setting EWM (extended window manager) hints via Qt4 (X11)

[Chicken Blood Machine]

Actually, if you have problems with that, I've just found some code I implemented a long time ago when using Qt3. It created a non-resizable border for dialogs (now not required in Qt4 as it is done automatically). If you modify this to set your specific EWM hints, it should work:

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
 
#include <QX11Info>
 
void MyWidget::callIfWidgetIsTopLevelAndNonResizeable()
{
    struct PropMotifWmHints
    {
    	unsigned long	flags;
    	unsigned long	functions;
    	unsigned long	decorations;
    	long 	            inputMode;
    	unsigned long	status;
    };
    #define QT_XA_MOTIF_WM_HINTS				"_MOTIF_WM_HINTS"
    #define QT_MWM_HINTS_FUNCTIONS	    			0x01
    #define QT_MWM_HINTS_DECORATIONS   			0x10
    #define QT_MWM_ALL_FUNCS_WITHOUT_RESIZE		0x3C
    #define QT_MWM_ALL_DECOR_WITHOUT_RESIZE_HANDLE	0x7A
 
    PropMotifWmHints prop = {0};
    prop.flags |= QT_MWM_HINTS_FUNCTIONS | QT_MWM_HINTS_DECORATIONS;
    prop.functions |= QT_MWM_ALL_FUNCS_WITHOUT_RESIZE;
    prop.decorations |= QT_MWM_ALL_DECOR_WITHOUT_RESIZE_HANDLE;
 
    Atom atom = XInternAtom(x11Display(), QT_XA_MOTIF_WM_HINTS, false);
    XChangeProperty(QX11Info::display(), 
	    winId(), 
	    atom, atom, 
	    32,
	    PropModeReplace, 
	    (u_char*) &prop, 
	    sizeof(PropMotifWmHints) / sizeof(long));   
}

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>

#include <QX11Info>

void MyWidget::callIfWidgetIsTopLevelAndNonResizeable()
{
    struct PropMotifWmHints
    {
    	unsigned long	flags;
    	unsigned long	functions;
    	unsigned long	decorations;
    	long 	            inputMode;
    	unsigned long	status;
    };
    #define QT_XA_MOTIF_WM_HINTS				"_MOTIF_WM_HINTS"
    #define QT_MWM_HINTS_FUNCTIONS	    			0x01
    #define QT_MWM_HINTS_DECORATIONS   			0x10
    #define QT_MWM_ALL_FUNCS_WITHOUT_RESIZE		0x3C
    #define QT_MWM_ALL_DECOR_WITHOUT_RESIZE_HANDLE	0x7A

    PropMotifWmHints prop = {0};
    prop.flags |= QT_MWM_HINTS_FUNCTIONS | QT_MWM_HINTS_DECORATIONS;
    prop.functions |= QT_MWM_ALL_FUNCS_WITHOUT_RESIZE;
    prop.decorations |= QT_MWM_ALL_DECOR_WITHOUT_RESIZE_HANDLE;
       
    Atom atom = XInternAtom(x11Display(), QT_XA_MOTIF_WM_HINTS, false);
    XChangeProperty(QX11Info::display(), 
	    winId(), 
	    atom, atom, 
	    32,
	    PropModeReplace, 
	    (u_char*) &prop, 
	    sizeof(PropMotifWmHints) / sizeof(long));   
}

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