Getting resize and expose events through XWindows, but still nothing through gdk. The g_signal_connect still complains about invalid instance. Based on some other docs ( http://gtk.10911.n7.nabble.com/Capture-GdkWindow-event-td8313.html) it seems like I can't attach the configure-event to the GdkWindow.
So now I'm still left with the fact that the GdkWindow doesn't update it's internal size, even if I use gdk_window_get_geometry to pull the info from the X Server, the GdkWindow doesn't update it's internal cache. So... how to get the GdkWindow to update it's internal size values? Code and output below: // Written by Ch. Tronche (http://tronche.lri.fr:8000/) // Modified by C. Nygard to illustrate gdk_window resize issue // Copyright by the author. This is unmaintained, no-warranty free software. // Please use freely. It is appreciated (but by no means mandatory) to // acknowledge the author's contribution. Thank you. // Started on Thu Jun 26 23:29:03 1997 // gcc -o test test.c `pkg-config --libs --cflags gtk+-2.0 gtk+-x11-2.0` #include <X11/Xlib.h> #include <assert.h> #include <unistd.h> #include <gdk/gdk.h> #include <gdk/gdkx.h> #include <gtk/gtk.h> #define NIL (0) void frame_callback(GtkWindow *window, GdkEvent *event, gpointer data) { printf("frame_callback: %d, %d\n", event->configure.x, event->configure.y); } gboolean window_expose_event (GtkWidget *widget, GdkEventExpose *event) { printf("expose_event: (%d, %d) (%d,%d)\n", event->area.x, event->area.y, event->area.width, event->area.height); return FALSE; } main(int argc, char **argv) { GdkWindow *gdk_win; gdk_init(&argc, &argv); // Open the display Display *dpy = XOpenDisplay(NIL); int blackColor = BlackPixel(dpy, DefaultScreen(dpy)); int whiteColor = WhitePixel(dpy, DefaultScreen(dpy)); Window w = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 0, 0, 200, 100, 0, blackColor, blackColor); gdk_win = gdk_window_foreign_new((guint32)w); printf("gdk_win = %p (should be null since window isn't mapped\n", gdk_win); // We want to get MapNotify events XSelectInput(dpy, w, StructureNotifyMask | ExposureMask); XMapWindow(dpy, w); GC gc = XCreateGC(dpy, w, 0, NIL); // Tell the GC we draw using the white color XSetForeground(dpy, gc, whiteColor); // Wait for the MapNotify event int done = 0; while(!done) { XEvent e; Window root; int x, y, xret, yret; unsigned int widthret,heightret,borderwidthret,depthret; // process gdk event loop while(gdk_events_pending()) { GdkEvent *ev = gdk_event_get(); if(ev) { printf("Processing event [%d]\n", ev->type); switch(ev->type) { case GDK_DELETE: done = 1; break; default: printf("GDK Event: [%d]", ev->type); break; } gdk_event_free(ev); }else{ printf("Pending event null\n"); } } XNextEvent(dpy, &e); printf("Handling event (%d)\n", e.type); switch(e.type) { case Expose: printf(" Expose (%d,%d) (%d,%d)\n", e.xexpose.x, e.xexpose.y, e.xexpose.width, e.xexpose.height); // Draw the line XDrawLine(dpy, w, gc, e.xexpose.x, e.xexpose.y, e.xexpose.width, e.xexpose.height); XFlush(dpy); break; case MapNotify: gdk_win = gdk_window_foreign_new((guint32)w); g_signal_connect(G_OBJECT(gdk_win), "configure-event", G_CALLBACK(frame_callback), NULL); g_signal_connect(G_OBJECT(gdk_win), "expose-event", G_CALLBACK(window_expose_event), NULL); gdk_window_get_size(gdk_win, &x, &y); printf(" MapNotify [%p] dims: (%d, %d)\n", gdk_win, x, y); break; case ConfigureNotify: printf(" ConfigureNotify dims: (%d, %d) \n", e.xconfigure.width, e.xconfigure.height); if(gdk_win) { gdk_window_get_geometry(gdk_win, NULL, NULL, &widthret,&heightret, NULL); gdk_window_get_size(gdk_win, &x, &y); printf(" GdkWindow[%p] geometry:(%d, %d) dims:(%d, %d)\n", gdk_win, widthret, heightret, x, y); } break; default: printf(" Unhandled event: (%d)\n", e.type); } XGetGeometry(dpy, w, &root, &xret, &yret, &widthret, &heightret, &borderwidthret, &depthret); } } gdk_win = (nil) (should be null since window isn't mapped Pending event null Handling event (21) Unhandled event: (21) Handling event (22) ConfigureNotify dims: (200, 100) Handling event (19) (test:35771): GLib-GObject-WARNING **: gsignal.c:2275: signal `configure-event' is invalid for instance `0x193e350' (test:35771): GLib-GObject-WARNING **: gsignal.c:2275: signal `expose-event' is invalid for instance `0x193e350' MapNotify [0x193e350] dims: (200, 100) Handling event (12) Expose (0,0) (200,100) Handling event (22) ConfigureNotify dims: (204, 104) GdkWindow[0x193e350] geometry:(204, 