Thanks. I added the following lines as told. Now I am getting a window but
1) it is not circular shaped although I am using X shape extension API
2) it is not accepting any input. XNextEvent() still hangs
attached is the modified program. Anything else I need to add
Also, can anyone help me to understand
what difference does it make if we call XSelectInput or XShapeSelectInput?
Do we always need to use XShapeSelectInput if we have set a shape on the
window? Or are there cases in which we would want to use XSelectInput with a
shaped window?
Regards & thanks in advance
On Tue, Feb 1, 2011 at 7:15 AM, Pat Kane <[email protected]> wrote:
> You should add a line like this too:
> XSelectInput(dsp, win, ExposureMask|ButtonPressMask|ButtonReleaseMask );
>
>
> On Mon, Jan 31, 2011 at 9:39 AM, Pat Kane <[email protected]> wrote:
> > Add this line just before the event loop:
> > XMapWindow(dsp, win);
> > Pat
> > ---
> >
> >
> >
> > On Mon, Jan 31, 2011 at 2:05 AM, Prasanta Sadhukhan
> > <[email protected]> wrote:
> >> Thanks for the pointer. I saw that the example use widget API through
> >> XCreateManagedWIdget APIs.
> >> Are this required to use the shape extension API to work?
> >>
> >> I wanted to use the shape API without this if possible. I tried a small
> >> example of creating a circular window which will have 2 diagonal line in
> it
> >> and the window should close when any button is pressed inside it.
> Attached
> >> is the c program I tried but it is not creating any window and is
> hanging
> >> inside XNextEvent() call
> >> Can anyone please point to me as to what is wrong in this program. I am
> a
> >> newbie to X-programming
> >>
> >> Also, one more question regarding events is
> >> what difference does it make if we call XSelectInput or
> XShapeSelectInput?
> >> Do we always need to use XShapeSelectInput if we have set a shape on the
> >> window? Or are there cases in which we would want to use XSelectInput
> with a
> >> shaped window?
> >>
> >> Thanks in advance
> >> Prashant
> >>
> >> On Mon, Jan 24, 2011 at 9:14 PM, Alan Coopersmith
> >> <[email protected]> wrote:
> >>>
> >>> On 01/24/11 03:34 AM, Prasanta Sadhukhan wrote:
> >>> > Thanks for the information. Is there any link which shows an example
> of
> >>> > how to
> >>> > use this APIs for example, if I want to create a rounded-rect window.
> >>>
> >>> See the oclock sources, which use the shape extension to draw a
> circular
> >>> clock
> >>> window:
> >>>
> >>> http://cgit.freedesktop.org/xorg/app/oclock/tree/ or
> >>> http://www.x.org/releases/individual/app/oclock-1.0.2.tar.bz2
> >>>
> >>> --
> >>> -Alan Coopersmith- [email protected]
> >>> Oracle Solaris Platform Engineering: X Window System
> >>>
> >>
> >>
> >> _______________________________________________
> >> [email protected]: X.Org development
> >> Archives: http://lists.x.org/archives/xorg-devel
> >> Info: http://lists.x.org/mailman/listinfo/xorg-devel
> >>
> >
>
#include <Xlib.h> // preceede most other headers!
#include <extensions/shape.h>
#include <Xregion.h>
#include <Xutil.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <malloc.h>
int main(){
int shape_event_base, shape_error_base, maj, min;
Pixmap shape_mask;
GC shape_GC;
XGCValues xgcv;
int win_width = 200, win_height = 200;
int origin_x = 50, origin_y = 50;
Display *dsp = XOpenDisplay( NULL );
if( !dsp ){ return 1; }
if (!XShapeQueryExtension(dsp, &shape_event_base, &shape_error_base))
{
printf("XShape Extension not supported\n");
exit(0);
}
/*
Status st = XShapeQueryVersion(dsp, &maj, &min);
if (st)
printf("XShapeQueryVersion returned major version %d, minor version %d\n", maj, min);
else
printf("XShapeQueryVersion failed, returned %d\n", st);
*/
int screenNumber = DefaultScreen(dsp);
unsigned long white = WhitePixel(dsp,screenNumber);
unsigned long black = BlackPixel(dsp,screenNumber);
Window win = XCreateSimpleWindow(dsp,
DefaultRootWindow(dsp),
origin_x, origin_y, // origin
300, 300, // size
0, black, // border
white ); // backgd
XMapWindow(dsp, win);
/* allocate a pixmap to draw shapes in */
shape_mask = XCreatePixmap(dsp, win, win_width, win_height, 1);
shape_GC = XCreateGC(dsp, shape_mask, 0, &xgcv);
fprintf(stdout, "allocate a pixmap to draw shapes in\n");
fflush(stdout);
/* erase the pixmap */
XSetForeground(dsp, shape_GC, 0);
XFillRectangle(dsp, shape_mask, shape_GC, origin_x,origin_y,win_width, win_height);
XSetForeground(dsp, shape_GC, 1);
fprintf(stdout, "erase the pixmap\n");
fflush(stdout);
/* draw the bounding shape */
XFillArc(dsp, shape_mask, shape_GC, win_width/2, win_height/2, win_width/2, win_height/2, 0, 360*64);
XShapeCombineMask(dsp, win, ShapeBounding, win_width, win_height, shape_mask, ShapeSet);
fprintf(stdout, "draw the bounding shape\n");
fflush(stdout);
/* draw the clip shape */
XFillArc(dsp, shape_mask, shape_GC, win_width/2, win_height/2, win_width/2, win_height/2, 0, 360*64);
XShapeCombineMask(dsp, win, ShapeClip, origin_x,origin_y, shape_mask, ShapeSet);
fprintf(stdout, "draw the clip shape\n");
fflush(stdout);
long eventMask = ShapeNotifyMask;
XShapeSelectInput(dsp, win, eventMask|ExposureMask|ButtonPressMask|ButtonReleaseMask);
fprintf(stdout, "Event type selected. XNextEvent to be called\n");
fflush(stdout);
XEvent evt;
do{
XNextEvent( dsp, &evt ); // calls XFlush
fprintf(stdout, "XNextEvent called\n");
fflush(stdout);
}while( evt.type != MapNotify );
XSetForeground( dsp, shape_GC, black );
/* draw diagonal lines on the shaped window */
XDrawLine(dsp, shape_mask, shape_GC, 10, 10,190,190); //from-to
XDrawLine(dsp, shape_mask, shape_GC, 10,190,190, 10); //from-to
fprintf(stdout, "Draw Line drawn\n");
fflush(stdout);
eventMask = ButtonPressMask|ButtonReleaseMask;
XSelectInput(dsp,win,eventMask); // override prev
printf("ButtonPressMask|ButtonReleaseMask selected\n");
do{
XNextEvent( dsp, &evt ); // calls XFlush()
printf("XFlush\n");
}while( evt.type != ButtonRelease );
XDestroyWindow( dsp, win );
XCloseDisplay( dsp );
printf("Window destroyed\n");
return 0;
}
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