, then close.
CmFileSave();
break;
case IDNO:
// Choosing No means don't save the drawing but close.
// NOTE: Still need to call TOleWindow::CanClose for OLE cleanup
break;
}
// Allow TOleWindow to perform OLE document cleanup
//
return TOleWindow::CanClose();
}
void
TScribbleWindow::EvLButtonDown(uint modKeys, TPoint& point)
{
TOleWindow::EvLButtonDown(modKeys, point);
if (DragDC && !SelectEmbedded()) {
SetCapture();
Pen = new TPen(Line->QueryColor(), Line->QueryPenSize());
DragDC->SelectObject(*Pen);
DragDC->MoveTo(point);
Line->Add(point);
IsDirty = true;
}
}
void
TScribbleWindow::EvRButtonDown(uint modKeys, TPoint& point)
{
TOleWindow::EvRButtonDown(modKeys, point);
if (!SelectEmbedded())
GetPenSize();
}
void
TScribbleWindow::EvMouseMove(uint modKeys, TPoint& point)
{
TOleWindow::EvMouseMove(modKeys, point);
if (DragDC && !SelectEmbedded()) {
DragDC->LineTo(point);
Line->Add(point);
}
}
void
TScribbleWindow::EvLButtonUp(uint modKeys, TPoint& point)
{
if (DragDC) {
if (!SelectEmbedded()) {
ReleaseCapture();
if (Line->GetItemsInContainer() > 1)
Lines->Add(*Line);
Line->Flush();
delete Pen;
Pen = 0;
}
}
TOleWindow::EvLButtonUp(modKeys, point);
}
void
TScribbleWindow::CmPenSize()
{
GetPenSize();
}
void
TScribbleWindow::CmPenColor()
{
TChooseColorDialog::TData colors;
static TColor custColors[16] = {
0x010101L, 0x101010L, 0x202020L, 0x303030L,
0x404040L, 0x505050L, 0x606060L, 0x707070L,
0x808080L, 0x909090L, 0xA0A0A0L, 0xB0B0B0L,
0xC0C0C0L, 0xD0D0D0L, 0xE0E0E0L, 0xF0F0F0L
};
colors.Flags = CC_RGBINIT;
colors.Color = TColor(Line->QueryColor());
colors.CustColors = custColors;
if (TChooseColorDialog(this, colors).Execute() == IDOK)
Line->SetPen(colors.Color);
}
void
TScribbleWindow::GetPenSize()
{
char inputText[6];
int penSize = Line->QueryPenSize();
wsprintf(inputText, "%d", penSize);
if (TInputDialog(this, "Line Thickness",
"Input a new thickness:",
inputText,
sizeof(inputText)).Execute() == IDOK) {
penSize = atoi(inputText);
if (penSize < 1)
penSize = 1;
}
Line->SetPen(penSize);
}
void
TScribbleWindow::Paint(TDC& dc, bool erase, TRect& rect)
{
TOleWindow::Paint(dc, erase, rect);
// Iterates through the array of line objects.
TLinesIterator i(*Lines);
while (i)
i++.Draw(dc);
}
void
TScribbleWindow::CmFileSave()
{
if (IsNewFile)
CmFileSaveAs();
else
SaveFile(false);
}
void
TScribbleWindow::CmFileSaveAs()
{
if (TFileSaveDialog(this, FileData).Execute() == IDOK)
SaveFile(true);
}
void
TScribbleWindow::CmAbout()
{
TDialog(this, IDD_ABOUT).Execute();
}
void
TScribbleWindow::SaveFile(bool pathChanged)
{
if (pathChanged && !OcDoc->SaveToFile(FileData.FileName))
return; // error!
TOcStorage* storage = OcDoc->GetStorage();
if (!storage) {
MessageBox("Bogus internal storage problem", "File Error", MB_OK | MB_ICONEXCLAMATION);
}
else {
TOcStream stream(*storage, "Scribble", true, STGM_READWRITE);
ostrstream os;
// Write the number of lines in the figure
os << Lines->GetItemsInContainer();
// Append a description using a resource string
os << ' ' << string(*GetApplication(), IDS_FILEINFO) << '\n';
// Get an iterator for the array of lines
TLinesIterator i(*Lines);
// While the iterator is valid (i.e. we haven't run out of lines)
while (i)
// Copy the current line from the iterator and increment the array.
os << i++;
// Set new file and dirty display indicator to false.
