* and the window rect from the client area given the style of the window
* (or a valid window pointer from which the style can be queried).
*/
-extern RECT fghGetClientArea( const SFG_Window *window, BOOL wantPosOutside );
-extern void fghGetBorderWidth(const DWORD windowStyle, int* xBorderWidth, int* yBorderWidth);
+extern void fghGetClientArea( RECT *clientRect, const SFG_Window *window, BOOL wantPosOutside );
+extern void fghGetStyleFromWindow( const SFG_Window *window, DWORD *windowStyle, DWORD *windowExStyle );
+extern void fghComputeWindowRectFromClientArea_UseStyle( RECT *clientRect, const DWORD windowStyle, const DWORD windowExStyle, BOOL posIsOutside );
/* The following include file is available from SGI but is not standard:
* behaviour, both under Windows and under UNIX/X11:
* - When you create a window with position (x,y) and size
* (w,h), the upper left hand corner of the outside of the
- * window is at (x,y) and the size of the drawable area is
+ * window is at (x,y) and the size of the drawable area is
* (w,h).
* - When you query the size and position of the window--as
* is happening here for Windows--"freeglut" will return
#if defined(_WIN32_WCE)
GetWindowRect( fgStructure.CurrentWindow->Window.Handle, &winRect );
#else
- winRect = fghGetClientArea(fgStructure.CurrentWindow, FALSE);
+ fghGetClientArea(&winRect,fgStructure.CurrentWindow, FALSE);
if (fgStructure.CurrentWindow->Parent && (eWhat==GLUT_WINDOW_X || eWhat==GLUT_WINDOW_Y))
{
/* For child window, we should return relative to upper-left
return 0;
#else
{
- DWORD windowStyle;
-
+ /* We can't get the border width or header height in the simple way
+ * with some calls to GetSystemMetrics. We'd then have to assume which
+ * elements are present for a given decoration, and such calculations
+ * wouldn't be valid for every version of Windows. The below should be
+ * robust. */
+ int borderWidth, captionHeight;
+ DWORD windowStyle, windowExStyle;
+ RECT clientRect, winRect;
+
+ /* Get style of window, or default style */
+ fghGetStyleFromWindow( fgStructure.CurrentWindow, &windowStyle, &windowExStyle );
+ /* Get client area if any window */
if (fgStructure.CurrentWindow && fgStructure.CurrentWindow->Window.Handle)
- windowStyle = GetWindowLong(fgStructure.CurrentWindow->Window.Handle, GWL_STYLE);
+ fghGetClientArea(&clientRect,fgStructure.CurrentWindow,FALSE);
else
- /* If no window, return sizes for a default window with title bar and border */
- windowStyle = WS_OVERLAPPEDWINDOW;
+ SetRect(&clientRect,0,0,200,200);
+
+ /* Compute window rect (including non-client area) */
+ CopyRect(&winRect,&clientRect);
+ fghComputeWindowRectFromClientArea_UseStyle(&winRect,windowStyle,windowExStyle,FALSE);
+
+ /* Calculate border width by taking width of whole window minus width of client area and divide by two
+ * NB: we assume horizontal and vertical borders have the same size, which should always be the case
+ * unless the user bypassed FreeGLUT and messed with the windowstyle himself.
+ * Once borderwidth is known, account for it when comparing height of window to height of client area.
+ * all other extra pixels are assumed to be atop the window, forming the caption.
+ */
+ borderWidth = ((winRect.right-winRect.left)-(clientRect.right-clientRect.left))/2;
+ captionHeight = (winRect.bottom-winRect.top)-(clientRect.bottom-clientRect.top)-borderWidth*2;
switch( eWhat )
{
case GLUT_WINDOW_BORDER_WIDTH:
{
- int xBorderWidth, yBorderWidth;
- fghGetBorderWidth(windowStyle, &xBorderWidth, &yBorderWidth);
- return xBorderWidth;
+ return borderWidth;
}
case GLUT_WINDOW_HEADER_HEIGHT:
/* Need to query for WS_MAXIMIZEBOX to see if we have a title bar, the WS_CAPTION query is also true for a WS_DLGFRAME only... */
- return (windowStyle & WS_MAXIMIZEBOX)? GetSystemMetrics( SM_CYCAPTION ) : 0;
+ return captionHeight;
}
}
#endif /* defined(_WIN32_WCE) */
}
-/* Returns the width of the window borders based on the window's style.
-*/
-void fghGetBorderWidth(const DWORD windowStyle, int* xBorderWidth, int* yBorderWidth)
+/* Get window style and extended window style of a FreeGLUT window
+ * If the window pointer or the window handle is NULL, a fully
+ * decorated window (caption and border) is assumed.
