gnome-canvas: Change GnomeCanvasItem->point vfunc

Previously the function returned the distance to the nearest item. Now
it only returns an item that is hit. This slightly changes semantics
(button events are no longer dispatched to the nearest item, but only to
the item actually clicked on), but makes the code way simpler and
actually does what one would expect.

8 files changed, 37 insertions, 59 deletions

diff --git a/widgets/misc/e-calendar-item.c b/widgets/misc/e-calendar-item.c
index f5d2f870af..5ca1143c96 100644
--- a/widgets/misc/e-calendar-item.c
+++ b/widgets/misc/e-calendar-item.c
@@ -90,12 +90,11 @@ static void e_calendar_item_draw_day_numbers (ECalendarItem	*calitem,
 					      gint		 start_weekday,
 					      gint		 cells_x,
 					      gint		 cells_y);
-static gdouble e_calendar_item_point	(GnomeCanvasItem *item,
+static GnomeCanvasItem *e_calendar_item_point	(GnomeCanvasItem *item,
 					 gdouble		  x,
 					 gdouble		  y,
 					 gint		  cx,
-					 gint		  cy,
-					 GnomeCanvasItem **actual_item);
+					 gint		  cy);
 static void e_calendar_item_stop_selecting (ECalendarItem *calitem,
 					    guint32 time);
 static void e_calendar_item_selection_add_days (ECalendarItem *calitem,
@@ -1760,13 +1759,11 @@ e_calendar_item_get_week_number	(ECalendarItem *calitem,
 /* This is supposed to return the nearest item the the point and the distance.
    Since we are the only item we just return ourself and 0 for the distance.
    This is needed so that we get button/motion events. */
-static double
+static GnomeCanvasItem *
 e_calendar_item_point (GnomeCanvasItem *item, gdouble x, gdouble y,
-			   gint cx, gint cy,
-			   GnomeCanvasItem **actual_item)
+		       gint cx, gint cy)
 {
-	*actual_item = item;
-	return 0.0;
+	return item;
 }
 
 static void
diff --git a/widgets/misc/e-canvas-background.c b/widgets/misc/e-canvas-background.c
index f6179379e4..b2be246f21 100644
--- a/widgets/misc/e-canvas-background.c
+++ b/widgets/misc/e-canvas-background.c
@@ -371,23 +371,21 @@ ecb_draw (GnomeCanvasItem *item,
 			    x1, y1, x2 - x1, y2 - y1);
 }
 
-static double
-ecb_point (GnomeCanvasItem *item, gdouble x, gdouble y, gint cx, gint cy,
-	   GnomeCanvasItem **actual_item)
+static GnomeCanvasItem *
+ecb_point (GnomeCanvasItem *item, gdouble x, gdouble y, gint cx, gint cy)
 {
 	ECanvasBackground *ecb = E_CANVAS_BACKGROUND (item);
 
 	if (ecb->priv->x1 >= 0 && ecb->priv->x1 > x)
-		return 1.0;
+		return NULL;
 	if (ecb->priv->x2 >= 0 && ecb->priv->x2 < x)
-		return 1.0;
+		return NULL;
 	if (ecb->priv->y1 >= 0 && ecb->priv->y1 > y)
-		return 1.0;
+		return NULL;
 	if (ecb->priv->y2 >= 0 && ecb->priv->y2 < y)
-		return 1.0;
-	*actual_item = item;
+		return NULL;
 
-	return 0.0;
+	return item;
 }
 
 static void
diff --git a/widgets/misc/e-canvas.c b/widgets/misc/e-canvas.c
index dfa529ec6b..0b24b84cb9 100644
--- a/widgets/misc/e-canvas.c
+++ b/widgets/misc/e-canvas.c
@@ -167,13 +167,12 @@ canvas_emit_event (GnomeCanvas *canvas,
  * invariant. */
 #define HACKISH_AFFINE
 
