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reimplemented the client-area/window-area conversion code. It should now

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be robust across Windows and Visual Studio versions. Bugs in window
size with VS2012 fixed!


git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@1394 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
dcnieho 2012-11-16 11:02:06 +00:00
parent 9241bedc2f
commit 0500cfdf4c
5 changed files with 107 additions and 131 deletions
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12
freeglut/freeglut/progs/demos/Resizer/Resizer.cpp
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@ -220,13 +220,19 @@ void Redisplay(void)
int main(int argc, char* argv[]) int main(int argc, char* argv[])
{ {
int border, caption;
glutInit( &argc, argv ); glutInit( &argc, argv );
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE /*| GLUT_BORDERLESS*/); // do try as well with GLUT_BORDERLESS and GLUT_CAPTIONLESS glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE /*| GLUT_BORDERLESS*/); // do try as well with GLUT_BORDERLESS and GLUT_CAPTIONLESS
glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE,GLUT_ACTION_GLUTMAINLOOP_RETURNS); glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE,GLUT_ACTION_GLUTMAINLOOP_RETURNS);
/* Get border and caption size of default window style */
border = glutGet(GLUT_WINDOW_BORDER_WIDTH);
caption = glutGet(GLUT_WINDOW_HEADER_HEIGHT);
printf("default window style border: %dpx, caption: %dpx\n",border,caption);
/* The window position you request is the outer top-left of the window, /* NB: The window position you request is the outer top-left of the
* the client area is at a different position if the window has borders * window, the client area is at a different position if the window has
* and/or a title bar. * borders and/or a title bar.
*/ */
glutInitWindowPosition(150,250); glutInitWindowPosition(150,250);
glutInitWindowSize(200,200); glutInitWindowSize(200,200);

13
freeglut/freeglut/src/mswin/fg_main_mswin.c
View File

@ -63,8 +63,8 @@ struct GXKeyList gxKeyList;
* and the window rect from the client area given the style of the window * 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). * (or a valid window pointer from which the style can be queried).
*/ */
extern void fghComputeWindowRectFromClientArea_QueryWindow( const SFG_Window *window, RECT *clientRect, BOOL posIsOutside ); extern void fghComputeWindowRectFromClientArea_QueryWindow( RECT *clientRect, const SFG_Window *window, BOOL posIsOutside );
extern RECT fghGetClientArea ( const SFG_Window *window, BOOL wantPosOutside ); extern void fghGetClientArea ( RECT *clientRect, const SFG_Window *window, BOOL wantPosOutside );
void fgPlatformReshapeWindow ( SFG_Window *window, int width, int height ) void fgPlatformReshapeWindow ( SFG_Window *window, int width, int height )
@ -86,7 +86,7 @@ void fgPlatformReshapeWindow ( SFG_Window *window, int width, int height )
if (window->Parent == NULL) if (window->Parent == NULL)
/* get the window rect from this to feed to SetWindowPos, correct for window decorations */ /* get the window rect from this to feed to SetWindowPos, correct for window decorations */
fghComputeWindowRectFromClientArea_QueryWindow(window,&windowRect,TRUE); fghComputeWindowRectFromClientArea_QueryWindow(&windowRect,window,TRUE);
else else
{ {
/* correct rect for position client area of parent window /* correct rect for position client area of parent window
@ -96,11 +96,8 @@ void fgPlatformReshapeWindow ( SFG_Window *window, int width, int height )
* for them. * for them.
*/ */
RECT parentRect; RECT parentRect;
parentRect = fghGetClientArea( window->Parent, FALSE ); fghGetClientArea( &parentRect, window->Parent, FALSE );
windowRect.left -= parentRect.left; OffsetRect(&windowRect,-parentRect.left,-parentRect.top);
windowRect.right -= parentRect.left;
windowRect.top -= parentRect.top;
windowRect.bottom -= parentRect.top;
} }
/* Do the actual resizing */ /* Do the actual resizing */

11
freeglut/freeglut/src/mswin/fg_menu_mswin.c
View File

@ -29,7 +29,7 @@
#include <GL/freeglut.h> #include <GL/freeglut.h>
#include "../fg_internal.h" #include "../fg_internal.h"
extern RECT fghGetClientArea( const SFG_Window *window, BOOL wantPosOutside ); extern void fghGetClientArea( RECT *clientRect, const SFG_Window *window, BOOL wantPosOutside );
GLvoid fgPlatformGetGameModeVMaxExtent( SFG_Window* window, int* x, int* y ) GLvoid fgPlatformGetGameModeVMaxExtent( SFG_Window* window, int* x, int* y )
@ -69,11 +69,12 @@ void fgPlatformCheckMenuDeactivate()
else else
{ {
/* Check if focus lost because non-client area of /* Check if focus lost because non-client area of
* window was pressed (pressing on client area is * window was pressed (pressing on client area is
* handled in fgCheckActiveMenu) * handled in fgCheckActiveMenu)
*/ */
POINT mouse_pos; POINT mouse_pos;
RECT clientArea = fghGetClientArea(menu->ParentWindow, GL_FALSE); RECT clientArea;
fghGetClientArea(&clientArea,menu->ParentWindow, GL_FALSE);
GetCursorPos(&mouse_pos); GetCursorPos(&mouse_pos);
if ( !PtInRect( &clientArea, mouse_pos ) ) if ( !PtInRect( &clientArea, mouse_pos ) )
fgDeactivateMenu(menu->ParentWindow); fgDeactivateMenu(menu->ParentWindow);

