Always redraw entire spiral

src/dvdisaster.h

@@ -1533,7 +1533,7 @@ typedef struct _Spiral
    int diameter;
    int segmentClipping;
    int cursorPos;
-   GdkColor *colorUnderCursor;
+   gint lastRenderedCursorPos; /* use with atomic operations */
 } Spiral;
 
 #ifdef WITH_GUI_YES

src/read-adaptive-window.c

@@ -217,31 +217,20 @@ void GuiClipReadAdaptiveSpiral(int segments)
 
 /*
  * Change the segment color.
- * Segment numbers are passed with an offset of 100,
- * since another routine is occasionally doing an
- * g_idle_remove_by_data(GINT_TO_POINTER(REDRAW_PROGRESS)),
- * with REDRAW_PROGRESS being 4 which would make segment 4 fail to redraw.
- * One of the many places where the Gtk+ API is not well thought out.
+ * We can't ask for a redraw when not an the main thread, but can set an idle
+ * function to do so.
  */
 
 static gboolean segment_idle_func(gpointer data)
-{  int segment = GPOINTER_TO_INT(data);
-  
-   segment-=100;
-   GuiDrawSpiralSegment(Closure->readAdaptiveSpiral,
-			Closure->readAdaptiveSpiral->segmentColor[segment],
-			0,
-			segment);
-
+{
+   GuiDrawSpiral(Closure->readAdaptiveSpiral);
    return FALSE;
 }
 
 void GuiChangeSegmentColor(GdkColor *color, int segment)
 {  
    Closure->readAdaptiveSpiral->segmentColor[segment] = color;
-   if(Closure->readAdaptiveSpiral->cursorPos == segment)
-        Closure->readAdaptiveSpiral->colorUnderCursor = color;
-   else g_idle_add(segment_idle_func, GINT_TO_POINTER(100+segment));
+   g_idle_add(segment_idle_func, 0);
 }
 
 /*

src/read-linear-window.c

@@ -260,8 +260,6 @@ void GuiMarkExistingSectors(void)
    x = Closure->readLinearCurve->rightX + 20;
    
    Closure->additionalSpiralColor = 3;
-   GuiDrawSpiralLabel(Closure->readLinearSpiral, Closure->readLinearCurve->layout,
-		      _("Already present"), Closure->darkSector, x, -1);
 
    for(i=0; i<1000; i++)
       if(Closure->readLinearSpiral->segmentColor[i] == Closure->greenSector)

src/spiral.c

@@ -53,6 +53,7 @@ Spiral* GuiCreateSpiral(GdkColor *outline, GdkColor *fill,
    spiral->segmentColor = g_malloc(n_segments * sizeof(GdkColor*));
    spiral->segmentOutline = g_malloc(n_segments * sizeof(GdkColor*));
    spiral->cursorPos    = -1;
+   spiral->lastRenderedCursorPos = -1;
 
    for(i=0; i<n_segments; i++)
    { 
@@ -92,6 +93,7 @@ void GuiFreeSpiral(Spiral *spiral)
 
 /*
  * Fill spiral segments with given color
+ * Also resets the cursor (this function serves to reset the spiral)
  */
 
 void GuiFillSpiral(Spiral *spiral, GdkColor *color)
@@ -100,6 +102,8 @@ void GuiFillSpiral(Spiral *spiral, GdkColor *color)
    if(spiral)
      for(i=0; i<spiral->segmentCount; i++)
        spiral->segmentColor[i] = color;
+
+   spiral->cursorPos    = -1;
 }
 
 /*
@@ -143,7 +147,10 @@ void GuiDrawSpiral(Spiral *spiral)
 
       GdkColor *outline = spiral->segmentOutline[i] ? spiral->segmentOutline[i] : Closure->grid;
 
-      gdk_gc_set_rgb_fg_color(Closure->drawGC, spiral->segmentColor[i]);
+      if (i == spiral->cursorPos)
+         gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->blueSector);
+      else
+         gdk_gc_set_rgb_fg_color(Closure->drawGC, spiral->segmentColor[i]);
       gdk_draw_polygon(d, Closure->drawGC, TRUE, points, 4);
       gdk_gc_set_rgb_fg_color(Closure->drawGC, outline);
       gdk_draw_polygon(d, Closure->drawGC, FALSE, points, 4);
@@ -158,42 +165,15 @@ void GuiDrawSpiral(Spiral *spiral)
  */
 
 void GuiDrawSpiralSegment(Spiral *spiral, GdkColor *color, GdkColor *outline, int segment)
-{  GdkDrawable *d = gtk_widget_get_window(spiral->widget);
-   double a;
-   double scale_i,scale_o,ring_expand;
-   GdkPoint points[4];
-
+{
    if(segment<0 || segment>=spiral->segmentClipping)
      return;
 
