gtk2/gtk/gtkcoloreditor.c

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/* 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
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkcoloreditorprivate.h"
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#include "gtkcolorchooserprivate.h"
#include "gtkcolorplaneprivate.h"
#include "gtkcolorscaleprivate.h"
#include "gtkcolorswatchprivate.h"
#include "gtkcolorutils.h"
#include "gtkcolorpickerprivate.h"
#include "gtkgrid.h"
#include "gtkbutton.h"
#include "gtkintl.h"
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#include "gtkorientable.h"
#include "gtkentry.h"
#include "gtkoverlay.h"
#include "gtkadjustment.h"
#include "gtklabel.h"
#include "gtkspinbutton.h"
#include "gtkstylecontext.h"
#include "gtkeventcontrollerkey.h"
#include <math.h>
struct _GtkColorEditorPrivate
{
GtkWidget *overlay;
GtkWidget *grid;
GtkWidget *swatch;
GtkWidget *entry;
GtkWidget *h_slider;
GtkWidget *h_popup;
GtkWidget *h_entry;
GtkWidget *a_slider;
GtkWidget *a_popup;
GtkWidget *a_entry;
GtkWidget *sv_plane;
GtkWidget *sv_popup;
GtkWidget *s_entry;
GtkWidget *v_entry;
GtkWidget *current_popup;
GtkWidget *popdown_focus;
GtkAdjustment *h_adj;
GtkAdjustment *s_adj;
GtkAdjustment *v_adj;
GtkAdjustment *a_adj;
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GtkWidget *picker_button;
GtkColorPicker *picker;
gint popup_position;
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guint text_changed : 1;
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guint use_alpha : 1;
};
enum
{
PROP_ZERO,
PROP_RGBA,
PROP_USE_ALPHA
};
static void gtk_color_editor_iface_init (GtkColorChooserInterface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkColorEditor, gtk_color_editor, GTK_TYPE_BOX,
G_ADD_PRIVATE (GtkColorEditor)
G_IMPLEMENT_INTERFACE (GTK_TYPE_COLOR_CHOOSER,
gtk_color_editor_iface_init))
static guint
scale_round (gdouble value, gdouble scale)
{
value = floor (value * scale + 0.5);
value = MAX (value, 0);
value = MIN (value, scale);
return (guint)value;
}
static void
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entry_set_rgba (GtkColorEditor *editor,
const GdkRGBA *color)
{
gchar *text;
text = g_strdup_printf ("#%02X%02X%02X",
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scale_round (color->red, 255),
scale_round (color->green, 255),
scale_round (color->blue, 255));
gtk_entry_set_text (GTK_ENTRY (editor->priv->entry), text);
editor->priv->text_changed = FALSE;
g_free (text);
}
static void
entry_apply (GtkWidget *entry,
GtkColorEditor *editor)
{
GdkRGBA color;
gchar *text;
if (!editor->priv->text_changed)
return;
text = gtk_editable_get_chars (GTK_EDITABLE (editor->priv->entry), 0, -1);
if (gdk_rgba_parse (&color, text))
{
color.alpha = gtk_adjustment_get_value (editor->priv->a_adj);
gtk_color_chooser_set_rgba (GTK_COLOR_CHOOSER (editor), &color);
}
editor->priv->text_changed = FALSE;
g_free (text);
}
static void
entry_focus_changed (GtkWidget *entry,
GParamSpec *pspec,
GtkColorEditor *editor)
{
if (!gtk_widget_has_focus (entry))
entry_apply (entry, editor);
}
static void
entry_text_changed (GtkWidget *entry,
GParamSpec *pspec,
GtkColorEditor *editor)
{
editor->priv->text_changed = TRUE;
}
static void
hsv_changed (GtkColorEditor *editor)
{
GdkRGBA color;
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gdouble h, s, v, a;
h = gtk_adjustment_get_value (editor->priv->h_adj);
s = gtk_adjustment_get_value (editor->priv->s_adj);
v = gtk_adjustment_get_value (editor->priv->v_adj);
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a = gtk_adjustment_get_value (editor->priv->a_adj);
gtk_hsv_to_rgb (h, s, v, &color.red, &color.green, &color.blue);
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color.alpha = a;
gtk_color_swatch_set_rgba (GTK_COLOR_SWATCH (editor->priv->swatch), &color);
gtk_color_scale_set_rgba (GTK_COLOR_SCALE (editor->priv->a_slider), &color);
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entry_set_rgba (editor, &color);
g_object_notify (G_OBJECT (editor), "rgba");
}
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static void
dismiss_current_popup (GtkColorEditor *editor)
{
if (editor->priv->current_popup)
{
gtk_widget_hide (editor->priv->current_popup);
editor->priv->current_popup = NULL;
editor->priv->popup_position = 0;
if (editor->priv->popdown_focus)
{
if (gtk_widget_is_visible (editor->priv->popdown_focus))
gtk_widget_grab_focus (editor->priv->popdown_focus);
g_clear_object (&editor->priv->popdown_focus);
}
}
}
static void
popup_edit (GtkWidget *widget,
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GtkColorEditor *editor)
{
GtkWidget *popup = NULL;
GtkWidget *toplevel;
GtkWidget *focus;
gint position;
gint s, e;
if (widget == editor->priv->sv_plane)
{
popup = editor->priv->sv_popup;
focus = editor->priv->s_entry;
position = 0;
}
else if (widget == editor->priv->h_slider)
{
