63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
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#include "precomp.h"
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#include <oprahcom.h>
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/* C E N T E R W I N D O W */
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/*-------------------------------------------------------------------------
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%%Function: CenterWindow
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Center a window over another window.
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-------------------------------------------------------------------------*/
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VOID NMINTERNAL CenterWindow(HWND hwndChild, HWND hwndParent)
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{
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int xNew, yNew;
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int cxChild, cyChild;
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int cxParent, cyParent;
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int cxScreen, cyScreen;
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RECT rcChild, rcParent, rcScrn;
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// Get the Height and Width of the child window
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GetWindowRect(hwndChild, &rcChild);
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cxChild = rcChild.right - rcChild.left;
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cyChild = rcChild.bottom - rcChild.top;
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// Get the display limits
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GetWindowRect(GetDesktopWindow(), &rcScrn);
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cxScreen = rcScrn.right - rcScrn.left;
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cyScreen = rcScrn.bottom - rcScrn.top;
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if(hwndParent != NULL )
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{
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// Get the Height and Width of the parent window
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GetWindowRect(hwndParent, &rcParent);
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cxParent = rcParent.right - rcParent.left;
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cyParent = rcParent.bottom - rcParent.top;
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}
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else
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{
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// No parent - center on desktop
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cxParent = cxScreen;
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cyParent = cyScreen;
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SetRect(&rcParent, 0, 0, cxScreen, cyScreen);
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}
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// Calculate new X position, then adjust for screen
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xNew = rcParent.left + ((cxParent - cxChild) / 2);
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if (xNew < 0)
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xNew = 0;
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else if ((xNew + cxChild) > cxScreen)
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xNew = cxScreen - cxChild;
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// Calculate new Y position, then adjust for screen
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yNew = rcParent.top + ((cyParent - cyChild) / 2);
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if (yNew < 0)
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yNew = 0;
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else if ((yNew + cyChild) > cyScreen)
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yNew = cyScreen - cyChild;
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SetWindowPos(hwndChild, NULL, xNew, yNew, 0, 0,
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SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);
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}
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