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gtk-demo: Move the blur demo code here
We want to remove this from the GtkOverlay code.
This commit is contained in:
Matthias Clasen
parent
6711aa2a4e
commit
b70cd64d6d
482
demos/gtk-demo/bluroverlay.c
Normal file
482
demos/gtk-demo/bluroverlay.c
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@ -0,0 +1,482 @@
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/*
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* bluroverlay.c
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* This file is part of gtk
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*
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* Copyright (C) 2011 - Ignacio Casal Quinteiro, Mike Krüger
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "bluroverlay.h"
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/*
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* This is a cut-down copy of gtkoverlay.c with a custom snapshot
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* function that support a limited form of blur-under.
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*/
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typedef struct _BlurOverlayChild BlurOverlayChild;
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struct _BlurOverlayChild
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{
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double blur;
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};
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enum {
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GET_CHILD_POSITION,
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LAST_SIGNAL
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};
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static guint signals[LAST_SIGNAL] = { 0 };
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static GQuark child_data_quark = 0;
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G_DEFINE_TYPE (BlurOverlay, blur_overlay, GTK_TYPE_BIN)
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static void
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blur_overlay_set_overlay_child (GtkWidget *widget,
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BlurOverlayChild *child_data)
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{
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g_object_set_qdata_full (G_OBJECT (widget), child_data_quark, child_data, g_free);
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}
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static BlurOverlayChild *
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blur_overlay_get_overlay_child (GtkWidget *widget)
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{
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return (BlurOverlayChild *) g_object_get_qdata (G_OBJECT (widget), child_data_quark);
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}
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static void
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blur_overlay_measure (GtkWidget *widget,
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GtkOrientation orientation,
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int for_size,
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int *minimum,
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int *natural,
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int *minimum_baseline,
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int *natural_baseline)
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{
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GtkWidget *child;
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for (child = gtk_widget_get_first_child (widget);
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child != NULL;
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child = gtk_widget_get_next_sibling (child))
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{
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int child_min, child_nat, child_min_baseline, child_nat_baseline;
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gtk_widget_measure (child,
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orientation,
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for_size,
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&child_min, &child_nat,
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&child_min_baseline, &child_nat_baseline);
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*minimum = MAX (*minimum, child_min);
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*natural = MAX (*natural, child_nat);
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if (child_min_baseline > -1)
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*minimum_baseline = MAX (*minimum_baseline, child_min_baseline);
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if (child_nat_baseline > -1)
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*natural_baseline = MAX (*natural_baseline, child_nat_baseline);
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}
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}
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static void
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blur_overlay_compute_child_allocation (BlurOverlay *overlay,
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GtkWidget *widget,
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BlurOverlayChild *child,
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GtkAllocation *widget_allocation)
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{
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GtkAllocation allocation;
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gboolean result;
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g_signal_emit (overlay, signals[GET_CHILD_POSITION],
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0, widget, &allocation, &result);
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widget_allocation->x = allocation.x;
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widget_allocation->y = allocation.y;
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widget_allocation->width = allocation.width;
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widget_allocation->height = allocation.height;
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}
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static GtkAlign
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effective_align (GtkAlign align,
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GtkTextDirection direction)
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{
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switch (align)
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{
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case GTK_ALIGN_START:
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return direction == GTK_TEXT_DIR_RTL ? GTK_ALIGN_END : GTK_ALIGN_START;
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case GTK_ALIGN_END:
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return direction == GTK_TEXT_DIR_RTL ? GTK_ALIGN_START : GTK_ALIGN_END;