45
freeglut/freeglut/src/mswin/fg_state_mswin.c
View File

@ -37,8 +37,9 @@ extern GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
* and the window rect from the client area given the style of the window * 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). * (or a valid window pointer from which the style can be queried).
*/ */
extern RECT fghGetClientArea( const SFG_Window *window, BOOL wantPosOutside ); extern void fghGetClientArea( RECT *clientRect, const SFG_Window *window, BOOL wantPosOutside );
extern void fghGetBorderWidth(const DWORD windowStyle, int* xBorderWidth, int* yBorderWidth); 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: /* The following include file is available from SGI but is not standard:
@ -165,7 +166,7 @@ int fgPlatformGlutGet ( GLenum eWhat )
* behaviour, both under Windows and under UNIX/X11: * behaviour, both under Windows and under UNIX/X11:
* - When you create a window with position (x,y) and size * - When you create a window with position (x,y) and size
* (w,h), the upper left hand corner of the outside of the * (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). * (w,h).
* - When you query the size and position of the window--as * - When you query the size and position of the window--as
* is happening here for Windows--"freeglut" will return * is happening here for Windows--"freeglut" will return
@ -182,7 +183,7 @@ int fgPlatformGlutGet ( GLenum eWhat )
#if defined(_WIN32_WCE) #if defined(_WIN32_WCE)
GetWindowRect( fgStructure.CurrentWindow->Window.Handle, &winRect ); GetWindowRect( fgStructure.CurrentWindow->Window.Handle, &winRect );
#else #else
winRect = fghGetClientArea(fgStructure.CurrentWindow, FALSE); fghGetClientArea(&winRect,fgStructure.CurrentWindow, FALSE);
if (fgStructure.CurrentWindow->Parent && (eWhat==GLUT_WINDOW_X || eWhat==GLUT_WINDOW_Y)) if (fgStructure.CurrentWindow->Parent && (eWhat==GLUT_WINDOW_X || eWhat==GLUT_WINDOW_Y))
{ {
/* For child window, we should return relative to upper-left /* For child window, we should return relative to upper-left
@ -214,25 +215,45 @@ int fgPlatformGlutGet ( GLenum eWhat )
return 0; return 0;
#else #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) if (fgStructure.CurrentWindow && fgStructure.CurrentWindow->Window.Handle)
windowStyle = GetWindowLong(fgStructure.CurrentWindow->Window.Handle, GWL_STYLE); fghGetClientArea(&clientRect,fgStructure.CurrentWindow,FALSE);
else else
/* If no window, return sizes for a default window with title bar and border */ SetRect(&clientRect,0,0,200,200);
windowStyle = WS_OVERLAPPEDWINDOW;
/* 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 ) switch( eWhat )
{ {
case GLUT_WINDOW_BORDER_WIDTH: case GLUT_WINDOW_BORDER_WIDTH:
{ {
int xBorderWidth, yBorderWidth; return borderWidth;
fghGetBorderWidth(windowStyle, &xBorderWidth, &yBorderWidth);
return xBorderWidth;
} }
case GLUT_WINDOW_HEADER_HEIGHT: 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... */ /* 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) */ #endif /* defined(_WIN32_WCE) */