IsNewFile = IsDirty = false;
if (pathChanged)
SetDocTitle(FileData.FileName, 0);
OcDoc->SetName(FileData.FileName);
stream.Write(os.str(), os.pcount());
stream.Commit(STGC_DEFAULT);
OcDoc->SaveParts(0, true);
OcDoc->GetStorage()->Commit(STGC_DEFAULT);
}
}
void
TScribbleWindow::OpenFile()
{
try {
OcDoc->SetStorage(FileData.FileName);
TOcStorage* storage = OcDoc->GetStorage();
if (!storage)
MessageBox("Bogus internal storage problem", "File Error", MB_OK | MB_ICONEXCLAMATION);
else {
TOcStream stream(*storage, "Scribble", false, STGM_READWRITE);
// figure out the size of our stream to read, & read it into a buffer
uint64 size;
stream.Seek(0, STREAM_SEEK_END, &size);
char* buff = new char[(int)size.LowPart+10];
stream.Seek(0, STREAM_SEEK_SET);
stream.Read(buff, size.LowPart);
// now make the buffer into a input str stream & stream in our objects
istrstream is(buff, (int)size.LowPart);
unsigned numLines;
char fileinfo[100];
Lines->Flush();
Line->Flush();
is >> numLines;
is.getline(fileinfo, sizeof(fileinfo));
SetDocTitle(FileData.FileName, 0);
for (int i = 0; i < numLines; i++) {
TLine line;
is >> line;
Lines->Add(line);
}
delete [] buff;
OcDoc->LoadParts();
}
IsNewFile = IsDirty = false;
Invalidate();
}
catch(TXBase& xbase) {
MessageBox(xbase.why().c_str(), "EXCEPTION", MB_OK);
}
}
//----------------------------------------------------------------------------
class TScribbleApp : public TApplication, public TOcModule {
public:
TScribbleApp();
TUnknown* CreateOleObject(uint32 /*options*/, TRegLink* /*link*/) {return 0;}
protected:
void InitMainWindow();
void InitInstance();
void CmFileNew();
void CmFileOpen();
TOpenSaveDialog::TData FileData;
DECLARE_RESPONSE_TABLE(TScribbleApp);
};
DEFINE_RESPONSE_TABLE1(TScribbleApp, TApplication)
EV_COMMAND(CM_FILENEW, CmFileNew),
EV_COMMAND(CM_FILEOPEN, CmFileOpen),
END_RESPONSE_TABLE;
TScribbleApp::TScribbleApp()
:
TApplication(::AppReg["appname"]),
FileData(OFN_HIDEREADONLY|OFN_FILEMUSTEXIST,
"Scribble Files (*."DocExt")|*."DocExt"|", 0, "", DocExt)
{
}
void
TScribbleApp::InitMainWindow()
{
// Construct the ole decorated frame window
TOleFrame* frame = new TOleFrame(GetName(), 0, true, this);
// Construct a status bar
TStatusBar* sb = new TStatusBar(frame, TGadget::Recessed);
// Construct a control bar
TControlBar* cb = new TControlBar(frame);
cb->Insert(*new TButtonGadget(CM_FILENEW, CM_FILENEW, TButtonGadget::Command));
cb->Insert(*new TButtonGadget(CM_FILEOPEN, CM_FILEOPEN, TButtonGadget::Command));
cb->Insert(*new TButtonGadget(CM_FILESAVE, CM_FILESAVE, TButtonGadget::Command));
cb->Insert(*new TButtonGadget(CM_FILESAVEAS, CM_FILESAVEAS, TButtonGadget::Command));
cb->Insert(*new TSeparatorGadget);
cb->Insert(*new TButtonGadget(CM_PENSIZE, CM_PENSIZE, TButtonGadget::Command));
cb->Insert(*new TButtonGadget(CM_PENCOLOR, CM_PENCOLOR, TButtonGadget::Command));
cb->Insert(*new TSeparatorGadget);
cb->Insert(*new TButtonGadget(CM_ABOUT, CM_ABOUT, TButtonGadget::Command));
cb->Attr.Id = IDW_TOOLBAR;
// Insert the status bar and control bar into the frame
frame->Insert(*sb, TDecoratedFrame::Bottom);
frame->Insert(*cb, TDecoratedFrame::Top);
// Set the menu & icon
frame->SetMenuDescr(TMenuDescr(IDM_SCRIBBLE));
frame->SetIcon(this, IDI_TUTORIAL);
// Set the main window
SetMainWindow(frame);
}
//
// Call file new command handler to get the initial new window
//
void
TScribbleApp::InitInstance()
{
TApplication::InitInstance();
FileData.FileName[0] = 0;
TWindow* client = new TScribbleWindow(0, FileData);
TWindow* oldClient = GetMainWindow()->SetClientWindow(client);
if (oldClient) {
oldClient->Destroy();
delete oldClient;
}
}
void
TScribbleApp::CmFileNew()
{
TWindow* scribbleWindow = GetMainWindow()->GetClientWindow();
if (!scribbleWindow->CanClose())
return;
FileData.FileName[0] = 0;
TWindow* client = new TScribbleWindow(0, FileData);
GetMainWindow()->SetClientWindow(client);
scribbleWindow->Destroy(0);
delete scribbleWindow;
}
void
TScribbleApp::CmFileOpen()
{
TWindow* scribbleWindow = GetMainWindow()->GetClientWindow();
if (!scribbleWindow->CanClose())
return;
if (TFileOpenDialog(GetMainWindow(), FileData).Execute() == IDOK) {
TWindow* newScribbleWindow = new TScribbleWindow(0, FileData);
GetMainWindow()->SetClientWindow(newScribbleWindow);
scribbleWindow->Destroy(0);
delete scribbleWindow;
}
}
int
OwlMain(int /*argc*/, char* /*argv*/ [])
{
try {
Registrar = new TOcRegistrar(::AppReg, TOleFactory<TScribbleApp>(),
TApplication::GetCmdLine());
return Registrar->Run();
}
catch (xmsg& x) {
::MessageBox(0, x.why().c_str(), "Scribble App Exception", MB_OK);
}
return -1;
}