LRESULT CALLBACK Viewer::WndProcViewer(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
WORD id;
POINTS pts;
Viewer *v;
if(!g_viewer) goto exit1;
v=g_viewer;
switch(msg) {
case WM_ERASEBKGND:
return 1;
case WM_PAINT:
{
PAINTSTRUCT paintStruct;
HDC hdc;
HBRUSH hbr1;
int rv;
hdc = BeginPaint(hwnd, &paintStruct);
if(v->m_dib) {
v->GoodScrollPos();
// paint the image
SetStretchBltMode(hdc,COLORONCOLOR);
rv=StretchDIBits(hdc,
v->m_imgpos_x,v->m_imgpos_y,v->m_stretchedwidth,v->m_stretchedheight,
0,0,v->m_dib->biWidth,v->m_dib->biHeight,
v->m_bits,(LPBITMAPINFO)v->m_dib,
DIB_RGB_COLORS,SRCCOPY);
if(rv==GDI_ERROR || rv<1) {
RECT r1;
// Failure probably means we've exceeded the video system's
// stretching limits. Draw a black rectangle instead.
r1.left=v->m_imgpos_x;
r1.top=v->m_imgpos_y;
r1.right=v->m_imgpos_x+v->m_stretchedwidth;
r1.bottom=v->m_imgpos_y+v->m_stretchedheight;
FillRect(hdc,&r1,(HBRUSH)GetStockObject(BLACK_BRUSH));
}
// paint the background
ExcludeClipRect(hdc,
v->m_imgpos_x, v->m_imgpos_y,
v->m_imgpos_x+v->m_stretchedwidth, v->m_imgpos_y+v->m_stretchedheight);
if(globals.window_bgcolor==TWPNG_WBG_SYSDEFAULT) {
FillRect(hdc,&v->m_clientrect,GetSysColorBrush(COLOR_WINDOW));
}
else {
if(globals.window_bgcolor==TWPNG_WBG_SAMEASIMAGE && v->m_imghasbgcolor)
hbr1 = CreateSolidBrush(v->m_imgbgcolor);
else
hbr1 = CreateSolidBrush(globals.custombgcolor);
FillRect(hdc,&v->m_clientrect,hbr1);
DeleteObject(hbr1);
}
}
else {
FillRect(hdc,&v->m_clientrect,GetSysColorBrush(COLOR_WINDOW));
if(v->m_errorflag) {
SetTextColor(hdc,RGB(128,0,0));
SetBkColor(hdc,RGB(255,255,255));
SetBkMode(hdc,OPAQUE);
SelectObject(hdc,GetStockObject(ANSI_VAR_FONT));
DrawText(hdc,v->m_errormsg,-1,&v->m_clientrect,
DT_NOPREFIX|DT_WORDBREAK);
}
}
EndPaint(hwnd, &paintStruct);
return 0;
}
case WM_INITMENU:
{
HMENU m;
m=(HMENU)wParam;
EnableMenuItem(m,ID_COPYIMAGE,MF_BYCOMMAND|(v->m_dib?MF_ENABLED:MF_GRAYED));
CheckMenuItem(m,ID_GAMMACORRECT,MF_BYCOMMAND|
(globals.use_gamma?MF_CHECKED:MF_UNCHECKED));
CheckMenuItem(m,ID_CORRECTNONSQUARE,MF_BYCOMMAND|
(globals.viewer_correct_nonsquare?MF_CHECKED:MF_UNCHECKED));
CheckMenuItem(m,ID_BG_CUSTOM,MF_BYCOMMAND|
(globals.use_custombg==1 && globals.use_imagebg==0 ? MF_CHECKED:MF_UNCHECKED));
CheckMenuItem(m,ID_BG_IMAGEORCUSTOM,MF_BYCOMMAND|
(globals.use_custombg && globals.use_imagebg ? MF_CHECKED:MF_UNCHECKED));
CheckMenuItem(m,ID_BG_STRIPALPHA,MF_BYCOMMAND|
(globals.use_custombg==0 && globals.use_imagebg==0 ? MF_CHECKED:MF_UNCHECKED));
CheckMenuItem(m,ID_WBG_SAMEASIMAGE,MF_BYCOMMAND|
(globals.window_bgcolor==TWPNG_WBG_SAMEASIMAGE?MF_CHECKED:MF_UNCHECKED));
CheckMenuItem(m,ID_WBG_SYSDEFAULT,MF_BYCOMMAND|
(globals.window_bgcolor==TWPNG_WBG_SYSDEFAULT?MF_CHECKED:MF_UNCHECKED));
CheckMenuItem(m,ID_WBG_CUSTOM,MF_BYCOMMAND|
(globals.window_bgcolor==TWPNG_WBG_CUSTOM?MF_CHECKED:MF_UNCHECKED));
CheckMenuItem(m,ID_ZOOM_FIT,MF_BYCOMMAND|(globals.vsize==TWPNG_VS_FIT?MF_CHECKED:MF_UNCHECKED));
CheckMenuItem(m,ID_ZOOM_1_8,MF_BYCOMMAND|(globals.vsize==TWPNG_VS_1_8?MF_CHECKED:MF_UNCHECKED));
CheckMenuItem(m,ID_ZOOM_1_4,MF_BYCOMMAND|(globals.vsize==TWPNG_VS_1_4?MF_CHECKED:MF_UNCHECKED));
CheckMenuItem(m,ID_ZOOM_1_2,MF_BYCOMMAND|(globals.vsize==TWPNG_VS_1_2?MF_CHECKED:MF_UNCHECKED));
CheckMenuItem(m,ID_ZOOM_1,MF_BYCOMMAND|(globals.vsize==TWPNG_VS_1?MF_CHECKED:MF_UNCHECKED));
CheckMenuItem(m,ID_ZOOM_2,MF_BYCOMMAND|(globals.vsize==TWPNG_VS_2?MF_CHECKED:MF_UNCHECKED));