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case GTK_ALIGN_FILL:
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case GTK_ALIGN_CENTER:
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case GTK_ALIGN_BASELINE:
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default:
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return align;
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}
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}
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static void
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blur_overlay_child_update_style_classes (BlurOverlay *overlay,
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GtkWidget *child,
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GtkAllocation *child_allocation)
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{
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int width, height;
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GtkAlign valign, halign;
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gboolean is_left, is_right, is_top, is_bottom;
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gboolean has_left, has_right, has_top, has_bottom;
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GtkStyleContext *context;
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context = gtk_widget_get_style_context (child);
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has_left = gtk_style_context_has_class (context, GTK_STYLE_CLASS_LEFT);
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has_right = gtk_style_context_has_class (context, GTK_STYLE_CLASS_RIGHT);
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has_top = gtk_style_context_has_class (context, GTK_STYLE_CLASS_TOP);
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has_bottom = gtk_style_context_has_class (context, GTK_STYLE_CLASS_BOTTOM);
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is_left = is_right = is_top = is_bottom = FALSE;
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width = gtk_widget_get_width (GTK_WIDGET (overlay));
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height = gtk_widget_get_height (GTK_WIDGET (overlay));
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halign = effective_align (gtk_widget_get_halign (child),
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gtk_widget_get_direction (child));
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if (halign == GTK_ALIGN_START)
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is_left = (child_allocation->x == 0);
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else if (halign == GTK_ALIGN_END)
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is_right = (child_allocation->x + child_allocation->width == width);
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valign = gtk_widget_get_valign (child);
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if (valign == GTK_ALIGN_START)
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is_top = (child_allocation->y == 0);
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else if (valign == GTK_ALIGN_END)
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is_bottom = (child_allocation->y + child_allocation->height == height);
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if (has_left && !is_left)
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gtk_style_context_remove_class (context, GTK_STYLE_CLASS_LEFT);
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else if (!has_left && is_left)
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gtk_style_context_add_class (context, GTK_STYLE_CLASS_LEFT);
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if (has_right && !is_right)
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gtk_style_context_remove_class (context, GTK_STYLE_CLASS_RIGHT);
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else if (!has_right && is_right)
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gtk_style_context_add_class (context, GTK_STYLE_CLASS_RIGHT);
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if (has_top && !is_top)
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gtk_style_context_remove_class (context, GTK_STYLE_CLASS_TOP);
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else if (!has_top && is_top)
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gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP);
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if (has_bottom && !is_bottom)
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gtk_style_context_remove_class (context, GTK_STYLE_CLASS_BOTTOM);
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else if (!has_bottom && is_bottom)
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gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM);
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}
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static void
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blur_overlay_child_allocate (BlurOverlay *overlay,
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GtkWidget *widget,
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BlurOverlayChild *child)
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{
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GtkAllocation child_allocation;
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if (!gtk_widget_get_visible (widget))
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return;
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blur_overlay_compute_child_allocation (overlay, widget, child, &child_allocation);
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blur_overlay_child_update_style_classes (overlay, widget, &child_allocation);
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gtk_widget_size_allocate (widget, &child_allocation, -1);
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}
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static void
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blur_overlay_size_allocate (GtkWidget *widget,
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int width,
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int height,
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int baseline)
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{
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BlurOverlay *overlay = BLUR_OVERLAY (widget);
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GtkWidget *child;
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GtkWidget *main_widget;
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main_widget = gtk_bin_get_child (GTK_BIN (overlay));
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if (main_widget && gtk_widget_get_visible (main_widget))
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gtk_widget_size_allocate (main_widget,
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&(GtkAllocation) {
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0, 0,
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width, height
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}, -1);
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for (child = gtk_widget_get_first_child (widget);
