[anjal] Draw high lighted arrow for selected msgs in conv view.

[Srinivasa Ragavan <sragavan src gnome org>]

commit 0f1cebe9b9a0a9f3573a65883ddf70a88f470914
Author: Srinivasa Ragavan <sragavan novell com>
Date:   Wed Mar 25 18:18:04 2009 +0530

    Draw high lighted arrow for selected msgs in conv view.
---
 src/mail-message-view.c |  121 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 119 insertions(+), 2 deletions(-)

diff --git a/src/mail-message-view.c b/src/mail-message-view.c
index 38303ce..caf1e90 100644
--- a/src/mail-message-view.c
+++ b/src/mail-message-view.c
@@ -154,7 +154,7 @@ mmv_focus_in (GtkWidget *w, GdkEventFocus *event, MailMessageView *mmv)
 	 gtk_widget_modify_fg (mmv->more_details, GTK_STATE_NORMAL, pcolor_fg_sel);
 	 gtk_widget_modify_fg (mmv->sub_details, GTK_STATE_NORMAL, pcolor_fg_sel);
 	 gtk_widget_modify_fg (mmv->date_details, GTK_STATE_NORMAL, pcolor_fg_sel);
-	mmv->priv->active_color = scolor_sel;;
+	mmv->priv->active_color = scolor_sel;
 	mmv_invalidate_row (mmv->priv->header_row);
 
 	return FALSE;
@@ -403,6 +403,123 @@ draw_rounded_rectangle (cairo_t *cr, gdouble x, gdouble y, gdouble width, gdoubl
 
 }
 
+/* HACK: None of the themes pick the color for Arrow. So I draw it. Its reqd. 
+ * to show the selected messages arrow on a different color. It isn't visible 
+ * otherwise. This bit of code is reffered from gtk+/gtk/gtkstyle.c */
+static int
+mmv_arrow_expose (GtkWidget *widget, GdkEventExpose *event, MailMessageView *mmv)
+{
+	 GtkArrow *arrow = (GtkArrow *)widget;
+	 if (GTK_WIDGET_DRAWABLE (widget))  {
+		  GtkArrow *arrow = GTK_ARROW (widget);
+		  GtkMisc *misc = GTK_MISC (widget);
+		  GtkShadowType shadow_type;
+		  gint width, height;
+		  gint x, y;
+		  gint extent;
+		  gfloat xalign;
+		  GtkArrowType effective_arrow_type;
+		  gfloat arrow_scaling;
+		  gboolean active = mmv->priv->active_color == scolor_sel ? TRUE : FALSE;
+
+		  gtk_widget_style_get (widget, "arrow-scaling", &arrow_scaling, NULL);
+
+		  width = widget->allocation.width - misc->xpad * 2;
+		  height = widget->allocation.height - misc->ypad * 2;
+		  extent = MIN (width, height) * arrow_scaling;
+		  effective_arrow_type = arrow->arrow_type;
+
+		  if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
+			   xalign = misc->xalign;
+		  else  {
+			   xalign = 1.0 - misc->xalign;
+			   if (arrow->arrow_type == GTK_ARROW_LEFT)
+					effective_arrow_type = GTK_ARROW_RIGHT;
+			   else if (arrow->arrow_type == GTK_ARROW_RIGHT)
+					effective_arrow_type = GTK_ARROW_LEFT;
+		  }
+
+		  x = floor (widget->allocation.x + misc->xpad
+					 + ((widget->allocation.width - extent) * xalign));
+		  y = floor (widget->allocation.y + misc->ypad
+					 + ((widget->allocation.height - extent) * misc->yalign));
+
+		  shadow_type = arrow->shadow_type;
+
+		  if (widget->state == GTK_STATE_ACTIVE) {
+			   if (shadow_type == GTK_SHADOW_IN)
+					shadow_type = GTK_SHADOW_OUT;
+			   else if (shadow_type == GTK_SHADOW_OUT)
+					shadow_type = GTK_SHADOW_IN;
+			   else if (shadow_type == GTK_SHADOW_ETCHED_IN)
+					shadow_type = GTK_SHADOW_ETCHED_OUT;
+			   else if (shadow_type == GTK_SHADOW_ETCHED_OUT)
+					shadow_type = GTK_SHADOW_ETCHED_IN;
+		  }
+
+
+		  widget->style->fg[widget->state] = active ? *pcolor_fg_sel : *pcolor_fg_norm; 
+		  /* gtk_paint_arrow (widget->style, widget->window,
+						   widget->state, shadow_type, 
+						   &event->area, widget, "mrrow1", 
+						   effective_arrow_type, TRUE, 
+						   x, y, extent, extent); */
+      
+     
+		  if (1)  {
+			   GdkWindow *window = widget->window;    
+			   GdkRectangle *area = &event->area;
+			   GtkStateType   state = widget->state;
+			   GtkStyle      *style = widget->style;
+			   GtkShadowType  shadow = shadow_type;
+			   const gchar   *detail = "arrow";
+			   GtkArrowType   arrow_type = effective_arrow_type;
+			   gboolean fill = TRUE;
+			   width = height = extent;
+			   cairo_t *cr = gdk_cairo_create (window);
+			   gdk_cairo_set_source_color (cr, active ? pcolor_fg_sel : pcolor_fg_norm);
+  
+			   if (area)
+			   {
+					gdk_cairo_rectangle (cr, area);
+					cairo_clip (cr);
+			   }
+    
+			   if (arrow_type == GTK_ARROW_DOWN)
+			   {
+					cairo_move_to (cr, x,              y);
+					cairo_line_to (cr, x + width,      y);
+					cairo_line_to (cr, x + width / 2., y + height);
+			   }
+			   else if (arrow_type == GTK_ARROW_UP)
+			   {
+					cairo_move_to (cr, x,              y + height);
+					cairo_line_to (cr, x + width / 2., y);
+					cairo_line_to (cr, x + width,      y + height);
+			   }
+			   else if (arrow_type == GTK_ARROW_LEFT)
+			   {
+					cairo_move_to (cr, x + width,      y);
+					cairo_line_to (cr, x + width,      y + height);
+					cairo_line_to (cr, x,              y + height / 2.);
+			   }
+			   else if (arrow_type == GTK_ARROW_RIGHT)
+			   {
+					cairo_move_to (cr, x,              y);
+					cairo_line_to (cr, x + width,      y + height / 2.);
+					cairo_line_to (cr, x,              y + height);
+			   }
+
+			   cairo_close_path (cr);
+			   cairo_fill (cr);
+
+			   cairo_destroy (cr);	      
+		  }
+	 }
+
+	 return TRUE;
+}
+
 static int
 mmv_sh_color_expose (GtkWidget *w, GdkEventExpose *event, MailMessageView *mmv)
 {
@@ -529,7 +646,7 @@ mail_message_view_set_message (MailMessageView *mmview, CamelFolder *folder, con
 	mmview->priv->arrow = gtk_arrow_new (GTK_ARROW_RIGHT, GTK_SHADOW_NONE);
 	gtk_widget_show (mmview->priv->arrow);
 	gtk_box_pack_start (header_row, mmview->priv->arrow, FALSE, FALSE, 2);
-
+	g_signal_connect (mmview->priv->arrow, "expose-event", G_CALLBACK(mmv_arrow_expose), mmview);
 	tmp = gtk_event_box_new ();
 	EXPOSE(tmp, mmview);
 	mmview->priv->unread_image = gtk_image_new ();