Hopefully solved the problem of waiting for windows to draw themselves once and for...

git-svn-id: http://lassie.dyndns-server.com/svn/gargoyle-gtk@88 ddfedd41-794f-dd11-ae45-00112f111e67

diff --git a/libchimara/chimara-glk-private.h b/libchimara/chimara-glk-private.h
index 2cd928b30bda44b28b0e2f4d31449881e8ed03dd..2cfc523bb08691c73749f1d9e9b1819ef5c0b2d4 100644 (file)
--- a/libchimara/chimara-glk-private.h
+++ b/libchimara/chimara-glk-private.h
@@ -39,6 +39,8 @@ struct _ChimaraGlkPrivate {
     gboolean abort_signalled;
        /* Window arrangement locks */
        GMutex *arrange_lock;
+       GCond *rearranged;
+       gboolean needs_rearrange;
        gboolean ignore_next_arrange_event;
     /* User-defined interrupt handler */
     void (*interrupt_handler)(void);

diff --git a/libchimara/chimara-glk.c b/libchimara/chimara-glk.c
index 1ddeb7911e8a859294f51de746597dbf81f726f1..fc4c446ed05aa51ecead7b2f862061a7588b5b2c 100644 (file)
--- a/libchimara/chimara-glk.c
+++ b/libchimara/chimara-glk.c
@@ -84,6 +84,8 @@ chimara_glk_init(ChimaraGlk *self)
     priv->abort_lock = NULL;
     priv->abort_signalled = FALSE;
        priv->arrange_lock = NULL;
+       priv->rearranged = NULL;
+       priv->needs_rearrange = FALSE;
        priv->ignore_next_arrange_event = FALSE;
     priv->interrupt_handler = NULL;
     priv->root_window = NULL;
@@ -172,7 +174,7 @@ chimara_glk_finalize(GObject *object)
 
        /* Free the window arrangement signalling */
        g_mutex_lock(priv->arrange_lock);
-       /* Make sure no other thread is busy with this */
+       g_cond_free(priv->rearranged);
        g_mutex_unlock(priv->arrange_lock);
        g_mutex_free(priv->arrange_lock);
        priv->arrange_lock = NULL;
@@ -470,6 +472,8 @@ chimara_glk_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
                }
                else
                        priv->ignore_next_arrange_event = FALSE;
+               priv->needs_rearrange = FALSE;
+               g_cond_signal(priv->rearranged);
                g_mutex_unlock(priv->arrange_lock);
        }
 }
@@ -662,6 +666,7 @@ chimara_glk_new(void)
     priv->event_queue_not_full = g_cond_new();
     priv->abort_lock = g_mutex_new();
        priv->arrange_lock = g_mutex_new();
+       priv->rearranged = g_cond_new();
     
     return GTK_WIDGET(self);
 }

diff --git a/libchimara/window.c b/libchimara/window.c
index bb5fde32cf5d6e168dc06a7b247b046ff46008b1..5fd2447421d0d60d7af4d19842ad083b9486e659 100644 (file)
--- a/libchimara/window.c
+++ b/libchimara/window.c
@@ -563,34 +563,24 @@ glk_window_open(winid_t split, glui32 method, glui32 size, glui32 wintype,
 
        /* Set the window as a child of the Glk widget, don't trigger an arrange event */
        g_mutex_lock(glk_data->arrange_lock);
+       glk_data->needs_rearrange = TRUE;
        glk_data->ignore_next_arrange_event = TRUE;
        g_mutex_unlock(glk_data->arrange_lock);
        gtk_widget_set_parent(win->frame, GTK_WIDGET(glk_data->self));
        gtk_widget_queue_resize(GTK_WIDGET(glk_data->self));
        
-       gdk_threads_leave();
-       
-       /* For blank or pair windows, this is almost a no-op. For text grid and
-        text buffer windows, this will wait for GTK to draw the window. Otherwise,
-        opening a window and getting its size immediately will give you the wrong
-        size. */
-       glk_window_get_size(win, NULL, NULL);
-       
     /* For text grid windows, fill the buffer with blanks. */
     if(wintype == wintype_TextGrid)
     {
         /* Create the cursor position mark */
-               gdk_threads_enter();
         GtkTextIter begin;
         GtkTextBuffer *buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(win->widget) );
         gtk_text_buffer_get_start_iter(buffer, &begin);
         gtk_text_buffer_create_mark(buffer, "cursor_position", &begin, TRUE);
-        gdk_threads_leave();
-               
-        /* Fill the buffer with blanks and move the cursor to the upper left */
-        glk_window_clear(win);
-    }
+       }
 
+       gdk_threads_leave();
+    glk_window_clear(win);
        return win;
 }
 
@@ -768,6 +758,7 @@ glk_window_close(winid_t win, stream_result_t *result)
 
