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- /*
- File: MyDeviceLoop.c
-
- Contains: This snippet shows how to write a device loop that
- works under System 7 and pre-7.0 systems. As
- described on pages 21-23 and 21-24 of Inside Mac
- volume VI, a device loop procedure searches all
- active screen devices, calling a drawing procedure
- whenever it encounters a screen that intersects
- the drawing region. In this app the drawing
- region is the app's window bounds and the chosen
- drawing procedure simply displays the screen's
- colors for every device the window bounds intersect.
-
- Written by: EL
-
- Copyright: Copyright © 1992-1999 by Apple Computer, Inc., All Rights Reserved.
-
- You may incorporate this Apple sample source code into your program(s) without
- restriction. This Apple sample source code has been provided "AS IS" and the
- responsibility for its operation is yours. You are not permitted to redistribute
- this Apple sample source code as "Apple sample source code" after having made
- changes. If you're going to re-distribute the source, we require that you make
- it clear in the source that the code was descended from Apple sample source
- code, but that you've made changes.
-
- Change History (most recent first):
- 08/2000 JM Carbonized, non-Carbon code is commented out
- for demonstration purposes.
- 7/12/1999 KG Updated for Metrowerks Codewarror Pro 2.1
-
-
- */
- #include "CarbonPrefix.h"
- #include <Dialogs.h>
- #include <Fonts.h>
-
- /* Constant Declarations */
-
- #define WWIDTH 400
- #define WHEIGHT 256
-
- //#define WLEFT (((qd.screenBits.bounds.right - qd.screenBits.bounds.left) - WWIDTH) / 2)
- //#define WTOP (((qd.screenBits.bounds.bottom - qd.screenBits.bounds.top) - WHEIGHT) / 2)
-
-
- enum PointSelector {topLeft,
- botRight};
- /* Global Variable Definitions */
-
- WindowPtr gWindow;
-
- void initMac();
- void createWindow();
- void doMyDeviceLoop();
- void doDraw();
- void doEventLoop();
-
- void main(void)
- {
- initMac();
-
- createWindow();
-
- doEventLoop();
- }
-
- void initMac()
- {
- /*MaxApplZone();
-
- InitGraf( &qd.thePort );
- InitFonts();
- InitWindows();
- InitMenus();
- TEInit();
- InitDialogs( nil );*/
- InitCursor();
- FlushEvents( 0, everyEvent );
- }
-
- void createWindow()
- {
- Rect rect;
-
- BitMap bitMap;
- int top, left;
-
- GetQDGlobalsScreenBits(&bitMap);
-
- top = (((bitMap.bounds.bottom - bitMap.bounds.top) - WHEIGHT) / 2);
- left = (((bitMap.bounds.right - bitMap.bounds.left) - WWIDTH) / 2);
-
- //SetRect( &rect, WLEFT, WTOP, WLEFT + WWIDTH, WTOP + WHEIGHT );
- SetRect( &rect, left, top, left + WWIDTH, top + WHEIGHT );
-
- gWindow = NewCWindow( 0L, &rect, "\pMyDeviceLoop", true, documentProc,
- (WindowPtr)-1L, true, 0L );
- //SetPort( gWindow );
- SetPortWindowPort( gWindow );
-
- TextFont( kFontIDTimes );
- TextSize( 48 );
- TextMode( srcCopy );
- }
-
-
- // Old version of doMyDeviceLoop, new version capable of supporting multiple monitors
- /*
- void doMyDeviceLoop()
- {
- int depth;
- Rect gDeviceRect;
- Rect intersectingRect;
- GDHandle gDevice;
- //Point point;
- Rect tempRect1;
-
- // Get the handle to the first device in the list.
- gDevice = GetDeviceList();
-
- // Loop through all the devices in the list.
- while (gDevice != nil)
- {
- // Get the device's gdRect and convert it to local coordinates.
- gDeviceRect = (**gDevice).gdRect;
- depth = (**(**gDevice).gdPMap).pixelSize;
-
- GlobalToLocal( topLeft );
- GlobalToLocal( (Point *)botRight );
-
- // Check if the app's window rect intersects the device's, and if it
- // does, set the clip region's rect to the intersection, then DRAW!
-
- //if (SectRect( &gWindow->portRect, &gDeviceRect, &intersectingRect ))
- if (SectRect( GetPortBounds(GetWindowPort(gWindow), &tempRect1), &gDeviceRect, &intersectingRect ))
- {
- ClipRect( &intersectingRect );
- doDraw( depth, &intersectingRect );
- }
-
- // Get the next device in the list.