-static double
+static GnomeCanvasItem *
 gnome_canvas_item_invoke_point (GnomeCanvasItem *item,
                                 gdouble x,
                                 gdouble y,
                                 gint cx,
-                                gint cy,
-                                GnomeCanvasItem **actual_item)
+                                gint cy)
 {
 #ifdef HACKISH_AFFINE
 	gdouble i2w[6], w2c[6], i2c[6], c2i[6];
@@ -193,7 +192,7 @@ gnome_canvas_item_invoke_point (GnomeCanvasItem *item,
 #endif
 
 	return (* GNOME_CANVAS_ITEM_CLASS (G_OBJECT_GET_CLASS (item))->point) (
-		item, x, y, cx, cy, actual_item);
+		item, x, y, cx, cy);
 }
 
 /* Re-picks the current item in the canvas, based on the event's coordinates.
@@ -287,8 +286,7 @@ pick_current_item (GnomeCanvas *canvas, GdkEvent *event)
 		/* find the closest item */
 
 		if (canvas->root->flags & GNOME_CANVAS_ITEM_VISIBLE)
-			gnome_canvas_item_invoke_point (canvas->root, x, y, cx, cy,
-							&canvas->new_current_item);
+			canvas->new_current_item = gnome_canvas_item_invoke_point (canvas->root, x, y, cx, cy);
 		else
 			canvas->new_current_item = NULL;
 	} else
diff --git a/widgets/table/e-table-field-chooser-item.c b/widgets/table/e-table-field-chooser-item.c
index 67beee9d52..20048007d7 100644
--- a/widgets/table/e-table-field-chooser-item.c
+++ b/widgets/table/e-table-field-chooser-item.c
@@ -522,12 +522,10 @@ etfci_draw (GnomeCanvasItem *item,
 	}
 }
 
-static double
-etfci_point (GnomeCanvasItem *item, gdouble x, gdouble y, gint cx, gint cy,
-	    GnomeCanvasItem **actual_item)
+static GnomeCanvasItem *
+etfci_point (GnomeCanvasItem *item, gdouble x, gdouble y, gint cx, gint cy)
 {
-	*actual_item = item;
-	return 0.0;
+	return item;
 }
 
 static gboolean
diff --git a/widgets/table/e-table-header-item.c b/widgets/table/e-table-header-item.c
index f3ed548463..0f7444285a 100644
--- a/widgets/table/e-table-header-item.c
+++ b/widgets/table/e-table-header-item.c
@@ -1070,12 +1070,10 @@ ethi_draw (GnomeCanvasItem *item,
 	g_hash_table_destroy (arrows);
 }
 
-static double
-ethi_point (GnomeCanvasItem *item, gdouble x, gdouble y, gint cx, gint cy,
-	    GnomeCanvasItem **actual_item)
+static GnomeCanvasItem *
+ethi_point (GnomeCanvasItem *item, gdouble x, gdouble y, gint cx, gint cy)
 {
-	*actual_item = item;
-	return 0.0;
+	return item;
 }
 
 /*
diff --git a/widgets/table/e-table-item.c b/widgets/table/e-table-item.c
index 7bd0ed4427..d68c69a220 100644
--- a/widgets/table/e-table-item.c
+++ b/widgets/table/e-table-item.c
@@ -2042,13 +2042,10 @@ exit:
 	cairo_destroy (cr);
 }
 