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child != NULL;
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child = gtk_widget_get_next_sibling (child))
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{
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if (child != main_widget)
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{
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BlurOverlayChild *child_data = blur_overlay_get_overlay_child (child);
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blur_overlay_child_allocate (overlay, child, child_data);
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}
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}
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}
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static gboolean
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blur_overlay_get_child_position (BlurOverlay *overlay,
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GtkWidget *widget,
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GtkAllocation *alloc)
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{
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GtkRequisition min, req;
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GtkAlign halign;
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GtkTextDirection direction;
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int width, height;
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gtk_widget_get_preferred_size (widget, &min, &req);
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width = gtk_widget_get_width (GTK_WIDGET (overlay));
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height = gtk_widget_get_height (GTK_WIDGET (overlay));
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alloc->x = 0;
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alloc->width = MAX (min.width, MIN (width, req.width));
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direction = gtk_widget_get_direction (widget);
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halign = gtk_widget_get_halign (widget);
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switch (effective_align (halign, direction))
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{
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case GTK_ALIGN_START:
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/* nothing to do */
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break;
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case GTK_ALIGN_FILL:
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alloc->width = MAX (alloc->width, width);
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break;
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case GTK_ALIGN_CENTER:
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alloc->x += width / 2 - alloc->width / 2;
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break;
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case GTK_ALIGN_END:
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alloc->x += width - alloc->width;
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break;
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case GTK_ALIGN_BASELINE:
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default:
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g_assert_not_reached ();
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break;
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}
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alloc->y = 0;
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alloc->height = MAX (min.height, MIN (height, req.height));
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switch (gtk_widget_get_valign (widget))
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{
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case GTK_ALIGN_START:
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/* nothing to do */
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break;
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case GTK_ALIGN_FILL:
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alloc->height = MAX (alloc->height, height);
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break;
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case GTK_ALIGN_CENTER:
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alloc->y += height / 2 - alloc->height / 2;
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break;
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case GTK_ALIGN_END:
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alloc->y += height - alloc->height;
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break;
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case GTK_ALIGN_BASELINE:
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default:
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g_assert_not_reached ();
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break;
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}
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return TRUE;
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}
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static void
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blur_overlay_add (GtkContainer *container,
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GtkWidget *widget)
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{
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BlurOverlay *overlay = BLUR_OVERLAY (container);
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gtk_widget_insert_after (widget, GTK_WIDGET (container), NULL);
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overlay->main_widget = widget;
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}
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static void
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blur_overlay_remove (GtkContainer *container,
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GtkWidget *widget)
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{
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BlurOverlay *overlay = BLUR_OVERLAY (container);
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gtk_widget_unparent (widget);
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if (overlay->main_widget == widget)
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overlay->main_widget = NULL;
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}
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static void
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blur_overlay_forall (GtkContainer *overlay,
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GtkCallback callback,
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gpointer callback_data)
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{
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GtkWidget *child;
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child = gtk_widget_get_first_child (GTK_WIDGET (overlay));
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while (child != NULL)
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{
