home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
CU Amiga Super CD-ROM 15
/
CU Amiga Magazine's Super CD-ROM 15 (1997)(EMAP Images)(GB)[!][issue 1997-10].iso
/
CUCD
/
Graphics
/
Ghostscript
/
source
/
dwimg.cpp
< prev
next >
Wrap
C/C++ Source or Header
|
1997-05-09
|
10KB
|
416 lines
/* Copyright (C) 1996, Russell Lang. All rights reserved.
This file is part of Aladdin Ghostscript.
Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
or distributor accepts any responsibility for the consequences of using it,
or for whether it serves any particular purpose or works at all, unless he
or she says so in writing. Refer to the Aladdin Ghostscript Free Public
License (the "License") for full details.
Every copy of Aladdin Ghostscript must include a copy of the License,
normally in a plain ASCII text file named PUBLIC. The License grants you
the right to copy, modify and redistribute Aladdin Ghostscript, but only
under certain conditions described in the License. Among other things, the
License requires that the copyright notice and this notice be preserved on
all copies.
*/
// dwimg.cpp
#define STRICT
#include <windows.h>
#include <shellapi.h>
extern "C" {
#include "gsdll.h"
}
#include "dwmain.h"
#include "dwdll.h"
#include "dwimg.h"
extern gsdll_class gsdll;
char szImgName[] = "Ghostscript Image";
#define M_COPY_CLIP 1
#if defined(_MSC_VER) && defined(__WIN32__)
#define _export
#else
#define max(a,b) ( (a>b) ? a : b )
#define min(a,b) ( (a<b) ? a : b )
#endif
// Forward references
LRESULT CALLBACK _export WndImgProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
HINSTANCE ImageWindow::hInstance;
HWND ImageWindow::hwndtext;
ImageWindow *ImageWindow::first;
// friend
ImageWindow *
FindImageWindow(char FAR *dev)
{
ImageWindow *iw;
for (iw = ImageWindow::first; iw!=0; iw=iw->next) {
if (iw->device == dev)
return iw;
}
return NULL;
}
// open window for device and add to list
void
ImageWindow::open(char FAR *dev)
{
// register class if first window
if (first == (ImageWindow *)NULL)
register_class();
// add to list
if (first)
next = first;
first = this;
// remember device handle
device = dev;
// open window
create_window();
}
// close window and remove from list
void
ImageWindow::close(void)
{
DestroyWindow(hwnd);
// remove from list
if (this == first) {
first = this->next;
}
else {
ImageWindow *tmp;
for (tmp = first; tmp!=0; tmp=tmp->next) {
if (this == tmp->next)
tmp->next = this->next;
}
}
}
void
ImageWindow::register_class(void)
{
WNDCLASS wndclass;
/* register the window class for graphics */
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndImgProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = sizeof(LONG);
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(hInstance,(LPSTR)MAKEINTRESOURCE(GSIMAGE_ICON));
wndclass.hCursor = LoadCursor((HINSTANCE)NULL, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szImgName;
RegisterClass(&wndclass);
}
void
ImageWindow::create_window(void)
{
HMENU sysmenu;
cxClient = cyClient = 0;
nVscrollPos = nVscrollMax = 0;
nHscrollPos = nHscrollMax = 0;
// create window
hwnd = CreateWindow(szImgName, (LPSTR)szImgName,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, (void FAR *)this);
ShowWindow(hwnd, SW_SHOWMINNOACTIVE);
// modify the menu to have the new items we want
sysmenu = GetSystemMenu(hwnd, 0); // get the sysmenu
AppendMenu(sysmenu, MF_SEPARATOR, 0, NULL);
AppendMenu(sysmenu, MF_STRING, M_COPY_CLIP, "Copy to Clip&board");
}
void
ImageWindow::sync(void)
{
if ( !IsWindow(hwnd) ) // some clod closed the window
create_window();
if ( !IsIconic(hwnd) ) { /* redraw window */
InvalidateRect(hwnd, NULL, 1);
UpdateWindow(hwnd);
}
}
void
ImageWindow::page(void)
{
if (IsIconic(hwnd)) // useless as an Icon so fix it
ShowWindow(hwnd, SW_SHOWNORMAL);
BringWindowToTop(hwnd);
sync();
}
void
ImageWindow::size(int x, int y)
{
width = x;
height = y;
}
/* image window */
LRESULT CALLBACK _export
WndImgProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
ImageWindow *iw;
if (message == WM_CREATE) {
// Object is stored in window extra data.
