gtk2/gtk/gtkcolorscale.c
Matthias Clasen a51a6a3ee2 Deprecate GtkColorChooser and implementations
These are being replaced by GtkColorDialog
and GtkColorDialogButton.

This commit only moves the headers for GtkColorChooserWidget
and GtkColorChooserDialog to deprecated/, and keeps the
implementations in gtk/, since they will eventually be
salvaged into a private GtkColorChooserWindow.
2022-10-29 13:31:41 -04:00

308 lines
9.4 KiB
C

/* GTK - The GIMP Toolkit
* Copyright (C) 2012 Red Hat, Inc.
*
* 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/>.
*/
#include "config.h"
#include "gtkcolorscaleprivate.h"
#include "deprecated/gtkcolorchooserprivate.h"
#include "gtkgesturelongpress.h"
#include "gtkgestureclick.h"
#include "gtkcolorutils.h"
#include "gtkorientable.h"
#include "gtkrangeprivate.h"
#include "gtkprivate.h"
#include "gtksnapshot.h"
#include "gtkshortcutcontroller.h"
#include "gtkshortcuttrigger.h"
#include "gtkshortcutaction.h"
#include "gtkshortcut.h"
#include <math.h>
struct _GtkColorScale
{
GtkScale parent_instance;
GdkRGBA color;
GtkColorScaleType type;
GdkTexture *hue_texture;
};
typedef struct
{
GtkScaleClass parent_class;
} GtkColorScaleClass;
enum
{
PROP_ZERO,
PROP_SCALE_TYPE
};
static void hold_action (GtkGestureLongPress *gesture,
double x,
double y,
GtkWidget *scale);
static void click_action (GtkGestureClick *gesture,
guint n_presses,
double x,
double y,
GtkWidget *scale);
G_DEFINE_TYPE (GtkColorScale, gtk_color_scale, GTK_TYPE_SCALE)
void
gtk_color_scale_snapshot_trough (GtkColorScale *scale,
GtkSnapshot *snapshot,
int width,
int height)
{
GtkWidget *widget = GTK_WIDGET (scale);
if (width <= 1 || height <= 1)
return;
if (scale->hue_texture &&
(width != gdk_texture_get_width (scale->hue_texture) ||
height != gdk_texture_get_height (scale->hue_texture)))
g_clear_object (&scale->hue_texture);
if (scale->type == GTK_COLOR_SCALE_HUE)
{
if (!scale->hue_texture)
{
const int stride = width * 3;
GBytes *bytes;
guchar *data, *p;
int hue_x, hue_y;
data = g_malloc (height * stride);
for (hue_y = 0; hue_y < height; hue_y++)
{
const float h = CLAMP ((float)hue_y / (height - 1), 0.0, 1.0);
float r, g, b;
gtk_hsv_to_rgb (h, 1, 1, &r, &g, &b);
p = data + hue_y * stride;
for (hue_x = 0; hue_x < stride; hue_x += 3)
{
p[hue_x + 0] = r * 255;
p[hue_x + 1] = g * 255;
p[hue_x + 2] = b * 255;
}
}
bytes = g_bytes_new_take (data, height * stride);
scale->hue_texture = gdk_memory_texture_new (width, height,
GDK_MEMORY_R8G8B8,
bytes,
stride);
g_bytes_unref (bytes);
}
gtk_snapshot_append_texture (snapshot,
scale->hue_texture,
&GRAPHENE_RECT_INIT(0, 0, width, height));
}
else if (scale->type == GTK_COLOR_SCALE_ALPHA)
{
graphene_point_t start, end;
const GdkRGBA *color;
if (gtk_orientable_get_orientation (GTK_ORIENTABLE (widget)) == GTK_ORIENTATION_HORIZONTAL &&
gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
{
graphene_point_init (&start, width, 0);
graphene_point_init (&end, 0, 0);
}
else
{
graphene_point_init (&start, 0, 0);
graphene_point_init (&end, width, 0);
}
_gtk_color_chooser_snapshot_checkered_pattern (snapshot, width, height);
color = &scale->color;
gtk_snapshot_append_linear_gradient (snapshot,
&GRAPHENE_RECT_INIT(0, 0, width, height),
&start,
&end,
(GskColorStop[2]) {
{ 0, { color->red, color->green, color->blue, 0 } },
