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Refactor gtk_widget_pick

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Split this into a recursive part and a public
entry point. This lets us avoid some duplicate
checks.
This commit is contained in:
Matthias Clasen 2020-01-19 00:41:45 -05:00
parent ce1f1f7dec
commit cec4c15f05
1 changed files with 55 additions and 43 deletions
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98
gtk/gtkwidget.c
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@ -10481,44 +10481,19 @@ gtk_widget_can_be_picked (GtkWidget *widget,
return TRUE;
}
/**
* gtk_widget_pick:
* @widget: the widget to query
* @x: X coordinate to test, relative to @widget's origin
* @y: Y coordinate to test, relative to @widget's origin
* @flags: Flags to influence what is picked
*
* Finds the descendant of @widget (including @widget itself) closest
* to the screen at the point (@x, @y). The point must be given in
* widget coordinates, so (0, 0) is assumed to be the top left of
* @widget's content area.
*
* Usually widgets will return %NULL if the given coordinate is not
* contained in @widget checked via gtk_widget_contains(). Otherwise
* they will recursively try to find a child that does not return %NULL.
* Widgets are however free to customize their picking algorithm.
*
* This function is used on the toplevel to determine the widget below
* the mouse cursor for purposes of hover hilighting and delivering events.
*
* Returns: (nullable) (transfer none): The widget descendant at the given
* coordinate or %NULL if none.
**/
GtkWidget *
gtk_widget_pick (GtkWidget *widget,
gdouble x,
gdouble y,
GtkPickFlags flags)
static GtkWidget *
gtk_widget_do_pick (GtkWidget *widget,
gdouble x,
gdouble y,
GtkPickFlags flags)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkWidget *child;
GtkCssBoxes boxes;
if (!gtk_widget_can_be_picked (widget, flags))
return NULL;
if (priv->overflow == GTK_OVERFLOW_HIDDEN)
{
GtkCssBoxes boxes;
gtk_css_boxes_init (&boxes, widget);
if (!gsk_rounded_rect_contains_point (gtk_css_boxes_get_padding_box (&boxes),
@ -10526,15 +10501,6 @@ gtk_widget_pick (GtkWidget *widget,
return NULL;
}
if (GTK_IS_WINDOW (widget))
{
GtkWidget *picked;
picked = gtk_window_pick_popover (GTK_WINDOW (widget), x, y, flags);
if (picked)
return picked;
}
for (child = _gtk_widget_get_last_child (widget);
child;
child = _gtk_widget_get_prev_sibling (child))
@ -10572,17 +10538,63 @@ gtk_widget_pick (GtkWidget *widget,
graphene_point3d_interpolate (&p0, &p1, p0.z / (p0.z - p1.z), &res);
picked = gtk_widget_pick (child, res.x, res.y, flags);
picked = gtk_widget_do_pick (child, res.x, res.y, flags);
if (picked)
return picked;
}
if (!gtk_widget_contains (widget, x, y))
if (!GTK_WIDGET_GET_CLASS (widget)->contains (widget, x, y))
return NULL;
return widget;
}
/**
* gtk_widget_pick:
* @widget: the widget to query
* @x: X coordinate to test, relative to @widget's origin
* @y: Y coordinate to test, relative to @widget's origin
* @flags: Flags to influence what is picked
*
* Finds the descendant of @widget (including @widget itself) closest
* to the screen at the point (@x, @y). The point must be given in
* widget coordinates, so (0, 0) is assumed to be the top left of
* @widget's content area.
*
* Usually widgets will return %NULL if the given coordinate is not
* contained in @widget checked via gtk_widget_contains(). Otherwise
* they will recursively try to find a child that does not return %NULL.
* Widgets are however free to customize their picking algorithm.
*
* This function is used on the toplevel to determine the widget below
* the mouse cursor for purposes of hover hilighting and delivering events.
*
* Returns: (nullable) (transfer none): The widget descendant at the given
* coordinate or %NULL if none.
**/
GtkWidget *
gtk_widget_pick (GtkWidget *widget,
gdouble x,
gdouble y,
GtkPickFlags flags)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
if (!gtk_widget_can_be_picked (widget, flags))
return NULL;
if (GTK_IS_WINDOW (widget))
{
GtkWidget *picked;
picked = gtk_window_pick_popover (GTK_WINDOW (widget), x, y, flags);
if (picked)
return picked;
}
return gtk_widget_do_pick (widget, x, y, flags);
}
/**
* gtk_widget_compute_transform:
* @widget: a #GtkWidget