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From: time@tbomb.ice.com (Tim Endres)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Remembering window locations
Message-ID: <1CE00001.40bylu@tbomb.ice.com>
Date: 19 Jan 91 22:30:24 GMT
Reply-To: time@ice.com
Organization: ICE Engineering, Inc.
Lines: 104
X-Mailer: uAccess - Mac Release: 1.0.5+


In article <cbaE5X_00WBN44j0tK@andrew.cmu.edu>, es1o+@andrew.cmu.edu (Eric Mitchell Snider) writes:
> I need some advice on how to save window locations (so the window will
> appear where the user left it when they run the program again...) and
> intelligently make them appear.  I have no problems with saving the
> locations of windows.  The problem I'm having is I don't know how to
> check if the window will appear on the screen.  Suppose someone with a
> big monitor drags the window way into the lower right corner.  If
> someone else with a small screen runs the program and it tries to
> display the window, they may not be able to see it...  How can I deal
> with this?  I need to be able to check if the window was saved in a
> valid location.

This is very similar to examples from Apple. Call it in good health.
tim.
----------------

DoCheckWindowRect(windRect, check_size)
Rect		*windRect;
int			check_size;	/* != 0 if you want the size reduced to fit screen. */
{
Rect		wrect, thesect, titlerect, screenrect;
GDHandle	dom_gdev, this_gdev;
long		sect_area, greatest_area;
int			bias, title_on_screen;
int			sect_flag;

	titlerect = *windRect;
	titlerect.bottom = titlerect.top;
	titlerect.top -= 20;

	wrect = *windRect;
	if (wrect.bottom == wrect.top)		/* Catch titlized windows */
		wrect.top--;
	
	if (GLOBAL_VARIABLE(theEnviron).hasColorQD) {
		
		dom_gdev = this_gdev = GetDeviceList();
		greatest_area = 0;
		title_on_screen = 0;
		
		for (; this_gdev != (GDHandle)0; this_gdev=GetNextDevice(this_gdev)) {
			if (TestDeviceAttribute(this_gdev, screenDevice)) {
				if (TestDeviceAttribute(this_gdev, screenActive)) {
					sect_flag = SectRect(&wrect, &(**this_gdev).gdRect, &thesect);
					sect_area = (long)(thesect.right - thesect.left) *
									(long)(thesect.bottom - thesect.top);
					if (sect_area > greatest_area) {
						greatest_area = sect_area;
						dom_gdev = this_gdev;
						}
					
					if (SectRect(&titlerect, &(**this_gdev).gdRect, &thesect)) 
						title_on_screen = 1;
					
					} /* screenActive */
				} /* screenDevice */
			} /* for */
		
		if (dom_gdev = GetMainDevice())
			bias = GetMBarHeight();
		
		screenrect = (**dom_gdev).gdRect;
		
		if (greatest_area == 0) {	/* Not on ANY screen! */
			OffsetRect(windRect, - ( windRect->left - screenrect.left),
								 - ( windRect->top - (screenrect.top + bias)) );
			OffsetRect(windRect, 10, 20);
			}
		else if (! title_on_screen) {
			OffsetRect(windRect, 0,
							- ( windRect->top - (screenrect.top + bias) ) );
			OffsetRect(windRect, 10, 20);
			}
		}
	else {
		bias = GetMBarHeight();
		screenrect = scrnrect;
		if (! SectRect(&wrect, &screenrect, &thesect)) {
			OffsetRect(windRect, - ( windRect->left - screenrect.left),
								 - ( windRect->top - screenrect.top + bias) );
			OffsetRect(windRect, 10, 20);
			}
		else if (! SectRect(&titlerect, &screenrect, &thesect)) {
			OffsetRect(windRect, 0,
							- ( windRect->top - screenrect.top + bias) );
			OffsetRect(windRect, 10, 20);
			}
		
		}
	
	if (check_size) {
		if ((windRect->bottom - windRect->top) > (screenrect.bottom - screenrect.top))
			windRect->bottom = (windRect->top + (screenrect.bottom - screenrect.top)) - bias;
		if ((windRect->right - windRect->left) > (screenrect.right - screenrect.left))
			windRect->right = (windRect->left + (screenrect.right - screenrect.left)) - bias;
		}
	
	}

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