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gadget: add hit test functions

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These will be useful in later commits.
This commit is contained in:
Cosimo Cecchi 2016-01-19 07:21:46 -02:00
parent 8c43b3ee60
commit e9fe46ea5f
2 changed files with 122 additions and 11 deletions
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123
gtk/gtkcssgadget.c
View File

@ -488,6 +488,110 @@ get_box_padding (GtkCssStyle *style,
border->right = get_number (style, GTK_CSS_PROPERTY_PADDING_RIGHT);
}
static gboolean
allocation_contains_point (GtkAllocation *allocation,
gint x,
gint y)
{
return (x >= allocation->x) &&
(x < allocation->x + allocation->width) &&
(y >= allocation->y) &&
(y < allocation->y + allocation->height);
}
static void
shift_allocation (GtkCssGadget *gadget,
GtkAllocation *allocation)
{
GtkCssGadgetPrivate *priv = gtk_css_gadget_get_instance_private (gadget);
if (priv->owner && !gtk_widget_get_has_window (priv->owner))
{
GtkAllocation widget_alloc;
gtk_widget_get_allocation (priv->owner, &widget_alloc);
allocation->x -= widget_alloc.x;
allocation->y -= widget_alloc.y;
}
}
/**
* gtk_css_gadget_margin_box_contains_point:
* @gadget: the #GtkCssGadget being tested
* @x: X coordinate of the testing point
* @y: Y coordinate of the testing point
*
* Checks whether the point at the provided coordinates is contained within the
* margin box of the gadget. The (X, Y) are relative to the gadget
* origin.
*
* Returns: %TRUE if the point at (X, Y) is contained within the margin
* box of the @gadget.
*/
gboolean
gtk_css_gadget_margin_box_contains_point (GtkCssGadget *gadget,
int x,
int y)
{
GtkAllocation margin_allocation;
gtk_css_gadget_get_margin_allocation (gadget, &margin_allocation, NULL);
shift_allocation (gadget, &margin_allocation);
return allocation_contains_point (&margin_allocation, x, y);
}
/**
* gtk_css_gadget_border_box_contains_point:
* @gadget: the #GtkCssGadget being tested
* @x: X coordinate of the testing point
* @y: Y coordinate of the testing point
*
* Checks whether the point at the provided coordinates is contained within the
* border box of the gadget. The (X, Y) are relative to the gadget
* origin.
*
* Returns: %TRUE if the point at (X, Y) is contained within the border
* box of the @gadget.
*/
gboolean
gtk_css_gadget_border_box_contains_point (GtkCssGadget *gadget,
int x,
int y)
{
GtkAllocation border_allocation;
gtk_css_gadget_get_border_allocation (gadget, &border_allocation, NULL);
shift_allocation (gadget, &border_allocation);
return allocation_contains_point (&border_allocation, x, y);
}
/**
* gtk_css_gadget_content_box_contains_point:
* @gadget: the #GtkCssGadget being tested
* @x: X coordinate of the testing point
* @y: Y coordinate of the testing point
*
* Checks whether the point at the provided coordinates is contained within the
* content box of the gadget. The (X, Y) are relative to the gadget
* origin.
*
* Returns: %TRUE if the point at (X, Y) is contained within the content
* box of the @gadget.
*/
gboolean
gtk_css_gadget_content_box_contains_point (GtkCssGadget *gadget,
int x,
int y)
{
GtkAllocation content_allocation;
gtk_css_gadget_get_content_allocation (gadget, &content_allocation, NULL);
shift_allocation (gadget, &content_allocation);
return allocation_contains_point (&content_allocation, x, y);
}
/**
* gtk_css_gadget_get_preferred_size:
* @gadget: the #GtkCssGadget whose size is requested
@ -715,21 +819,18 @@ gtk_css_gadget_draw (GtkCssGadget *gadget,
GtkCssStyle *style;
int x, y, width, height;
int contents_x, contents_y, contents_width, contents_height;
GtkAllocation margin_allocation;
if (!gtk_css_gadget_get_visible (gadget))
return;
x = priv->allocated_size.x;
y = priv->allocated_size.y;
if (priv->owner && !gtk_widget_get_has_window (priv->owner))
{
GtkAllocation widget_alloc;
gtk_widget_get_allocation (priv->owner, &widget_alloc);
x -= widget_alloc.x;
y -= widget_alloc.y;
}
width = priv->allocated_size.width;
height = priv->allocated_size.height;
gtk_css_gadget_get_margin_allocation (gadget, &margin_allocation, NULL);
shift_allocation (gadget, &margin_allocation);
x = margin_allocation.x;
y = margin_allocation.y;
width = margin_allocation.width;
height = margin_allocation.height;
if (width < 0 || height < 0)
{

10
gtk/gtkcssgadgetprivate.h
View File

@ -84,6 +84,16 @@ void gtk_css_gadget_set_visible (GtkCssGadget
gboolean visible);
gboolean gtk_css_gadget_get_visible (GtkCssGadget *gadget);
gboolean gtk_css_gadget_margin_box_contains_point (GtkCssGadget *gadget,
int x,
int y);
gboolean gtk_css_gadget_border_box_contains_point (GtkCssGadget *gadget,
int x,
int y);
gboolean gtk_css_gadget_content_box_contains_point (GtkCssGadget *gadget,
int x,
int y);
void gtk_css_gadget_add_class (GtkCssGadget *gadget,
const char *name);
void gtk_css_gadget_remove_class (GtkCssGadget *gadget,