+ */
+void fghGetStyleFromWindow( const SFG_Window *window, DWORD *windowStyle, DWORD *windowExStyle )
{
- if (windowStyle & WS_THICKFRAME)
- {
- *xBorderWidth = GetSystemMetrics(SM_CXSIZEFRAME);
- *yBorderWidth = GetSystemMetrics(SM_CYSIZEFRAME);
- }
- else if (windowStyle & WS_DLGFRAME)
+ if (window && window->Window.Handle)
{
- *xBorderWidth = GetSystemMetrics(SM_CXFIXEDFRAME);
- *yBorderWidth = GetSystemMetrics(SM_CYFIXEDFRAME);
+ *windowStyle = GetWindowLong(window->Window.Handle, GWL_STYLE);
+ *windowExStyle = GetWindowLong(window->Window.Handle, GWL_EXSTYLE);
}
else
{
- *xBorderWidth = 0;
- *yBorderWidth = 0;
+ /* WindowExStyle==0 is fine/default, exStyle is currently only used for menu windows */
+ *windowStyle = WS_OVERLAPPEDWINDOW;
+ *windowExStyle = 0;
}
}
-
/* Computes position of corners of window Rect (outer position including
* decorations) based on the provided client rect and based on the style
* of the window in question.
* (rect.right-rect.left,rect.bottom-rect.top) is the size of the drawable
* area.
*/
-void fghComputeWindowRectFromClientArea_UseStyle( const DWORD windowStyle, RECT *clientRect, BOOL posIsOutside )
+void fghComputeWindowRectFromClientArea_UseStyle( RECT *clientRect, const DWORD windowStyle, const DWORD windowExStyle, BOOL posIsOutside )
{
- int xBorderWidth = 0, yBorderWidth = 0;
+ RECT windowRect = {0,0,0,0};
+ CopyRect(&windowRect,clientRect);
- /* If window has title bar, correct rect for it */
- if (windowStyle & WS_MAXIMIZEBOX) /* Need to query for WS_MAXIMIZEBOX to see if we have a title bar, the WS_CAPTION query is also true for a WS_DLGFRAME only... */
- {
- if (posIsOutside)
- clientRect->bottom += GetSystemMetrics( SM_CYCAPTION );
- else
- clientRect->top -= GetSystemMetrics( SM_CYCAPTION );
- }
+ /* Get rect including non-client area */
+ AdjustWindowRectEx(&windowRect,windowStyle,FALSE,windowExStyle);
- /* get width of window's borders (frame), correct rect for it.
- * Note, borders can be of zero width if style does not specify borders
- */
- fghGetBorderWidth(windowStyle, &xBorderWidth, &yBorderWidth);
+ /* Move window right and down by non-client area extent on left and top, if wanted */
if (posIsOutside)
{
- clientRect->right += xBorderWidth * 2;
- clientRect->bottom += yBorderWidth * 2;
- }
- else
- {
- clientRect->left -= xBorderWidth;
- clientRect->right += xBorderWidth;
- clientRect->top -= yBorderWidth;
- clientRect->bottom += yBorderWidth;
+ windowRect.right += clientRect->left-windowRect.left;
+ windowRect.bottom += clientRect->top -windowRect.top;
+ windowRect.left = clientRect->left;
+ windowRect.top = clientRect->top;
}
+
+ /* done, copy windowRect to output */
+ CopyRect(clientRect,&windowRect);
}
/* Computes position of corners of window Rect (outer position including
* (rect.right-rect.left,rect.bottom-rect.top) is the size of the drawable
* area.
*/
-void fghComputeWindowRectFromClientArea_QueryWindow( const SFG_Window *window, RECT *clientRect, BOOL posIsOutside )
+void fghComputeWindowRectFromClientArea_QueryWindow( RECT *clientRect, const SFG_Window *window, BOOL posIsOutside )
{
- DWORD windowStyle = 0;
-
- if (window && window->Window.Handle)
- windowStyle = GetWindowLong(window->Window.Handle, GWL_STYLE);
- else
- windowStyle = WS_OVERLAPPEDWINDOW;
+ DWORD windowStyle = 0, windowExStyle = 0;
+ fghGetStyleFromWindow(window,&windowStyle,&windowExStyle);
- fghComputeWindowRectFromClientArea_UseStyle(windowStyle, clientRect, posIsOutside);
+ fghComputeWindowRectFromClientArea_UseStyle(clientRect, windowStyle, windowExStyle, posIsOutside);
}
-/* Computes position of corners of client area (drawable area) of a window
- * based on the provided window Rect (outer position including decorations)
- * and based on the style of the window in question. If the window pointer
- * or the window handle is NULL, a fully decorated window (caption and
- * border) is assumed.