-static double
-eti_point (GnomeCanvasItem *item, gdouble x, gdouble y, gint cx, gint cy,
-	   GnomeCanvasItem **actual_item)
+static GnomeCanvasItem *
+eti_point (GnomeCanvasItem *item, gdouble x, gdouble y, gint cx, gint cy)
 {
-	*actual_item = item;
-
-	return 0.0;
+	return item;
 }
 
 static gboolean
diff --git a/widgets/text/e-reflow.c b/widgets/text/e-reflow.c
index 3e062f0f93..4974fd8f04 100644
--- a/widgets/text/e-reflow.c
+++ b/widgets/text/e-reflow.c
@@ -43,7 +43,7 @@ static void e_reflow_unrealize (GnomeCanvasItem *item);
 static void e_reflow_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
 				    gint x, gint y, gint width, gint height);
 static void e_reflow_update (GnomeCanvasItem *item, gdouble affine[6], ArtSVP *clip_path, gint flags);
-static gdouble e_reflow_point (GnomeCanvasItem *item, gdouble x, gdouble y, gint cx, gint cy, GnomeCanvasItem **actual_item);
+static GnomeCanvasItem *e_reflow_point (GnomeCanvasItem *item, gdouble x, gdouble y, gint cx, gint cy);
 static void e_reflow_reflow (GnomeCanvasItem *item, gint flags);
 static void set_empty (EReflow *reflow);
 
@@ -1347,22 +1347,16 @@ e_reflow_update (GnomeCanvasItem *item, gdouble affine[6], ArtSVP *clip_path, gi
 	}
 }
 
-static double
+static GnomeCanvasItem *
 e_reflow_point (GnomeCanvasItem *item,
-		gdouble x, gdouble y, gint cx, gint cy,
-		GnomeCanvasItem **actual_item)
+		gdouble x, gdouble y, gint cx, gint cy)
 {
-	gdouble distance = 1;
-
-	*actual_item = NULL;
+        GnomeCanvasItem *child;
 
 	if (GNOME_CANVAS_ITEM_CLASS (e_reflow_parent_class)->point)
-		distance = GNOME_CANVAS_ITEM_CLASS (e_reflow_parent_class)->point (item, x, y, cx, cy, actual_item);
-	if ((gint) (distance * item->canvas->pixels_per_unit + 0.5) <= 0 && *actual_item)
-		return distance;
+		child = GNOME_CANVAS_ITEM_CLASS (e_reflow_parent_class)->point (item, x, y, cx, cy);
 
-	*actual_item = item;
-	return 0;
+	return child ? child : item;
 #if 0
 	if (y >= E_REFLOW_BORDER_WIDTH && y <= reflow->height - E_REFLOW_BORDER_WIDTH) {
 		gfloat n_x;
diff --git a/widgets/text/e-text.c b/widgets/text/e-text.c
index 378a8dfc0e..e58d5bf8a2 100644
--- a/widgets/text/e-text.c
+++ b/widgets/text/e-text.c
@@ -1620,9 +1620,9 @@ e_text_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
 }
 
 /* Point handler for the text item */
-static double
+static GnomeCanvasItem *
 e_text_point (GnomeCanvasItem *item, gdouble x, gdouble y,
-	      gint cx, gint cy, GnomeCanvasItem **actual_item)
+	      gint cx, gint cy)
 {
 	EText *text;
 	gdouble clip_width;
@@ -1630,8 +1630,6 @@ e_text_point (GnomeCanvasItem *item, gdouble x, gdouble y,
 
 	text = E_TEXT (item);
 
-	*actual_item = item;
-
 	/* The idea is to build bounding rectangles for each of the lines of
 	 * text (clipped by the clipping rectangle, if it is activated) and see
 	 * whether the point is inside any of these.  If it is, we are done.
@@ -1656,17 +1654,17 @@ e_text_point (GnomeCanvasItem *item, gdouble x, gdouble y,
 	    cx > text->clip_cx + clip_width ||
 	    cy < text->clip_cy ||
 	    cy > text->clip_cy + clip_height)
-		return 1;
+		return NULL;
 
 	if (text->fill_clip_rectangle || !text->text || !*text->text)
-		return 0;
+		return item;
 
 	cx -= text->cx;
 
 	if (pango_layout_xy_to_index (text->layout, cx, cy, NULL, NULL))
-		return 0;
+		return item;
 
-	return 1;
+	return NULL;
 }
 
 /* Bounds handler for the text item */