From 105a42e0bbd8c0dd563b8cf1efc1c6dc590f236b Mon Sep 17 00:00:00 2001 From: Miguel de Icaza Date: Fri, 11 Dec 1998 15:20:25 +0000 Subject: [PATCH] 1998-12-11 Federico Mena Quintero * gdesktop.c (click_proxy_button_press): Use a nice arrow cursor for rubberbanding. (click_proxy_filter): Keep a firm jaw when the window manager dies and thus the proxy window is destroyed. (setup_desktop_click_proxy_window): Moved the proxy window creation code to this function. (click_proxy_property_notify): Handle PropertyNotify events from the root window for when the proxy window changes. Now the window manager can restart itself as it pleases and GMC will handle it correctly. --- gnome/ChangeLog | 13 ++++++ gnome/gdesktop.c | 115 +++++++++++++++++++++++++++++++++++++++-------- 2 files changed, 110 insertions(+), 18 deletions(-) diff --git a/gnome/ChangeLog b/gnome/ChangeLog index e0a96a40c..4cba546ed 100644 --- a/gnome/ChangeLog +++ b/gnome/ChangeLog @@ -1,3 +1,16 @@ +1998-12-11 Federico Mena Quintero + + * gdesktop.c (click_proxy_button_press): Use a nice arrow cursor + for rubberbanding. + (click_proxy_filter): Keep a firm jaw when the window manager dies + and thus the proxy window is destroyed. + (setup_desktop_click_proxy_window): Moved the proxy window + creation code to this function. + (click_proxy_property_notify): Handle PropertyNotify events from + the root window for when the proxy window changes. Now the window + manager can restart itself as it pleases and GMC will handle it + correctly. + 1998-12-11 Federico Mena Quintero Wheeeee! Desktop icons can be selected by rubberbanding. You diff --git a/gnome/gdesktop.c b/gnome/gdesktop.c index bea5d337b..69cb65a6c 100644 --- a/gnome/gdesktop.c +++ b/gnome/gdesktop.c @@ -693,7 +693,6 @@ static gint window_button_press (GtkWidget *widget, GdkEventButton *event, gpointer data) { struct desktop_icon_info *dii; - int retval; dii = data; @@ -1623,6 +1622,8 @@ update_drag_selection (int x, int y) static gint click_proxy_button_press (GtkWidget *widget, GdkEventButton *event, gpointer data) { + GdkCursor *cursor; + if (event->button == 1) { click_start_x = event->x; click_start_y = event->y; @@ -1630,12 +1631,14 @@ click_proxy_button_press (GtkWidget *widget, GdkEventButton *event, gpointer dat XGrabServer (GDK_DISPLAY ()); + cursor = gdk_cursor_new (GDK_TOP_LEFT_ARROW); gdk_pointer_grab (GDK_ROOT_PARENT (), FALSE, GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK, NULL, - NULL, + cursor, event->time); + gdk_cursor_destroy (cursor); /* If no modifiers are pressed, we unselect all the icons */ @@ -1705,6 +1708,10 @@ click_proxy_filter (GdkXEvent *xevent, GdkEvent *event, gpointer data) switch (xev->type) { case ButtonPress: case ButtonRelease: + /* Translate button events into events that come from the proxy + * window, so that we can catch them as a signal from the + * invisible widget. + */ if (xev->type == ButtonPress) event->button.type = GDK_BUTTON_PRESS; else @@ -1719,13 +1726,77 @@ click_proxy_filter (GdkXEvent *xevent, GdkEvent *event, gpointer data) event->button.y = xev->xbutton.y; event->button.state = xev->xbutton.state; event->button.button = xev->xbutton.button; - break; + + return GDK_FILTER_TRANSLATE; + + case DestroyNotify: + /* The proxy window was destroyed (i.e. the window manager + * died), so we have to cope with it + */ + printf ("Proxy window destroyed!