157
freeglut/freeglut/src/mswin/fg_window_mswin.c
View File

@ -371,29 +371,26 @@ void fgPlatformSetWindow ( SFG_Window *window )
} }
/* Returns the width of the window borders based on the window's style. /* Get window style and extended window style of a FreeGLUT window
*/ * If the window pointer or the window handle is NULL, a fully
void fghGetBorderWidth(const DWORD windowStyle, int* xBorderWidth, int* yBorderWidth) * decorated window (caption and border) is assumed.
*/
void fghGetStyleFromWindow( const SFG_Window *window, DWORD *windowStyle, DWORD *windowExStyle )
{ {
if (windowStyle & WS_THICKFRAME) if (window && window->Window.Handle)
{ {
*xBorderWidth = GetSystemMetrics(SM_CXSIZEFRAME); *windowStyle = GetWindowLong(window->Window.Handle, GWL_STYLE);
*yBorderWidth = GetSystemMetrics(SM_CYSIZEFRAME); *windowExStyle = GetWindowLong(window->Window.Handle, GWL_EXSTYLE);
}
else if (windowStyle & WS_DLGFRAME)
{
*xBorderWidth = GetSystemMetrics(SM_CXFIXEDFRAME);
*yBorderWidth = GetSystemMetrics(SM_CYFIXEDFRAME);
} }
else else
{ {
*xBorderWidth = 0; /* WindowExStyle==0 is fine/default, exStyle is currently only used for menu windows */
*yBorderWidth = 0; *windowStyle = WS_OVERLAPPEDWINDOW;
*windowExStyle = 0;
} }
} }
/* Computes position of corners of window Rect (outer position including /* Computes position of corners of window Rect (outer position including
* decorations) based on the provided client rect and based on the style * decorations) based on the provided client rect and based on the style
* of the window in question. * of the window in question.
@ -403,35 +400,25 @@ void fghGetBorderWidth(const DWORD windowStyle, int* xBorderWidth, int* yBorderW
* (rect.right-rect.left,rect.bottom-rect.top) is the size of the drawable * (rect.right-rect.left,rect.bottom-rect.top) is the size of the drawable
* area. * 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 */ /* Get rect including non-client area */
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... */ AdjustWindowRectEx(&windowRect,windowStyle,FALSE,windowExStyle);
{
if (posIsOutside)
clientRect->bottom += GetSystemMetrics( SM_CYCAPTION );
else
clientRect->top -= GetSystemMetrics( SM_CYCAPTION );
}
/* get width of window's borders (frame), correct rect for it. /* Move window right and down by non-client area extent on left and top, if wanted */
* Note, borders can be of zero width if style does not specify borders
*/
fghGetBorderWidth(windowStyle, &xBorderWidth, &yBorderWidth);
if (posIsOutside) if (posIsOutside)
{ {
clientRect->right += xBorderWidth * 2; windowRect.right += clientRect->left-windowRect.left;
clientRect->bottom += yBorderWidth * 2; windowRect.bottom += clientRect->top -windowRect.top;
} windowRect.left = clientRect->left;
else windowRect.top = clientRect->top;
{
clientRect->left -= xBorderWidth;
clientRect->right += xBorderWidth;
clientRect->top -= yBorderWidth;
clientRect->bottom += yBorderWidth;
} }
/* done, copy windowRect to output */
CopyRect(clientRect,&windowRect);
} }
/* Computes position of corners of window Rect (outer position including /* Computes position of corners of window Rect (outer position including
@ -444,68 +431,17 @@ void fghComputeWindowRectFromClientArea_UseStyle( const DWORD windowStyle, RECT
* (rect.right-rect.left,rect.bottom-rect.top) is the size of the drawable * (rect.right-rect.left,rect.bottom-rect.top) is the size of the drawable
* area. * 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; DWORD windowStyle = 0, windowExStyle = 0;
fghGetStyleFromWindow(window,&windowStyle,&windowExStyle);
if (window && window->Window.Handle) fghComputeWindowRectFromClientArea_UseStyle(clientRect, windowStyle, windowExStyle, posIsOutside);
windowStyle = GetWindowLong(window->Window.Handle, GWL_STYLE);
else
windowStyle = WS_OVERLAPPEDWINDOW;
fghComputeWindowRectFromClientArea_UseStyle(windowStyle, clientRect, 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 /* 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. * Returns an empty rect if window pointer or window handle is NULL.
* If wantPosOutside is set to true, the output client Rect * If wantPosOutside is set to true, the output client Rect
* will follow freeGLUT's window specification convention in which the * will follow freeGLUT's window specification convention in which the
@ -513,24 +449,38 @@ void fghComputeClientAreaFromWindowRect( const SFG_Window *window, RECT *windowR
* (rect.right-rect.left,rect.bottom-rect.top) is the size of the drawable * (rect.right-rect.left,rect.bottom-rect.top) is the size of the drawable
* area. * 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() * call GetWindowRect()
* (this returns the pixel coordinates of the outside of the window) * (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) * 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 ); 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);
/* Then correct the results */ /* replace top and left with top and left of window, if wanted */
fghComputeClientAreaFromWindowRect(window, &windowRect, wantPosOutside); if (wantPosOutside)
{
return windowRect; clientRect->left = topLeftWindow.x;
clientRect->top = topLeftWindow.y;
}
} }
#if(WINVER >= 0x500) #if(WINVER >= 0x500)
@ -724,8 +674,9 @@ void fgPlatformOpenWindow( SFG_Window* window, const char* title,
windowRect.right = x+w; windowRect.right = x+w;
windowRect.bottom = y+h; 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; w = windowRect.right - windowRect.left;
h = windowRect.bottom- windowRect.top; h = windowRect.bottom- windowRect.top;
} }