// Nothing must try to use the object before WM_CREATE
// initializes it here.
iw = (ImageWindow *)(((CREATESTRUCT FAR *)lParam)->lpCreateParams);
SetWindowLong(hwnd, 0, (LONG)iw);
}
// call the object window procedure
iw = (ImageWindow *)GetWindowLong(hwnd, 0);
return iw->WndProc(hwnd, message, wParam, lParam);
}
/* graphics window */
LRESULT
ImageWindow::WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
RECT rect;
int nVscrollInc, nHscrollInc;
switch(message) {
case WM_SYSCOMMAND:
// copy to clipboard
if (LOWORD(wParam) == M_COPY_CLIP) {
HGLOBAL hglobal;
HPALETTE hpalette;
gsdll.lock_device(device, 1);
hglobal = gsdll.copy_dib(device);
if (hglobal == (HGLOBAL)NULL) {
MessageBox(hwnd, "Not enough memory to Copy to Clipboard",
szImgName, MB_OK | MB_ICONEXCLAMATION);
gsdll.lock_device(device, 0);
return 0;
}
OpenClipboard(hwnd);
EmptyClipboard();
SetClipboardData(CF_DIB, hglobal);
hpalette = gsdll.copy_palette(device);
if (hpalette)
SetClipboardData(CF_PALETTE, hpalette);
CloseClipboard();
gsdll.lock_device(device, 0);
return 0;
}
break;
case WM_CREATE:
// enable drag-drop
DragAcceptFiles(hwnd, TRUE);
break;
case WM_SIZE:
if (wParam == SIZE_MINIMIZED)
return(0);
cyClient = HIWORD(lParam);
cxClient = LOWORD(lParam);
cyAdjust = min(height, cyClient) - cyClient;
cyClient += cyAdjust;
nVscrollMax = max(0, height - cyClient);
nVscrollPos = min(nVscrollPos, nVscrollMax);
SetScrollRange(hwnd, SB_VERT, 0, nVscrollMax, FALSE);
SetScrollPos(hwnd, SB_VERT, nVscrollPos, TRUE);
cxAdjust = min(width, cxClient) - cxClient;
cxClient += cxAdjust;
nHscrollMax = max(0, width - cxClient);
nHscrollPos = min(nHscrollPos, nHscrollMax);
SetScrollRange(hwnd, SB_HORZ, 0, nHscrollMax, FALSE);
SetScrollPos(hwnd, SB_HORZ, nHscrollPos, TRUE);
if ((wParam==SIZENORMAL) && (cxAdjust!=0 || cyAdjust!=0)) {
GetWindowRect(GetParent(hwnd),&rect);
MoveWindow(GetParent(hwnd),rect.left,rect.top,
rect.right-rect.left+cxAdjust,
rect.bottom-rect.top+cyAdjust, TRUE);
cxAdjust = cyAdjust = 0;
}
return(0);
case WM_VSCROLL:
switch(LOWORD(wParam)) {
case SB_TOP:
nVscrollInc = -nVscrollPos;
break;
case SB_BOTTOM:
nVscrollInc = nVscrollMax - nVscrollPos;
break;
case SB_LINEUP:
nVscrollInc = -cyClient/16;
break;
case SB_LINEDOWN:
nVscrollInc = cyClient/16;
break;
case SB_PAGEUP:
nVscrollInc = min(-1,-cyClient);
break;
case SB_PAGEDOWN:
nVscrollInc = max(1,cyClient);
break;
case SB_THUMBTRACK:
case SB_THUMBPOSITION:
#ifdef __WIN32__
nVscrollInc = HIWORD(wParam) - nVscrollPos;
#else
nVscrollInc = LOWORD(lParam) - nVscrollPos;
