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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimphighlightablebutton.c
* Copyright (C) 2018 Ell
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "widgets-types.h"
#include "core/gimp-cairo.h"
#include "gimphighlightablebutton.h"
#define DEFAULT_HIGHLIGHT_COLOR {0.20, 0.70, 0.20, 0.65}
#define PADDING 1
#define BORDER_WIDTH 1
#define CORNER_RADIUS 2
#define REV (2.0 * G_PI)
enum
{
PROP_0,
PROP_HIGHLIGHT,
PROP_HIGHLIGHT_COLOR
};
struct _GimpHighlightableButtonPrivate
{
gboolean highlight;
GimpRGB highlight_color;
};
static void gimp_highlightable_button_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_highlightable_button_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gboolean gimp_highlightable_button_expose_event (GtkWidget *widget,
GdkEventExpose *event);
G_DEFINE_TYPE_WITH_PRIVATE (GimpHighlightableButton, gimp_highlightable_button,
GIMP_TYPE_BUTTON)
#define parent_class gimp_highlightable_button_parent_class
static void
gimp_highlightable_button_class_init (GimpHighlightableButtonClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->get_property = gimp_highlightable_button_get_property;
object_class->set_property = gimp_highlightable_button_set_property;
widget_class->expose_event = gimp_highlightable_button_expose_event;
g_object_class_install_property (object_class, PROP_HIGHLIGHT,
g_param_spec_boolean ("highlight",
NULL, NULL,
FALSE,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_HIGHLIGHT_COLOR,
gimp_param_spec_rgb ("highlight-color",
NULL, NULL,
TRUE,
&(GimpRGB) DEFAULT_HIGHLIGHT_COLOR,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
}
static void
gimp_highlightable_button_init (GimpHighlightableButton *button)
{
button->priv = gimp_highlightable_button_get_instance_private (button);
}
static void
gimp_highlightable_button_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpHighlightableButton *button = GIMP_HIGHLIGHTABLE_BUTTON (object);
switch (property_id)
{
case PROP_HIGHLIGHT:
gimp_highlightable_button_set_highlight (button,
g_value_get_boolean (value));
break;
case PROP_HIGHLIGHT_COLOR:
gimp_highlightable_button_set_highlight_color (button,
g_value_get_boxed (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_highlightable_button_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpHighlightableButton *button = GIMP_HIGHLIGHTABLE_BUTTON (object);
switch (property_id)
{
case PROP_HIGHLIGHT:
g_value_set_boolean (value, button->priv->highlight);
break;
case PROP_HIGHLIGHT_COLOR:
g_value_set_boxed (value, &button->priv->highlight_color);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gboolean
gimp_highlightable_button_expose_event (GtkWidget *widget,
GdkEventExpose *event)
{
GimpHighlightableButton *button = GIMP_HIGHLIGHTABLE_BUTTON (widget);
if (button->priv->highlight)
{
if (gtk_widget_is_drawable (widget))
{
GtkStyle *style = gtk_widget_get_style (widget);
GtkStateType state = gtk_widget_get_state (widget);
GtkAllocation allocation;
gboolean border;
gdouble lightness;
gdouble opacity;
gdouble x;
gdouble y;
gdouble width;
gdouble height;
cairo_t *cr;
gtk_widget_get_allocation (widget, &allocation);
border =
(state == GTK_STATE_ACTIVE ||
state == GTK_STATE_PRELIGHT ||
gtk_button_get_relief (GTK_BUTTON (button)) == GTK_RELIEF_NORMAL);
lightness = 1.00;
opacity = 1.00;
switch (state)
{
case GTK_STATE_ACTIVE: lightness = 0.80; break;
case GTK_STATE_PRELIGHT: lightness = 1.25; break;
case GTK_STATE_INSENSITIVE: opacity = 0.50; break;
default: break;
}
x = allocation.x + PADDING;
