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snapshot: Add gtk_css_gadget_snapshot()

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Including a snpahsot() vfunc, wee!
This commit is contained in:
Benjamin Otte 2016-11-13 20:47:34 +01:00
parent ae2477b1bc
commit 4e06d8f73c
4 changed files with 161 additions and 0 deletions
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142
gtk/gtkcssgadget.c
View File

@ -121,6 +121,51 @@ gtk_css_gadget_real_draw (GtkCssGadget *gadget,
return FALSE;
}
static void
gtk_css_gadget_get_clip (GtkCssGadget *gadget,
graphene_rect_t *bounds)
{
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);
graphene_rect_init (bounds,
priv->clip.x - widget_alloc.x, priv->clip.y - widget_alloc.y,
priv->clip.width, priv->clip.height);
}
else
{
graphene_rect_init (bounds,
priv->clip.x, priv->clip.y,
priv->clip.width, priv->clip.height);
}
}
static gboolean
gtk_css_gadget_real_snapshot (GtkCssGadget *gadget,
GtkSnapshot *snapshot,
int x,
int y,
int width,
int height)
{
graphene_rect_t bounds;
gboolean result;
cairo_t *cr;
gtk_css_gadget_get_clip (gadget, &bounds);
cr = gtk_snapshot_append_cairo_node (snapshot, &bounds, "Fallback<%s>", G_OBJECT_TYPE_NAME (gadget));
result = GTK_CSS_GADGET_GET_CLASS (gadget)->draw (gadget, cr, x, y, width, height);
cairo_destroy (cr);
return result;
}
static void
gtk_css_gadget_real_style_changed (GtkCssGadget *gadget,
GtkCssStyleChange *change)
@ -277,6 +322,7 @@ gtk_css_gadget_class_init (GtkCssGadgetClass *klass)
klass->get_preferred_size = gtk_css_gadget_real_get_preferred_size;
klass->allocate = gtk_css_gadget_real_allocate;
klass->draw = gtk_css_gadget_real_draw;
klass->snapshot = gtk_css_gadget_real_snapshot;
klass->get_render_node = gtk_css_gadget_real_get_render_node;
klass->style_changed = gtk_css_gadget_real_style_changed;
klass->has_content = gtk_css_gadget_has_content;
@ -1117,6 +1163,102 @@ gtk_css_gadget_draw (GtkCssGadget *gadget,
#endif
}
/**
* gtk_css_gadget_snapshot:
* @gadget: The gadget to snapshot
* @snapshot: The snapshot to use
*
* Will draw the gadget at the position allocated via
* gtk_css_gadget_allocate(). It is your responsibility to make
* sure that those 2 coordinate systems match.
*
* The drawing virtual function will be passed an untransformed @cr.
* This is important because functions like
* gtk_container_propagate_draw() depend on that.
*/
void
gtk_css_gadget_snapshot (GtkCssGadget *gadget,
GtkSnapshot *snapshot)
{
GtkCssGadgetPrivate *priv = gtk_css_gadget_get_instance_private (gadget);
GtkBorder margin, border, padding;
gboolean draw_focus = FALSE;
GtkCssStyle *style;
int x, y, width, height;
int contents_x, contents_y, contents_width, contents_height;
GtkAllocation margin_box;
graphene_rect_t bounds;
if (!gtk_css_gadget_get_visible (gadget))
return;
gtk_css_gadget_get_clip (gadget, &bounds);
if (gtk_snapshot_clips_rect (snapshot, &bounds))
return;
gtk_css_gadget_get_margin_box (gadget, &margin_box);
x = margin_box.x;
y = margin_box.y;
width = margin_box.width;
height = margin_box.height;
if (width < 0 || height < 0)
{
g_warning ("Drawing a gadget with negative dimensions. "
"Did you forget to allocate a size? (node %s owner %s)",
gtk_css_node_get_name (gtk_css_gadget_get_node (gadget)),
G_OBJECT_TYPE_NAME (gtk_css_gadget_get_owner (gadget)));
x = 0;
y = 0;
width = gtk_widget_get_allocated_width (priv->owner);
height = gtk_widget_get_allocated_height (priv->owner);
}
style = gtk_css_gadget_get_style (gadget);
get_box_margin (style, &margin);
get_box_border (style, &border);
get_box_padding (style, &padding);
gtk_snapshot_push (snapshot, &bounds, "%s<%s>", gtk_css_node_get_name (priv->node), G_OBJECT_TYPE_NAME (priv->owner));
gtk_snapshot_translate_2d (snapshot, x + margin.left, y + margin.top);
gtk_css_style_snapshot_background (style,
snapshot,
width - margin.left - margin.right,
height - margin.top - margin.bottom,
gtk_css_node_get_junction_sides (priv->node));
gtk_css_style_snapshot_border (style,
snapshot,
width - margin.left - margin.right,
height - margin.top - margin.bottom,
gtk_css_node_get_junction_sides (priv->node));
gtk_snapshot_translate_2d (snapshot, - x - margin.left, - y - margin.top);
contents_x = x + margin.left + border.left + padding.left;
contents_y = y + margin.top + border.top + padding.top;
contents_width = width - margin.left - margin.right - border.left - border.right - padding.left - padding.right;
contents_height = height - margin.top - margin.bottom - border.top - border.bottom - padding.top - padding.bottom;
if (contents_width > 0 && contents_height > 0)
draw_focus = GTK_CSS_GADGET_GET_CLASS (gadget)->snapshot (gadget,
snapshot,
contents_x, contents_y,
contents_width, contents_height);
if (draw_focus)
{
gtk_snapshot_translate_2d (snapshot, x + margin.left, y + margin.top);
gtk_css_style_snapshot_outline (style,
snapshot,
width - margin.left - margin.right,
height - margin.top - margin.bottom);
gtk_snapshot_translate_2d (snapshot, - x - margin.left, - y - margin.top);
}
gtk_snapshot_pop (snapshot);
}
GskRenderNode *
gtk_css_gadget_get_render_node (GtkCssGadget *gadget,
GskRenderer *renderer,