\n"); + g_assert (((GdkEventAny *) event)->window == click_proxy_gdk_window); + gdk_window_destroy_notify (click_proxy_gdk_window); + click_proxy_gdk_window = NULL; + + return GDK_FILTER_REMOVE; default: - return GDK_FILTER_CONTINUE; + break; } - return GDK_FILTER_TRANSLATE; + return GDK_FILTER_CONTINUE; +} + +/* Creates a proxy window to receive clicks from the root window and sets up the + * necessary event filters. + */ +static void +setup_desktop_click_proxy_window (void) +{ + click_proxy_gdk_window = find_click_proxy_window (); + if (!click_proxy_gdk_window) { + g_warning ("Root window clicks will not work as no GNOME-compliant window manager could be found!"); + return; + } + + /* Make the proxy window send events to the invisible proxy widget */ + gdk_window_set_user_data (click_proxy_gdk_window, click_proxy_invisible); + + /* Add our filter to get events */ + gdk_window_add_filter (click_proxy_gdk_window, click_proxy_filter, NULL); + + /* The proxy window for clicks sends us button press events with + * SubstructureNotifyMask. We need StructureNotifyMask to receive + * DestroyNotify events, too. + */ + + XSelectInput (GDK_DISPLAY (), GDK_WINDOW_XWINDOW (click_proxy_gdk_window), + SubstructureNotifyMask | StructureNotifyMask); +} + +/* Handler for PropertyNotify events from the root window; it must change the + * proxy window to a new one. + */ +static gint +click_proxy_property_notify (GtkWidget *widget, GdkEventProperty *event, gpointer data) +{ + if (event->window != GDK_ROOT_PARENT ()) + return FALSE; + + if (event->atom != gdk_atom_intern ("_WIN_DESKTOP_BUTTON_PROXY", FALSE)) + return FALSE; + + /* If there already is a proxy window, destroy it */ + + click_proxy_gdk_window = NULL; + + /* Get the new proxy window */ + + setup_desktop_click_proxy_window (); + + printf ("Property changed on the root window and I have a new proxy\n"); + + return TRUE; } #define gray50_width 2 @@ -1741,27 +1812,26 @@ setup_desktop_clicks (void) GdkColor color; GdkBitmap *stipple; - click_proxy_gdk_window = find_click_proxy_window (); - if (!click_proxy_gdk_window) { - g_warning ("Root window clicks will not work as no GNOME-compliant window manager could be found!"); - return; - } - click_proxy_invisible = gtk_invisible_new (); gtk_widget_show (click_proxy_invisible); - /* Make the proxy and the root windows send events to the invisible proxy widget */ - - gdk_window_set_user_data (click_proxy_gdk_window, click_proxy_invisible); + /* Make the root window send events to the invisible proxy widget */ gdk_window_set_user_data (GDK_ROOT_PARENT (), click_proxy_invisible); - /* Add our filter to translate virtual root window events into Gdk events */ - + /* Add our filter to get button press/release events (they are sent by + * the WM * with the window set to the root). Our filter will translate + * them to a GdkEvent with the proxy window as its window field. + */ gdk_window_add_filter (GDK_ROOT_PARENT (), click_proxy_filter, NULL); - /* The proxy window for clicks sends us events as SubstructureNotify things */ + /* Select for PropertyNotify events from the root window */ - XSelectInput (GDK_DISPLAY (), GDK_WINDOW_XWINDOW (click_proxy_gdk_window), SubstructureNotifyMask); + XSelectInput (GDK_DISPLAY (), GDK_ROOT_WINDOW (), PropertyChangeMask); + + /* Create the proxy window for clicks on the root window */ + setup_desktop_click_proxy_window (); + + /* Connect the signals */ gtk_signal_connect (GTK_OBJECT (click_proxy_invisible), "button_press_event", (GtkSignalFunc) click_proxy_button_press, @@ -1773,6 +1843,10 @@ setup_desktop_clicks (void) (GtkSignalFunc) click_proxy_motion, NULL); + gtk_signal_connect (GTK_OBJECT (click_proxy_invisible), "property_notify_event", + (GtkSignalFunc) click_proxy_property_notify, + NULL); + /* Create the GC to paint the rubberband rectangle */ click_gc = gdk_gc_new (GDK_ROOT_PARENT ()); @@ -1835,4 +1909,9 @@ desktop_destroy (void) gtk_widget_destroy (dnd_proxy_window); XDeleteProperty (GDK_DISPLAY (), GDK_ROOT_WINDOW (), gdk_atom_intern ("XdndProxy", FALSE)); + + /* Remove click-on-desktop crap */ + + gdk_window_unref (click_proxy_gdk_window); + gtk_widget_destroy (click_proxy_invisible); }