center_window
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center_window [2011/12/12 06:57] (current) |
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| + | ====== Center a window or dialog ====== | ||
| + | |||
| + | It looks sometimes much better, if a new modal dialog or window is centered to his parent. This function solves this for you. just call ''CenterWindow (hwndChild, hwndParent);''. | ||
| + | |||
| + | <code c>BOOL CenterWindow(HWND hwndChild, HWND hwndParent) | ||
| + | { | ||
| + | RECT rcChild, rcParent; | ||
| + | int cxChild, cyChild, cxParent, cyParent; | ||
| + | int cxScreen, cyScreen, xNew, yNew; | ||
| + | HDC hdc; | ||
| + | |||
| + | GetWindowRect(hwndChild, &rcChild); | ||
| + | cxChild = rcChild.right - rcChild.left; | ||
| + | cyChild = rcChild.bottom - rcChild.top; | ||
| + | |||
| + | GetWindowRect(hwndParent, &rcParent); | ||
| + | cxParent = rcParent.right - rcParent.left; | ||
| + | cyParent = rcParent.bottom - rcParent.top; | ||
| + | |||
| + | hdc = GetDC(hwndChild); | ||
| + | cxScreen = GetDeviceCaps(hdc, HORZRES); | ||
| + | cyScreen = GetDeviceCaps(hdc, VERTRES); | ||
| + | ReleaseDC(hwndChild, hdc); | ||
| + | |||
| + | xNew = rcParent.left + ((cxParent - cxChild) / 2); | ||
| + | if (xNew < 0) | ||
| + | { | ||
| + | xNew = 0; | ||
| + | } | ||
| + | else if ((xNew + cxChild) > cxScreen) | ||
| + | { | ||
| + | xNew = cxScreen - cxChild; | ||
| + | } | ||
| + | |||
| + | yNew = rcParent.top + ((cyParent - cyChild) / 2); | ||
| + | if (yNew < 0) | ||
| + | { | ||
| + | yNew = 0; | ||
| + | } | ||
| + | else if ((yNew + cyChild) > cyScreen) | ||
| + | { | ||
| + | yNew = cyScreen - cyChild; | ||
| + | } | ||
| + | |||
| + | return SetWindowPos(hwndChild, | ||
| + | NULL, | ||
| + | xNew, yNew, | ||
| + | 0, 0, | ||
| + | SWP_NOSIZE | SWP_NOZORDER); | ||
| + | }</code> | ||
center_window.txt ยท Last modified: 2011/12/12 06:57 by crl
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