{ 1, { color->red, color->green, color->blue, 1 } },
},
2);
}
}
static void
gtk_color_scale_init (GtkColorScale *scale)
{
GtkGesture *gesture;
gesture = gtk_gesture_long_press_new ();
g_signal_connect (gesture, "pressed",
G_CALLBACK (hold_action), scale);
gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (gesture),
GTK_PHASE_TARGET);
gtk_widget_add_controller (GTK_WIDGET (scale), GTK_EVENT_CONTROLLER (gesture));
gesture = gtk_gesture_click_new ();
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture), GDK_BUTTON_SECONDARY);
g_signal_connect (gesture, "pressed",
G_CALLBACK (click_action), scale);
gtk_widget_add_controller (GTK_WIDGET (scale), GTK_EVENT_CONTROLLER (gesture));
gtk_widget_add_css_class (GTK_WIDGET (scale), "color");
}
static void
scale_constructed (GObject *object)
{
GtkColorScale *scale = GTK_COLOR_SCALE (object);
GtkEventController *controller;
GtkShortcutTrigger *trigger;
GtkShortcutAction *action;
GtkShortcut *shortcut;
controller = gtk_shortcut_controller_new ();
trigger = gtk_alternative_trigger_new (gtk_keyval_trigger_new (GDK_KEY_F10, GDK_SHIFT_MASK),
gtk_keyval_trigger_new (GDK_KEY_Menu, 0));
action = gtk_named_action_new ("color.edit");
shortcut = gtk_shortcut_new_with_arguments (trigger,
action,
"s",
scale->type == GTK_COLOR_SCALE_ALPHA
? "a" : "h");
gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller), shortcut);
gtk_widget_add_controller (GTK_WIDGET (scale), controller);
}
static void
scale_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkColorScale *scale = GTK_COLOR_SCALE (object);
switch (prop_id)
{
case PROP_SCALE_TYPE:
g_value_set_int (value, scale->type);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
scale_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkColorScale *scale = GTK_COLOR_SCALE (object);
switch (prop_id)
{
case PROP_SCALE_TYPE:
scale->type = (GtkColorScaleType) g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
hold_action (GtkGestureLongPress *gesture,
double x,
double y,
GtkWidget *scale)
{
gtk_widget_activate_action (scale,
"color.edit",
"s", gtk_widget_get_name (scale));
}
static void
click_action (GtkGestureClick *gesture,
guint n_presses,
double x,
double y,
GtkWidget *scale)
{
gtk_widget_activate_action (scale,
"color.edit",
"s", gtk_widget_get_name (scale));
}
static void
scale_finalize (GObject *object)
{
GtkColorScale *scale = GTK_COLOR_SCALE (object);
g_clear_object (&scale->hue_texture);
G_OBJECT_CLASS (gtk_color_scale_parent_class)->finalize (object);
}
static void
gtk_color_scale_class_init (GtkColorScaleClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->constructed = scale_constructed;
object_class->finalize = scale_finalize;
object_class->get_property = scale_get_property;
object_class->set_property = scale_set_property;
g_object_class_install_property (object_class, PROP_SCALE_TYPE,
g_param_spec_int ("scale-type", NULL, NULL,
0, 1, 0,
GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
}
void
gtk_color_scale_set_rgba (GtkColorScale *scale,
const GdkRGBA *color)
{
scale->color = *color;
gtk_widget_queue_draw (gtk_range_get_trough_widget (GTK_RANGE (scale)));
}
GtkWidget *
gtk_color_scale_new (GtkAdjustment *adjustment,
GtkColorScaleType type)
{
return g_object_new (GTK_TYPE_COLOR_SCALE,
"adjustment", adjustment,
"draw-value", FALSE,
"scale-type", type,
NULL);
}