42 lines
986 B
C++
42 lines
986 B
C++
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#include <stdio.h>
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#include <stdlib.h>
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#include "Misc.h"
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namespace W32Util
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{
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void CenterWindow(HWND hwnd)
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{
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HWND hwndParent;
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RECT rect, rectP;
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int width, height;
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int screenwidth, screenheight;
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int x, y;
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// make the window relative to its parent
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hwndParent = GetParent(hwnd);
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if (!hwndParent)
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return;
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GetWindowRect(hwnd, &rect);
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GetWindowRect(hwndParent, &rectP);
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width = rect.right - rect.left;
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height = rect.bottom - rect.top;
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x = ((rectP.right-rectP.left) - width) / 2 + rectP.left;
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y = ((rectP.bottom-rectP.top) - height) / 2 + rectP.top;
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screenwidth = GetSystemMetrics(SM_CXSCREEN);
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screenheight = GetSystemMetrics(SM_CYSCREEN);
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// make sure that the dialog box never moves outside of
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// the screen
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if (x < 0) x = 0;
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if (y < 0) y = 0;
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if (x + width > screenwidth) x = screenwidth - width;
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if (y + height > screenheight) y = screenheight - height;
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MoveWindow(hwnd, x, y, width, height, FALSE);
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}
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}
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