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GtkWidget *next = gtk_widget_get_next_sibling (child);
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(* callback) (child, callback_data);
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child = next;
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}
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}
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static void
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blur_overlay_snapshot (GtkWidget *widget,
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GtkSnapshot *snapshot)
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{
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GtkWidget *main_widget;
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GskRenderNode *main_widget_node = NULL;
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GtkWidget *child;
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GtkAllocation main_alloc;
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cairo_region_t *clip = NULL;
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int i;
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main_widget = BLUR_OVERLAY (widget)->main_widget;
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gtk_widget_get_allocation (widget, &main_alloc);
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for (child = gtk_widget_get_first_child (widget);
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child != NULL;
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child = gtk_widget_get_next_sibling (child))
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{
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BlurOverlayChild *child_info = blur_overlay_get_overlay_child (child);
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double blur = 0;
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if (child_info)
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blur = child_info->blur;
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if (blur > 0)
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{
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GtkAllocation alloc;
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graphene_rect_t bounds;
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if (main_widget_node == NULL)
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{
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GtkSnapshot *child_snapshot;
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child_snapshot = gtk_snapshot_new ();
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gtk_widget_snapshot_child (widget, main_widget, child_snapshot);
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main_widget_node = gtk_snapshot_free_to_node (child_snapshot);
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}
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gtk_widget_get_allocation (child, &alloc);
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graphene_rect_init (&bounds, alloc.x, alloc.y, alloc.width, alloc.height);
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gtk_snapshot_push_blur (snapshot, blur);
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gtk_snapshot_push_clip (snapshot, &bounds);
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gtk_snapshot_append_node (snapshot, main_widget_node);
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gtk_snapshot_pop (snapshot);
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gtk_snapshot_pop (snapshot);
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if (clip == NULL)
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{
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cairo_rectangle_int_t rect;
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rect.x = rect.y = 0;
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rect.width = main_alloc.width;
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rect.height = main_alloc.height;
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clip = cairo_region_create_rectangle (&rect);
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}
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cairo_region_subtract_rectangle (clip, (cairo_rectangle_int_t *)&alloc);
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}
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}
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if (clip == NULL)
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{
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for (child = gtk_widget_get_first_child (widget);
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child != NULL;
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child = gtk_widget_get_next_sibling (child))
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{
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gtk_widget_snapshot_child (widget, child, snapshot);
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}
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return;
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}
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for (i = 0; i < cairo_region_num_rectangles (clip); i++)
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{
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cairo_rectangle_int_t rect;
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graphene_rect_t bounds;
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cairo_region_get_rectangle (clip, i, &rect);
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graphene_rect_init (&bounds, rect.x, rect.y, rect.width, rect.height);
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gtk_snapshot_push_clip (snapshot, &bounds);
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gtk_snapshot_append_node (snapshot, main_widget_node);
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gtk_snapshot_pop (snapshot);
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}
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cairo_region_destroy (clip);
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for (child = gtk_widget_get_first_child (widget);
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child != NULL;
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child = gtk_widget_get_next_sibling (child))
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{
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if (child != main_widget)
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gtk_widget_snapshot_child (widget, child, snapshot);
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}
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gsk_render_node_unref (main_widget_node);
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}
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static void
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blur_overlay_class_init (BlurOverlayClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
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GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
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widget_class->measure = blur_overlay_measure;
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widget_class->size_allocate = blur_overlay_size_allocate;