CheckMenuItem(m,ID_ZOOM_4,MF_BYCOMMAND|(globals.vsize==TWPNG_VS_4?MF_CHECKED:MF_UNCHECKED));
//CheckMenuItem(m,ID_ZOOM_8,MF_BYCOMMAND|(globals.vsize==TWPNG_VS_8?MF_CHECKED:MF_UNCHECKED));
return 0;
}
case WM_DESTROY:
twpng_StoreWindowPos(hwnd,&globals.window_prefs.viewer);
delete g_viewer;
g_viewer=NULL;
SetFocus(globals.hwndMain);
return 0;
case WM_SIZE:
GetClientRect(hwnd,&v->m_clientrect);
if(globals.vsize==TWPNG_VS_FIT) v->CalcStretchedSize();
return 0;
case WM_DROPFILES:
if(globals.dlgs_open<1)
DroppedFiles((HDROP)wParam);
return 0;
case WM_LBUTTONDBLCLK:
if(globals.vsize==TWPNG_VS_1 || globals.vsize==TWPNG_VS_FIT) {
if(globals.vsize==TWPNG_VS_1)
globals.vsize=TWPNG_VS_FIT;
else
globals.vsize=TWPNG_VS_1;
v->CalcStretchedSize();
InvalidateRect(hwnd,NULL,0);
}
return 0;
case WM_LBUTTONDOWN:
if(v->m_dragging) return 0;
if(!v->m_dib) return 0;
SetCapture(hwnd);
SetCursor(globals.hcurDrag2);
pts = MAKEPOINTS(lParam);
v->m_dragstart_x = v->m_imgpos_x - pts.x;
v->m_dragstart_y = v->m_imgpos_y - pts.y;
v->m_dragging = 1;
return 0;
case WM_LBUTTONUP:
SetCapture(NULL);
v->m_dragging=0;
return 0;
case WM_MOUSEMOVE:
if(v->m_dragging) {
pts = MAKEPOINTS(lParam);
v->m_imgpos_x = v->m_dragstart_x + pts.x;
v->m_imgpos_y = v->m_dragstart_y + pts.y;
InvalidateRect(hwnd,NULL,TRUE);
}
return 0;
case WM_KEYDOWN:
if(v->HandleKeyDown(hwnd,wParam,lParam)) {
return 0;
}
break;
case WM_CLOSE: // The user clicked the [x] for the window.
globals.autoopen_viewer=0;
break; // DefWindowProc will send a WM_DESTROY message
case WM_COMMAND:
id=LOWORD(wParam);
switch(id) {
case ID_CLOSE:
globals.autoopen_viewer=0;
DestroyWindow(hwnd);
return 0;
case ID_COPYIMAGE:
v->CopyImage();
return 0;
case ID_GAMMACORRECT:
globals.use_gamma = !globals.use_gamma;
v->UpdateViewerWindowTitle();
update_viewer();
return 0;
case ID_CORRECTNONSQUARE:
globals.viewer_correct_nonsquare = !globals.viewer_correct_nonsquare;
update_viewer();
return 0;
case ID_BG_CUSTOM:
globals.use_imagebg = 0;
globals.use_custombg = 1;
v->UpdateViewerWindowTitle();
update_viewer();
return 0;
case ID_BG_IMAGEORCUSTOM:
globals.use_imagebg = 1;
globals.use_custombg = 1;
v->UpdateViewerWindowTitle();
update_viewer();
return 0;
case ID_BG_STRIPALPHA:
globals.use_imagebg = 0;
globals.use_custombg = 0;
v->UpdateViewerWindowTitle();
update_viewer();
return 0;
case ID_WBG_SAMEASIMAGE:
globals.window_bgcolor = TWPNG_WBG_SAMEASIMAGE;
InvalidateRect(hwnd,NULL,0);
break;
case ID_WBG_SYSDEFAULT:
globals.window_bgcolor = TWPNG_WBG_SYSDEFAULT;
InvalidateRect(hwnd,NULL,0);
break;
case ID_WBG_CUSTOM:
globals.window_bgcolor = TWPNG_WBG_CUSTOM;
InvalidateRect(hwnd,NULL,0);
break;
case ID_SETBG:
{
unsigned char tmpr,tmpg,tmpb;
tmpr=GetRValue(globals.custombgcolor);
tmpg=GetGValue(globals.custombgcolor);
tmpb=GetBValue(globals.custombgcolor);
if(choose_color_dialog(hwnd,&tmpr,&tmpg,&tmpb)) {
globals.custombgcolor = RGB(tmpr,tmpg,tmpb);
update_viewer();
}
return 0;
}
case ID_ZOOM_FIT:
globals.vsize=TWPNG_VS_FIT;
goto rezoom;
case ID_ZOOM_1_8:
globals.vsize=TWPNG_VS_1_8;
goto rezoom;
case ID_ZOOM_1_4:
globals.vsize=TWPNG_VS_1_4;
goto rezoom;
case ID_ZOOM_1_2:
globals.vsize=TWPNG_VS_1_2;
goto rezoom;
case ID_ZOOM_2:
globals.vsize=TWPNG_VS_2;
goto rezoom;
case ID_ZOOM_4:
globals.vsize=TWPNG_VS_4;
goto rezoom;
//case ID_ZOOM_8: globals.vsize=TWPNG_VS_8; goto rezoom;
case ID_ZOOM_1:
globals.vsize=TWPNG_VS_1;
rezoom:
v->CalcStretchedSize();
InvalidateRect(hwnd,NULL,0);
break;
}
}
exit1:
return DefWindowProc(hwnd, msg, wParam, lParam);
}