-   a = spiral->segmentPos[segment];
-
-   ring_expand = ((double)spiral->segmentSize * a) / (2.0*M_PI);
-
-   scale_i = (double)spiral->startRadius + ring_expand;
-   scale_o = scale_i + spiral->segmentSize;
-   points[0].x = spiral->mx + scale_i*cos(a);
-   points[0].y = spiral->my + scale_i*sin(a);
-   points[1].x = spiral->mx + scale_o*cos(a);
-   points[1].y = spiral->my + scale_o*sin(a);
-
-   a += atan((double)spiral->segmentSize / scale_o);
-
-   ring_expand = ((double)spiral->segmentSize * a) / (2.0*M_PI);
-
-   scale_i = (double)spiral->startRadius + ring_expand;
-   scale_o = scale_i + spiral->segmentSize;
-   points[3].x = spiral->mx + scale_i*cos(a);
-   points[3].y = spiral->my + scale_i*sin(a);
-   points[2].x = spiral->mx + scale_o*cos(a);
-   points[2].y = spiral->my + scale_o*sin(a);
-
-   spiral->segmentColor[segment] = color;
-   spiral->segmentOutline[segment] = outline;
-   gdk_gc_set_rgb_fg_color(Closure->drawGC, color);
-   gdk_draw_polygon(d, Closure->drawGC, TRUE, points, 4);
-   gdk_gc_set_rgb_fg_color(Closure->drawGC, outline);
-   gdk_draw_polygon(d, Closure->drawGC, FALSE, points, 4);
+   if (spiral->segmentColor[segment] != color || spiral->segmentOutline[segment] != outline)
+   {  spiral->segmentColor[segment] = color;
+      spiral->segmentOutline[segment] = outline;
+      gtk_widget_queue_draw(spiral->widget);
+   }
 }
 
 /*
@@ -232,58 +212,37 @@ void GuiMoveSpiralCursor(Spiral *spiral, int to_segment)
   if(to_segment > spiral->segmentClipping)
     return;
 
-  /* Erase old cursor */
-
-  if(spiral->cursorPos >= 0)
-    GuiDrawSpiralSegment(spiral, spiral->colorUnderCursor, 0, spiral->cursorPos);
-
-  /* Moving to -1 means cursor off */
-
   spiral->cursorPos = to_segment;
 
-  if(to_segment < 0)
-    return;
-
   if(to_segment > spiral->segmentCount-1)
   {  spiral->cursorPos = -1;
      return;
   }
 
-  /* Draw cursor at new place */
-
-  spiral->colorUnderCursor = spiral->segmentColor[to_segment];
-  GuiDrawSpiralSegment(spiral, Closure->blueSector, 0, to_segment);
+  gtk_widget_queue_draw(spiral->widget);
 }
 
 /*
  * Wrapper for moving the spiral cursor from non-GUI thread
  */
 
-typedef struct _cursor_info
-{  Spiral *spiral;
-   int segment;
-} cursor_info;
-
 static gboolean cursor_idle_func(gpointer data)
-{  cursor_info *ci = (cursor_info*)data;
+{  Spiral *spiral = (Spiral*)data;
 
-   GuiMoveSpiralCursor(ci->spiral, ci->segment);
-   g_free(ci);
+   gint cursorPos = g_atomic_int_get(&spiral->cursorPos);
+   if (spiral->lastRenderedCursorPos != cursorPos) {
+      spiral->lastRenderedCursorPos = cursorPos;
+      gtk_widget_queue_draw(spiral->widget);
+   }
 
    return FALSE;
 }
-
 void GuiChangeSpiralCursor(Spiral *spiral, int segment)
 {
    if(!Closure->guiMode)
      return;
-  
-   if(segment != spiral->cursorPos)
-   {  cursor_info *ci = g_malloc(sizeof(cursor_info));
 
-      ci->spiral  = spiral;
-      ci->segment = segment;
-      g_idle_add(cursor_idle_func, ci);
-   }
+   g_atomic_int_set(&spiral->cursorPos, segment);
+   g_idle_add(cursor_idle_func, spiral);
 }
 #endif /* WITH_GUI_YES */