From e59ade72d43f975a967823362ce085d6b72dda7e Mon Sep 17 00:00:00 2001
From: johncoswell <johncoswell@users.sourceforge.net>
Date: Sun, 13 Aug 2006 17:45:18 +0000
Subject: [PATCH] added functions to allow update events to process during
 long-running operations

---
 src/desktop.cpp                     | 6 ++++++
 src/desktop.h                       | 1 +
 src/ui/view/edit-widget-interface.h | 3 +++
 src/ui/view/edit-widget.cpp         | 9 +++++++++
 src/ui/view/edit-widget.h           | 1 +
 src/widgets/desktop-widget.cpp      | 9 +++++++++
 src/widgets/desktop-widget.h        | 3 +++
 7 files changed, 32 insertions(+)

diff --git a/src/desktop.cpp b/src/desktop.cpp
index 189ab9866..04328e84d 100644
--- a/src/desktop.cpp
+++ b/src/desktop.cpp
@@ -1054,6 +1054,12 @@ SPDesktop::onRedrawRequested ()
     }
 }
 
+void
+SPDesktop::updateCanvasNow()
+{
+  _widget->requestCanvasUpdateAndWait();
+}
+
 /**
  * Associate document with desktop.
  */
diff --git a/src/desktop.h b/src/desktop.h
index e499358c7..5e0b1f3a8 100644
--- a/src/desktop.h
+++ b/src/desktop.h
@@ -224,6 +224,7 @@ struct SPDesktop : public Inkscape::UI::View::View
     void setToolboxAdjustmentValue (gchar const* id, double val);
     bool isToolboxButtonActive (gchar const *id);
     void updateNow();
+    void updateCanvasNow();
     
     void fullscreen();
 
diff --git a/src/ui/view/edit-widget-interface.h b/src/ui/view/edit-widget-interface.h
index 689eff4a7..605c72b59 100644
--- a/src/ui/view/edit-widget-interface.h
+++ b/src/ui/view/edit-widget-interface.h
@@ -70,6 +70,9 @@ struct EditWidgetInterface
     /// Queue a redraw request with the canvas
     virtual void requestCanvasUpdate() = 0;
     
+    /// Force a redraw of the canvas
+    virtual void requestCanvasUpdateAndWait() = 0;
+    
     /// Update the "active desktop" indicator
     virtual void activateDesktop() = 0;
     
diff --git a/src/ui/view/edit-widget.cpp b/src/ui/view/edit-widget.cpp
index 626c30941..6a4306147 100644
--- a/src/ui/view/edit-widget.cpp
+++ b/src/ui/view/edit-widget.cpp
@@ -1293,6 +1293,15 @@ EditWidget::requestCanvasUpdate()
     _svg_canvas.widget().queue_draw();
 }
 
+void
+EditWidget::requestCanvasUpdateAndWait()
+{
+    requestCanvasUpdate();
+
+    while (gtk_events_pending()) 
+      gtk_main_iteration_do(FALSE);
+}
+
 void
 EditWidget::activateDesktop()
 {
diff --git a/src/ui/view/edit-widget.h b/src/ui/view/edit-widget.h
index 0beb77b53..096137c2a 100644
--- a/src/ui/view/edit-widget.h
+++ b/src/ui/view/edit-widget.h
@@ -108,6 +108,7 @@ public:
     virtual bool shutdown();
     virtual void destroy();
     virtual void requestCanvasUpdate();
+    virtual void requestCanvasUpdateAndWait();
     virtual void activateDesktop();
     virtual void deactivateDesktop();
     virtual void viewSetPosition (NR::Point p);
diff --git a/src/widgets/desktop-widget.cpp b/src/widgets/desktop-widget.cpp
index 9590af94c..795fdb0f8 100644
--- a/src/widgets/desktop-widget.cpp
+++ b/src/widgets/desktop-widget.cpp
@@ -660,6 +660,15 @@ SPDesktopWidget::requestCanvasUpdate() {
     gtk_widget_queue_draw (GTK_WIDGET (SP_CANVAS_ITEM (this->desktop->main)->canvas));
 }
 
+void 
+SPDesktopWidget::requestCanvasUpdateAndWait() {
+    requestCanvasUpdate();
+    
+    while (gtk_events_pending()) 
+      gtk_main_iteration_do(FALSE);
+
+}
+
 void 
 SPDesktopWidget::setCoordinateStatus(NR::Point p)
 {
diff --git a/src/widgets/desktop-widget.h b/src/widgets/desktop-widget.h
index cc66bf180..409f38a8d 100644
--- a/src/widgets/desktop-widget.h
+++ b/src/widgets/desktop-widget.h
@@ -133,6 +133,8 @@ struct SPDesktopWidget {
         
         virtual void requestCanvasUpdate()
             { _dtw->requestCanvasUpdate(); }
+        virtual void requestCanvasUpdateAndWait()
+            { _dtw->requestCanvasUpdateAndWait(); }
         virtual void activateDesktop()
             { sp_dtw_desktop_activate (_dtw); }
         virtual void deactivateDesktop()
@@ -183,6 +185,7 @@ struct SPDesktopWidget {
     bool isToolboxButtonActive (gchar const *id);
     void setCoordinateStatus(NR::Point p);
     void requestCanvasUpdate();
+    void requestCanvasUpdateAndWait();
     void updateTitle(gchar const *uri);
 };
 
-- 
2.30.2