y = allocation.y + PADDING;
width = allocation.width - 2.0 * PADDING;
height = allocation.height - 2.0 * PADDING;
if (border)
{
x += BORDER_WIDTH / 2.0;
y += BORDER_WIDTH / 2.0;
width -= BORDER_WIDTH;
height -= BORDER_WIDTH;
}
cr = gdk_cairo_create (event->window);
gdk_cairo_region (cr, event->region);
cairo_clip (cr);
cairo_set_source_rgba (cr,
button->priv->highlight_color.r * lightness,
button->priv->highlight_color.g * lightness,
button->priv->highlight_color.b * lightness,
button->priv->highlight_color.a * opacity);
gimp_cairo_rounded_rectangle (cr,
x, y, width, height, CORNER_RADIUS);
cairo_fill_preserve (cr);
if (border)
{
gdk_cairo_set_source_color (cr, &style->fg[state]);
cairo_set_line_width (cr, BORDER_WIDTH);
cairo_stroke (cr);
}
cairo_destroy (cr);
if (gtk_widget_has_focus (widget))
{
gboolean interior_focus;
gint focus_width;
gint focus_pad;
gint child_displacement_x;
gint child_displacement_y;
gboolean displace_focus;
gint x;
gint y;
gint width;
gint height;
gtk_widget_style_get (widget,
"interior-focus", &interior_focus,
"focus-line-width", &focus_width,
"focus-padding", &focus_pad,
"child-displacement-y", &child_displacement_y,
"child-displacement-x", &child_displacement_x,
"displace-focus", &displace_focus,
NULL);
x = allocation.x + PADDING;
y = allocation.y + PADDING;
width = allocation.width - 2 * PADDING;
height = allocation.height - 2 * PADDING;
if (interior_focus)
{
x += style->xthickness + focus_pad;
y += style->ythickness + focus_pad;
width -= 2 * (style->xthickness + focus_pad);
height -= 2 * (style->ythickness + focus_pad);
}
else
{
x -= focus_width + focus_pad;
y -= focus_width + focus_pad;
width += 2 * (focus_width + focus_pad);
height += 2 * (focus_width + focus_pad);
}
if (state == GTK_STATE_ACTIVE && displace_focus)
{
x += child_displacement_x;
y += child_displacement_y;
}
gtk_paint_focus (style, gtk_widget_get_window (widget), state,
&event->area, widget, "button",
x, y, width, height);
}
gtk_container_propagate_expose (GTK_CONTAINER (button),
gtk_bin_get_child (GTK_BIN (button)),
event);
}
return FALSE;
}
else
{
return GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
}
}
/* public functions */
GtkWidget *
gimp_highlightable_button_new (void)
{
return g_object_new (GIMP_TYPE_HIGHLIGHTABLE_BUTTON, NULL);
}
void
gimp_highlightable_button_set_highlight (GimpHighlightableButton *button,
gboolean highlight)
{
g_return_if_fail (GIMP_IS_HIGHLIGHTABLE_BUTTON (button));
if (button->priv->highlight != highlight)
{
button->priv->highlight = highlight;
gtk_widget_queue_draw (GTK_WIDGET (button));
g_object_notify (G_OBJECT (button), "highlight");
}
}
gboolean
gimp_highlightable_button_get_highlight (GimpHighlightableButton *button)
{
g_return_val_if_fail (GIMP_IS_HIGHLIGHTABLE_BUTTON (button), FALSE);
return button->priv->highlight;
}
void
gimp_highlightable_button_set_highlight_color (GimpHighlightableButton *button,
const GimpRGB *color)
{
g_return_if_fail (GIMP_IS_HIGHLIGHTABLE_BUTTON (button));
g_return_if_fail (color != NULL);
if (memcmp (&button->priv->highlight_color, color, sizeof (GimpRGB)))
{
button->priv->highlight_color = *color;
if (button->priv->highlight)
gtk_widget_queue_draw (GTK_WIDGET (button));
g_object_notify (G_OBJECT (button), "highlight-color");
}
}
void
gimp_highlightable_button_get_highlight_color (GimpHighlightableButton *button,
GimpRGB *color)
{
g_return_if_fail (GIMP_IS_HIGHLIGHTABLE_BUTTON (button));
g_return_if_fail (color != NULL);
*color = button->priv->highlight_color;
}
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