- * Furthermore, if wantPosOutside is set to true, the output client Rect
- * will follow freeGLUT's window specification convention in which the
- * top-left corner is at the outside of the window, the size
- * (rect.right-rect.left,rect.bottom-rect.top) is the size of the drawable
- * area.
- */
-void fghComputeClientAreaFromWindowRect( const SFG_Window *window, RECT *windowRect, BOOL wantPosOutside )
-{
- DWORD windowStyle = 0;
- int xBorderWidth = 0, yBorderWidth = 0;
-
- if (window && window->Window.Handle)
- windowStyle = GetWindowLong(window->Window.Handle, GWL_STYLE);
- else
- windowStyle = WS_OVERLAPPEDWINDOW;
-
- /* If window has title bar, correct rect for it */
- if (windowStyle & WS_MAXIMIZEBOX) /* Need to query for WS_MAXIMIZEBOX to see if we have a title bar, the WS_CAPTION query is also true for a WS_DLGFRAME only... */
- {
- if (wantPosOutside)
- windowRect->bottom -= GetSystemMetrics( SM_CYCAPTION );
- else
- windowRect->top += GetSystemMetrics( SM_CYCAPTION );
- }
-
- /* get width of window's borders (frame), correct rect for it.
- * Note, borders can be of zero width if style does not specify borders
- */
- fghGetBorderWidth(windowStyle, &xBorderWidth, &yBorderWidth);
- if (wantPosOutside)
- {
- windowRect->right -= xBorderWidth * 2;
- windowRect->bottom -= yBorderWidth * 2;
- }
- else
- {
- windowRect->left += xBorderWidth;
- windowRect->right -= xBorderWidth;
- windowRect->top += yBorderWidth;
- windowRect->bottom -= yBorderWidth;
- }
-}
/* Gets the rect describing the client area (drawable area) of the
- * specified window.
+ * specified window. Output is position of corners of client area (drawable area) on the screen.
* Returns an empty rect if window pointer or window handle is NULL.
* If wantPosOutside is set to true, the output client Rect
* will follow freeGLUT's window specification convention in which the
* (rect.right-rect.left,rect.bottom-rect.top) is the size of the drawable
* area.
*/
-RECT fghGetClientArea( const SFG_Window *window, BOOL wantPosOutside )
+void fghGetClientArea( RECT *clientRect, const SFG_Window *window, BOOL wantPosOutside )
{
- RECT windowRect = {0,0,0,0};
+ POINT topLeftClient = {0,0};
+ POINT topLeftWindow = {0,0};
- freeglut_return_val_if_fail((window && window->Window.Handle),windowRect);
+ freeglut_return_if_fail((window && window->Window.Handle));
/*
* call GetWindowRect()
* (this returns the pixel coordinates of the outside of the window)
- * cannot use GetClientRect as it seems to return a rect relative to
+ * cannot use GetClientRect as it returns a rect relative to
* the top-left point of the client area (.top and .left are thus always 0)
+ * and is thus only useful for querying the size of the client area, not
+ * its position.
*/
- GetWindowRect( window->Window.Handle, &windowRect );
-
- /* Then correct the results */
- fghComputeClientAreaFromWindowRect(window, &windowRect, wantPosOutside);
-
- return windowRect;
+ GetWindowRect( window->Window.Handle, clientRect );
+ topLeftWindow.x = clientRect->top;
+ topLeftWindow.y = clientRect->left;
+
+ /* Get size of client rect */
+ GetClientRect(window->Window.Handle, clientRect);
+ /* Get position of top-left of client area on the screen */
+ ClientToScreen(window->Window.Handle,&topLeftClient);
+ /* Add top-left offset */
+ OffsetRect(clientRect,topLeftClient.x,topLeftClient.y);
+
+ /* replace top and left with top and left of window, if wanted */
+ if (wantPosOutside)
+ {
+ clientRect->left = topLeftWindow.x;
+ clientRect->top = topLeftWindow.y;
+ }
}
#if(WINVER >= 0x500)
windowRect.right = x+w;
windowRect.bottom = y+h;
- fghComputeWindowRectFromClientArea_UseStyle(flags,&windowRect,TRUE);
+ fghComputeWindowRectFromClientArea_UseStyle(&windowRect,flags,exFlags,TRUE);
+ /* NB: w and h are now width and height of window including non-client area! */
w = windowRect.right - windowRect.left;
h = windowRect.bottom- windowRect.top;
}
projects / freeglut / commitdiff