Jazz up glxdemo

Since we're modifying glxdemo anyway, this changes it so that clicking on the window
changes the clear colour to a randomly chosen one and redraws.

1 files changed, 15 insertions, 1 deletions

diff --git a/progs/xdemos/glxdemo.c b/progs/xdemos/glxdemo.c
index 843aabb329..75e11443d2 100644
--- a/progs/xdemos/glxdemo.c
+++ b/progs/xdemos/glxdemo.c
@@ -69,7 +69,7 @@ static Window make_rgb_db_window( Display *dpy,
    attr.background_pixel = 0;
    attr.border_pixel = 0;
    attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
-   attr.event_mask = StructureNotifyMask | ExposureMask;
+   attr.event_mask = StructureNotifyMask | ExposureMask | ButtonPressMask;
    mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 
    win = XCreateWindow( dpy, root, 0, 0, width, height,
@@ -90,6 +90,17 @@ static Window make_rgb_db_window( Display *dpy,
 }
 
 
+static void new_colour(Display *dpy, Window win)
+{
+   GLfloat r, g, b;
+   r = (GLfloat)random() / (GLfloat)RAND_MAX;
+   g = (GLfloat)random() / (GLfloat)RAND_MAX;
+   b = (GLfloat)random() / (GLfloat)RAND_MAX;
+   glClearColor(r, g, b, 1.0);
+   redraw(dpy, win);
+}
+
+
 static void event_loop( Display *dpy )
 {
    XEvent event;
@@ -104,6 +115,9 @@ static void event_loop( Display *dpy )
 	 case ConfigureNotify:
 	    resize( event.xconfigure.width, event.xconfigure.height );
 	    break;
+	 case ButtonPress:
+	    new_colour(dpy, event.xany.window);
+	    break;
       }
    }
 }