104) dims:(200, 100) Handling event (12) Expose (0,0) (204,104) Handling event (22) ConfigureNotify dims: (212, 111) GdkWindow[0x193e350] geometry:(212, 111) dims:(200, 100) Handling event (12) Expose (0,0) (212,111) Handling event (22) ConfigureNotify dims: (217, 117) GdkWindow[0x193e350] geometry:(217, 117) dims:(200, 100) Handling event (12) Expose (0,0) (217,117) Handling event (22) ConfigureNotify dims: (224, 124) GdkWindow[0x193e350] geometry:(224, 124) dims:(200, 100) Handling event (12) Expose (0,0) (224,124) Handling event (22) ConfigureNotify dims: (227, 128) GdkWindow[0x193e350] geometry:(227, 128) dims:(200, 100) Handling event (12) Expose (0,0) (227,128) Handling event (22) ConfigureNotify dims: (228, 130) GdkWindow[0x193e350] geometry:(228, 130) dims:(200, 100) Handling event (12) Expose (0,0) (228,130) On Mon, Mar 24, 2014 at 5:51 AM, David Marceau <uticdmarceau2...@yahoo.ca>wrote: > On 03/23/2014 11:07 PM, Carl Nygard wrote: > > Thanks for the links. However, most of the information is geared toward > > GtkWindow instead of GdkWindow. I tried adding the configure-event signal > > connection but I get a message from Gtk saying: > > (test:25776): GLib-GObject-WARNING **: gsignal.c:2275: signal > > `configure-event' is invalid for instance `0xe45350' > > > two possibilities: > -bad window handle > -configure-event not flagged on at window create > > Suggestions: > -you create the window with x, so set the configure-event flag, right > after the win create at the x level for starters. > -validate the x window handle before hand, right after its creation. > -Get the x callback to at least log some resize/expose events. Don't do > anything here apart from that for the time being. > > -validate the gdk window handle before hand, right after its creation. > -then again set the callback with the configure event at the gdk window > level and log the resize event and expose events. > > -you will need to delete the pixmap and recreate a new one with a > different size within the window resize and set it within the window > with the respective position and size. From what I understand you still > don't correctly capture the window resize event yet so deal with that > first with log messages. Once that's settled you can fix this. > > Cheers, > David Marceau > > > All I really care about is getting GdkWindow to have current size > > information when the XWindow resizes. > > > > To answer your question about the code, it does work on FC4, but we're > > porting the existing code to RH5 and some of the drawing started > breaking. > > Specifically, we are drawing to a backing pixmap to create animation > > frames, but when the frames are copied to the windows, the area that is > > rendered is limited to whatever the window size was at the time we create > > the GdkWindow via gdk_window_foreign_new(). This is because the > GdkWindow > > does not have accurate information regarding it's true size. > > > > --carl > > > > > > > > > > On Sun, Mar 23, 2014 at 4:09 PM, David Marceau < > uticdmarceau2...@yahoo.ca>wrote: > > > >> There is a difference between resize and expose events. You're going to > >> have to take care of this difference within your code and possibly force > >> the expose event to trigger a resize event which is not necessarily done > >> by default. > >> > >> The urls below show how to set the configure event in X, Motif and > >> GTK/GDK to the appropriate window resize callback. The gtk tutorial > >> mentioned a drawing area pixmap to be removed and recreated with the > >> correct size. > >> > >> http://www.lemoda.net/c/xlib-resize/ > >> http://zetcode.com/tutorials/gtktutorial/gtkevents/ > >> http://www.gtk.org/tutorial1.2/gtk_tut-23.html > >> http://www-f9.ijs.si/~matevz/docs/007-2392-003/sgi_html/ch03.html > >> > >> With all the above being said, have you succeeded in running your app on > >> the newer os without changing the lines of code? I tend to believe you > >> don't need to change your c code if you simply recompile and run on the > >> newer os. Motif Libs exist on the newer os, just to get it running. > >> > >> Cheers, > >> David Marceau > >> > >> > >> > >> > >> > >> _______________________________________________ > >> gtk-app-devel-list mailing list > >> gtk-app-devel-list@gnome.org > >> https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list > >> > > > > _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