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widget_class->snapshot = blur_overlay_snapshot;
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container_class->add = blur_overlay_add;
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container_class->remove = blur_overlay_remove;
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container_class->forall = blur_overlay_forall;
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klass->get_child_position = blur_overlay_get_child_position;
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signals[GET_CHILD_POSITION] =
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g_signal_new ("get-child-position",
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G_TYPE_FROM_CLASS (object_class),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (BlurOverlayClass, get_child_position),
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g_signal_accumulator_true_handled, NULL,
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NULL,
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G_TYPE_BOOLEAN, 2,
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GTK_TYPE_WIDGET,
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GDK_TYPE_RECTANGLE | G_SIGNAL_TYPE_STATIC_SCOPE);
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child_data_quark = g_quark_from_static_string ("gtk-overlay-child-data");
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gtk_widget_class_set_css_name (widget_class, "overlay");
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}
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static void
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blur_overlay_init (BlurOverlay *overlay)
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{
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gtk_widget_set_has_surface (GTK_WIDGET (overlay), FALSE);
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}
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GtkWidget *
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blur_overlay_new (void)
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{
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return g_object_new (BLUR_TYPE_OVERLAY, NULL);
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}
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void
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blur_overlay_add_overlay (BlurOverlay *overlay,
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GtkWidget *widget,
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double blur)
|
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{
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BlurOverlayChild *child = g_new0 (BlurOverlayChild, 1);
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|
||||
gtk_widget_insert_before (widget, GTK_WIDGET (overlay), NULL);
|
||||
|
||||
child->blur = blur;
|
||||
|
||||
blur_overlay_set_overlay_child (widget, child);
|
||||
}
|
||||
65
demos/gtk-demo/bluroverlay.h
Normal file
65
demos/gtk-demo/bluroverlay.h
Normal file
@ -0,0 +1,65 @@
|
||||
/*
|
||||
* bluroverlay.h
|
||||
* This file is part of gtk
|
||||
*
|
||||
* Copyright (C) 2011 - Ignacio Casal Quinteiro, Mike Krüger
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#ifndef __BLUR_OVERLAY_H__
|
||||
#define __BLUR_OVERLAY_H__
|
||||
|
||||
#include <gtk/gtk.h>
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
#define BLUR_TYPE_OVERLAY (blur_overlay_get_type ())
|
||||
#define BLUR_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), BLUR_TYPE_OVERLAY, BlurOverlay))
|
||||
#define BLUR_OVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), BLUR_TYPE_OVERLAY, BlurOverlayClass))
|
||||
#define BLUR_IS_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), BLUR_TYPE_OVERLAY))
|
||||
#define BLUR_IS_OVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), BLUR_TYPE_OVERLAY))
|
||||
#define BLUR_OVERLAY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), BLUR_TYPE_OVERLAY, BlurOverlayClass))
|
||||
|
||||
typedef struct _BlurOverlay BlurOverlay;
|
||||
typedef struct _BlurOverlayClass BlurOverlayClass;
|
||||
|
||||
struct _BlurOverlay
|
||||
{
|
||||
GtkBin parent_instance;
|
||||
|
||||
GtkWidget *main_widget;
|
||||
};
|
||||
|
||||
struct _BlurOverlayClass
|
||||
{
|
||||
GtkBinClass parent_class;
|
||||
|
||||
gboolean (*get_child_position) (BlurOverlay *overlay,
|
||||
GtkWidget *widget,
|
||||
GtkAllocation *allocation);
|
||||
};
|
||||
|
||||
GDK_AVAILABLE_IN_ALL
|
||||
GType blur_overlay_get_type (void) G_GNUC_CONST;
|
||||
GDK_AVAILABLE_IN_ALL
|
||||
GtkWidget *blur_overlay_new (void);
|
||||
GDK_AVAILABLE_IN_ALL
|
||||
void blur_overlay_add_overlay (BlurOverlay *overlay,
|
||||
GtkWidget *widget,
|
||||
double blur);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
#endif /* __BLUR_OVERLAY_H__ */
|
||||
@ -247,6 +247,7 @@
|
||||
</gresource>
|
||||
<gresource prefix="/transparent">
|
||||
<file>portland-rose.jpg</file>
|
||||
<file>bluroverlay.c</file>
|
||||
</gresource>
|
||||
<gresource prefix="/markup">
|
||||
<file>markup.txt</file>
|
||||
|
||||
@ -75,7 +75,7 @@ demos = files([
|
||||
|
||||
gtkdemo_deps = [ libgtk_dep, ]
|
||||
|
||||
extra_demo_sources = files(['main.c', 'gtkfishbowl.c', 'fontplane.c', 'gtkgears.c', 'puzzlepiece.c'])
|
||||
extra_demo_sources = files(['main.c', 'gtkfishbowl.c', 'fontplane.c', 'gtkgears.c', 'puzzlepiece.c', 'bluroverlay.c'])
|
||||
|
||||
if harfbuzz_dep.found() and pangoft_dep.found()
|
||||
demos += files('font_features.c')
|
||||
|
||||
@ -4,6 +4,7 @@
|
||||
*/
|
||||
|
||||
#include <gtk/gtk.h>
|
||||
#include "bluroverlay.h"
|
||||
|
||||
GtkWidget *
|
||||
do_transparent (GtkWidget *do_widget)
|
||||
@ -27,7 +28,7 @@ do_transparent (GtkWidget *do_widget)
|
||||
|
||||
gtk_window_set_title (GTK_WINDOW (window), "Transparency");
|
||||
|
||||
overlay = gtk_overlay_new ();
|
||||
overlay = blur_overlay_new ();
|
||||
gtk_container_add (GTK_CONTAINER (window), overlay);
|
||||
|
||||
button = gtk_button_new_with_label ("Don't click this button!");
|
||||
@ -38,8 +39,7 @@ do_transparent (GtkWidget *do_widget)
|
||||
gtk_widget_set_halign (button, GTK_ALIGN_FILL);
|
||||
gtk_widget_set_valign (button, GTK_ALIGN_START);
|
||||
|
||||
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), button);
|
||||
gtk_container_child_set (GTK_CONTAINER (overlay), button, "blur", 5.0, NULL);
|
||||
blur_overlay_add_overlay (BLUR_OVERLAY (overlay), button, 5.0);
|
||||
|
||||
button = gtk_button_new_with_label ("Maybe this one?");
|
||||
label = gtk_bin_get_child (GTK_BIN (button));
|
||||
@ -49,8 +49,7 @@ do_transparent (GtkWidget *do_widget)
|
||||
gtk_widget_set_halign (button, GTK_ALIGN_FILL);
|
||||
gtk_widget_set_valign (button, GTK_ALIGN_END);
|
||||
|
||||
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), button);
|
||||
gtk_container_child_set (GTK_CONTAINER (overlay), button, "blur", 5.0, NULL);
|
||||
blur_overlay_add_overlay (BLUR_OVERLAY (overlay), button, 5.0);
|
||||
|
||||
picture = gtk_picture_new_for_resource ("/transparent/portland-rose.jpg");
|
||||
gtk_container_add (GTK_CONTAINER (overlay), picture);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user