8
gtk/gtkcssgadgetprivate.h
View File

@ -67,6 +67,12 @@ struct _GtkCssGadgetClass
int y,
int width,
int height);
gboolean (* snapshot) (GtkCssGadget *gadget,
GtkSnapshot *snapshot,
int x,
int y,
int width,
int height);
GskRenderNode * (* get_render_node) (GtkCssGadget *gadget,
GskRenderer *renderer,
@ -130,6 +136,8 @@ void gtk_css_gadget_allocate (GtkCssGadget
GtkAllocation *out_clip);
void gtk_css_gadget_draw (GtkCssGadget *gadget,
cairo_t *cr);
void gtk_css_gadget_snapshot (GtkCssGadget *gadget,
GtkSnapshot *snapshot);
GskRenderNode * gtk_css_gadget_get_render_node (GtkCssGadget *gadget,
GskRenderer *renderer,

7
gtk/gtksnapshot.c
View File

@ -251,6 +251,13 @@ gtk_snapshot_push_cairo_node (GtkSnapshot *state,
return gsk_render_node_get_draw_context (node, state->renderer);
}
gboolean
gtk_snapshot_clips_rect (GtkSnapshot *snapshot,
const graphene_rect_t *bounds)
{
return FALSE;
}
void
gtk_snapshot_render_background (GtkSnapshot *state,
GtkStyleContext *context,

4
gtk/gtksnapshot.h
View File

@ -78,6 +78,10 @@ cairo_t * gtk_snapshot_append_cairo_node (GtkSnapshot
const char *name,
...) G_GNUC_PRINTF(3, 4);
GDK_AVAILABLE_IN_3_90
gboolean gtk_snapshot_clips_rect (GtkSnapshot *snapshot,
const graphene_rect_t *bounds);
GDK_AVAILABLE_IN_3_90
void gtk_snapshot_render_background (GtkSnapshot *state,
GtkStyleContext *context,