- gDevice = GetNextDevice( gDevice );
- }
- }
- */
-
- // New doMyDeviceLoop, now works with multiple monitors
- void doMyDeviceLoop()
- {
- int depth;
- Rect gDeviceRect;
- Rect intersectingRect;
- GDHandle gDevice;
- //WindowRecord *windowRec = (WindowRecord *)gWindow;
- WindowPtr windowRec = gWindow;
- Rect windowRect; //= (**windowRec->contRgn).rgnBBox;
- RgnHandle rgnHandle = NewRgn();
-
- GetWindowRegion(windowRec, kWindowContentRgn, rgnHandle);
- GetRegionBounds(rgnHandle, &windowRect);
-
- // Get the handle to the first device in the list.
- gDevice = GetDeviceList();
-
- // Loop through all the devices in the list.
- while (gDevice != nil)
- {
- // Get the device's gdRect */
- gDeviceRect = (**gDevice).gdRect;
- depth = (**(**gDevice).gdPMap).pixelSize;
-
- // Check if the app's window rect intersects the device's, and if it
- // does, set the clip region's rect to the intersection, then DRAW!
- if (SectRect( &windowRect, &gDeviceRect, &intersectingRect ))
- {
- // The intersectingRect is in global coords. Convert to local
- GlobalToLocal((Point *)&intersectingRect.top);
- GlobalToLocal((Point *)&intersectingRect.bottom);
-
- ClipRect( &intersectingRect );
- doDraw( depth, &intersectingRect );
- }
-
- // Get the next device in the list.
- gDevice = GetNextDevice( gDevice );
- }
-
- DisposeRgn(rgnHandle);
- }
-
-
- void doDraw( depth)
- int depth;
- {
- int i;
- int totalColors;
- int penThickness;
- //RGBColor color;
- CTabHandle ctable;
- Str255 string = "\pDirect Colors";
- Rect tempRect1;
-
- if (depth > 8)
- {
- BackColor( blackColor );
- ForeColor( blueColor );
-
- /* Draw text for direct colors mode. */
- //EraseRect( &gWindow->portRect );
- EraseRect( GetPortBounds(GetWindowPort(gWindow), &tempRect1));
- //MoveTo( (gWindow->portRect.right - StringWidth( string )) / 2, 130 );
- MoveTo((GetPortBounds(GetWindowPort(gWindow), &tempRect1)->right - StringWidth(string)) / 2, 130);
- DrawString( string );
- }
- else
- {
- /* Get the colortable at this depth. */
- ctable = GetCTable( depth );
-
- /* Set the line thickness to a fraction of the window height. */
- totalColors = (2 << depth) / 2;
- //penThickness = gWindow->portRect.bottom / totalColors;
- penThickness = GetPortBounds(GetWindowPort(gWindow), &tempRect1)->bottom / totalColors;
- PenSize( 1, penThickness );
-
- /* Now draw the colors at this depth. */
- for (i = 0; i < totalColors; i++)
- {
- RGBForeColor( &(**ctable).ctTable[i].rgb );
- MoveTo( 0, i * penThickness );
- //LineTo( gWindow->portRect.right, i * penThickness );
- LineTo(GetPortBounds(GetWindowPort(gWindow), &tempRect1)->right, i * penThickness);
- }
-
- /* Release the colortable memory. */
- DisposeCTable( ctable );
- }
- }
-
- void doEventLoop()
- {
- EventRecord event;
- WindowPtr window;
- short clickArea;
- Rect screenRect;
-
- for (;;)
- {
- if (WaitNextEvent( everyEvent, &event, 0, nil ))
- {
- if (event.what == mouseDown)
- {
- clickArea = FindWindow( event.where, &window );
-
- if (clickArea == inDrag)
- {
- //screenRect = (**GetGrayRgn()).rgnBBox;
- GetRegionBounds(GetGrayRgn(), &screenRect);
- DragWindow( window, event.where, &screenRect );
- }
- else if (clickArea == inContent)
- {
- if (window != FrontWindow())
- SelectWindow( window );
- }
- else if (clickArea == inGoAway)
- if (TrackGoAway( window, event.where ))
- return;
- }
- else if (event.what == updateEvt)
- {
- window = (WindowPtr)event.message;
- //SetPort( window );
- SetPortWindowPort( window );
-
- BeginUpdate( window );
- doMyDeviceLoop();
- EndUpdate( window );
- }
- }
- }
- }