#endif
break;
default:
nVscrollInc = 0;
}
if ((nVscrollInc = max(-nVscrollPos,
min(nVscrollInc, nVscrollMax - nVscrollPos)))!=0) {
nVscrollPos += nVscrollInc;
ScrollWindow(hwnd,0,-nVscrollInc,NULL,NULL);
SetScrollPos(hwnd,SB_VERT,nVscrollPos,TRUE);
UpdateWindow(hwnd);
}
return(0);
case WM_HSCROLL:
switch(LOWORD(wParam)) {
case SB_LINEUP:
nHscrollInc = -cxClient/16;
break;
case SB_LINEDOWN:
nHscrollInc = cyClient/16;
break;
case SB_PAGEUP:
nHscrollInc = min(-1,-cxClient);
break;
case SB_PAGEDOWN:
nHscrollInc = max(1,cxClient);
break;
case SB_THUMBTRACK:
case SB_THUMBPOSITION:
#ifdef __WIN32__
nHscrollInc = HIWORD(wParam) - nHscrollPos;
#else
nHscrollInc = LOWORD(lParam) - nHscrollPos;
#endif
break;
default:
nHscrollInc = 0;
}
if ((nHscrollInc = max(-nHscrollPos,
min(nHscrollInc, nHscrollMax - nHscrollPos)))!=0) {
nHscrollPos += nHscrollInc;
ScrollWindow(hwnd,-nHscrollInc,0,NULL,NULL);
SetScrollPos(hwnd,SB_HORZ,nHscrollPos,TRUE);
UpdateWindow(hwnd);
}
return(0);
case WM_KEYDOWN:
switch(LOWORD(wParam)) {
case VK_HOME:
SendMessage(hwnd,WM_VSCROLL,SB_TOP,0L);
break;
case VK_END:
SendMessage(hwnd,WM_VSCROLL,SB_BOTTOM,0L);
break;
case VK_PRIOR:
SendMessage(hwnd,WM_VSCROLL,SB_PAGEUP,0L);
break;
case VK_NEXT:
SendMessage(hwnd,WM_VSCROLL,SB_PAGEDOWN,0L);
break;
case VK_UP:
SendMessage(hwnd,WM_VSCROLL,SB_LINEUP,0L);
break;
case VK_DOWN:
SendMessage(hwnd,WM_VSCROLL,SB_LINEDOWN,0L);
break;
case VK_LEFT:
SendMessage(hwnd,WM_HSCROLL,SB_PAGEUP,0L);
break;
case VK_RIGHT:
SendMessage(hwnd,WM_HSCROLL,SB_PAGEDOWN,0L);
break;
case VK_RETURN:
BringWindowToTop(hwndtext);
break;
}
return(0);
case WM_CHAR:
// send on all characters to text window
if (hwndtext)
SendMessage(hwndtext, message, wParam, lParam);
return 0;
case WM_PAINT:
{
int sx,sy,wx,wy,dx,dy;
hdc = BeginPaint(hwnd, &ps);
SetMapMode(hdc, MM_TEXT);
SetBkMode(hdc,OPAQUE);
gsdll.lock_device(device, 1);
rect = ps.rcPaint;
dx = rect.left; /* destination */
dy = rect.top;
wx = rect.right-rect.left; /* width */
wy = rect.bottom-rect.top;
sx = rect.left; /* source */
sy = rect.top;
sx += nHscrollPos; /* scrollbars */
sy += nVscrollPos;
if (sx+wx > width)
wx = width - sx;
if (sy+wy > height)
wy = height - sy;
gsdll.draw(device, hdc, dx, dy, wx, wy, sx, sy);
gsdll.lock_device(device, 0);
EndPaint(hwnd, &ps);
return 0;
}
case WM_DROPFILES:
SendMessage(hwndtext, message, wParam, lParam);
break;
case WM_DESTROY:
DragAcceptFiles(hwnd, FALSE);
break;
}
not_ours:
return DefWindowProc(hwnd, message, wParam, lParam);
}