        /* Schedule a redraw */
        g_mutex_lock(glk_data->arrange_lock);
+       glk_data->needs_rearrange = TRUE;
        glk_data->ignore_next_arrange_event = TRUE;
        g_mutex_unlock(glk_data->arrange_lock);
        gtk_widget_queue_resize( GTK_WIDGET(glk_data->self) );
@@ -827,6 +818,12 @@ glk_window_clear(winid_t win)
                case wintype_TextGrid:
                    /* fill the buffer with blanks */
                {
+                       /* Wait for the window's size to be updated */
+                       g_mutex_lock(glk_data->arrange_lock);
+                       if(glk_data->needs_rearrange)
+                               g_cond_wait(glk_data->rearranged, glk_data->arrange_lock);
+                       g_mutex_unlock(glk_data->arrange_lock);
+                       
                    gdk_threads_enter();
                    
             /* Manually put newlines at the end of each row of characters in the buffer; manual newlines make resizing the window's grid easier. */
@@ -986,18 +983,14 @@ glk_window_get_size(winid_t win, glui32 *widthptr, glui32 *heightptr)
             break;
             
         case wintype_TextGrid:
+                       /* Wait until the window's size is current */
+                       g_mutex_lock(glk_data->arrange_lock);
+                       if(glk_data->needs_rearrange)
+                               g_cond_wait(glk_data->rearranged, glk_data->arrange_lock);
+                       g_mutex_unlock(glk_data->arrange_lock);
+                       
                        gdk_threads_enter();
-                       /* Wait for the window to be drawn, and then cache the width and height */
-                       gdk_window_process_all_updates();
-                       while(win->widget->allocation.width == 1 && win->widget->allocation.height == 1)
-                   {
-                       /* Release the GDK lock momentarily */
-                       gdk_threads_leave();
-                       gdk_threads_enter();
-                       while(gtk_events_pending())
-                           gtk_main_iteration();
-                   }
-                   
+                       /* Cache the width and height */
                        win->width = (glui32)(win->widget->allocation.width / win->unit_width);
                    win->height = (glui32)(win->widget->allocation.height / win->unit_height);
             gdk_threads_leave();
@@ -1009,26 +1002,13 @@ glk_window_get_size(winid_t win, glui32 *widthptr, glui32 *heightptr)
             break;
             
         case wintype_TextBuffer:
-            /* TODO: Glk wants to be able to get its windows' sizes as soon as they are created, but GTK doesn't decide on their sizes until they are drawn. The drawing happens somewhere in an idle function. A good method would be to make an educated guess of the window's size using the ChimaraGlk widget's size. */
+            /* Wait until the window's size is current */
+                       g_mutex_lock(glk_data->arrange_lock);
+                       if(glk_data->needs_rearrange)
+                               g_cond_wait(glk_data->rearranged, glk_data->arrange_lock);
+                       g_mutex_unlock(glk_data->arrange_lock);
+                       
             gdk_threads_enter();
-            /*if(win->widget->allocation.width == 1 && win->widget->allocation.height == 1)
-            {
-                g_warning("glk_window_get_size: The Glk program requested the size of a window before it was allocated screen space by GTK. The window size is just an educated guess.");
-                guess the size from the parent window;
-                break;
-            } */
-            
-            /* Instead, we wait for GTK to draw the widget. This is probably very slow and should be fixed. */
-            gdk_window_process_all_updates();
-                       while(win->widget->allocation.width == 1 && win->widget->allocation.height == 1)
-            {
-                /* Release the GDK lock momentarily */
-                gdk_threads_leave();
-                gdk_threads_enter();
-                while(gtk_events_pending())
-                    gtk_main_iteration();
-            }
-                
             if(widthptr != NULL)
                 *widthptr = (glui32)(win->widget->allocation.width / win->unit_width);
             if(heightptr != NULL)
@@ -1128,6 +1108,7 @@ glk_window_set_arrangement(winid_t win, glui32 method, glui32 size, winid_t keyw
        /* Tell GTK to rearrange the windows */
        gdk_threads_enter();
        g_mutex_lock(glk_data->arrange_lock);
+       glk_data->needs_rearrange = TRUE;
        glk_data->ignore_next_arrange_event = TRUE;
        g_mutex_unlock(glk_data->arrange_lock);
        gtk_widget_queue_resize(GTK_WIDGET(glk_data->self));
@@ -1193,6 +1174,12 @@ glk_window_move_cursor(winid_t win, glui32 xpos, glui32 ypos)
        VALID_WINDOW(win, return);
        g_return_if_fail(win->type == wintype_TextGrid);
        
+       /* Wait until the window's size is current */
+       g_mutex_lock(glk_data->arrange_lock);
+       if(glk_data->needs_rearrange)
+               g_cond_wait(glk_data->rearranged, glk_data->arrange_lock);
+       g_mutex_unlock(glk_data->arrange_lock);
+
        /* Don't do anything if the window is shrunk down to nothing */
        if(win->width == 0 || win->height == 0)
                return;