popup = editor->priv->h_popup;
focus = editor->priv->h_entry;
gtk_range_get_slider_range (GTK_RANGE (editor->priv->h_slider), &s, &e);
position = (s + e) / 2;
}
else if (widget == editor->priv->a_slider)
{
popup = editor->priv->a_popup;
focus = editor->priv->a_entry;
gtk_range_get_slider_range (GTK_RANGE (editor->priv->a_slider), &s, &e);
position = (s + e) / 2;
}
if (popup == editor->priv->current_popup)
dismiss_current_popup (editor);
else if (popup)
{
dismiss_current_popup (editor);
toplevel = gtk_widget_get_toplevel (GTK_WIDGET (editor));
g_set_object (&editor->priv->popdown_focus, gtk_window_get_focus (GTK_WINDOW (toplevel)));
editor->priv->current_popup = popup;
editor->priv->popup_position = position;
gtk_widget_show (popup);
gtk_widget_grab_focus (focus);
}
}
static gboolean
popup_key_pressed (GtkEventController *controller,
guint keyval,
guint keycode,
GdkModifierType state,
GtkColorEditor *editor)
{
if (keyval == GDK_KEY_Escape)
{
dismiss_current_popup (editor);
return TRUE;
}
return FALSE;
}
static gboolean
get_child_position (GtkOverlay *overlay,
GtkWidget *widget,
GtkAllocation *allocation,
GtkColorEditor *editor)
{
GtkRequisition req;
GtkAllocation alloc;
gint s, e;
gtk_widget_get_preferred_size (widget, &req, NULL);
allocation->x = 0;
allocation->y = 0;
allocation->width = req.width;
allocation->height = req.height;
if (widget == editor->priv->sv_popup)
{
gtk_widget_translate_coordinates (editor->priv->sv_plane,
gtk_widget_get_parent (editor->priv->grid),
0, -6,
&allocation->x, &allocation->y);
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if (gtk_widget_get_direction (GTK_WIDGET (overlay)) == GTK_TEXT_DIR_RTL)
allocation->x = 0;
else
allocation->x = gtk_widget_get_width (GTK_WIDGET (overlay)) - req.width;
}
else if (widget == editor->priv->h_popup)
{
gtk_widget_get_allocation (editor->priv->h_slider, &alloc);
gtk_range_get_slider_range (GTK_RANGE (editor->priv->h_slider), &s, &e);
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if (gtk_widget_get_direction (GTK_WIDGET (overlay)) == GTK_TEXT_DIR_RTL)
gtk_widget_translate_coordinates (editor->priv->h_slider,
gtk_widget_get_parent (editor->priv->grid),
- req.width - 6, editor->priv->popup_position - req.height / 2,
&allocation->x, &allocation->y);
else
gtk_widget_translate_coordinates (editor->priv->h_slider,
gtk_widget_get_parent (editor->priv->grid),
alloc.width + 6, editor->priv->popup_position - req.height / 2,
&allocation->x, &allocation->y);
}
else if (widget == editor->priv->a_popup)
{
gtk_widget_get_allocation (editor->priv->a_slider, &alloc);
gtk_range_get_slider_range (GTK_RANGE (editor->priv->a_slider), &s, &e);
gtk_widget_translate_coordinates (editor->priv->a_slider,
gtk_widget_get_parent (editor->priv->grid),
editor->priv->popup_position - req.width / 2, - req.height - 6,
&allocation->x, &allocation->y);
}
else
return FALSE;
allocation->x = CLAMP (allocation->x, 0, gtk_widget_get_width (GTK_WIDGET (overlay)) - req.width);
allocation->y = CLAMP (allocation->y, 0, gtk_widget_get_height (GTK_WIDGET (overlay)) - req.height);
return TRUE;
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}
static void
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value_changed (GtkAdjustment *a,
GtkAdjustment *as)
{
gdouble scale;
scale = gtk_adjustment_get_upper (as) / gtk_adjustment_get_upper (a);
g_signal_handlers_block_by_func (as, value_changed, a);
gtk_adjustment_set_value (as, gtk_adjustment_get_value (a) * scale);
g_signal_handlers_unblock_by_func (as, value_changed, a);
}
static GtkAdjustment *
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scaled_adjustment (GtkAdjustment *a,
gdouble scale)
{
GtkAdjustment *as;
as = gtk_adjustment_new (gtk_adjustment_get_value (a) * scale,
gtk_adjustment_get_lower (a) * scale,
gtk_adjustment_get_upper (a) * scale,
gtk_adjustment_get_step_increment (a) * scale,
gtk_adjustment_get_page_increment (a) * scale,
gtk_adjustment_get_page_size (a) * scale);
g_signal_connect (a, "value-changed", G_CALLBACK (value_changed), as);
g_signal_connect (as, "value-changed", G_CALLBACK (value_changed), a);
return as;
}
static void
color_picked (GObject *source,
GAsyncResult *res,
gpointer data)
{
GtkColorPicker *picker = GTK_COLOR_PICKER (source);
GtkColorEditor *editor = data;
GError *error = NULL;
GdkRGBA *color;
color = gtk_color_picker_pick_finish (picker, res, &error);
if (color == NULL)
{
g_warning ("Picking color failed: %s", error->message);
g_error_free (error);
}
else
{
gtk_color_chooser_set_rgba (GTK_COLOR_CHOOSER (editor), color);
gdk_rgba_free (color);
}
}
static void
pick_color (GtkButton *button,
GtkColorEditor *editor)
{
gtk_color_picker_pick (editor->priv->picker, color_picked, editor);
}
static void
gtk_color_editor_init (GtkColorEditor *editor)
{
GtkEventController *controller;
editor->priv = gtk_color_editor_get_instance_private (editor);
editor->priv->use_alpha = TRUE;
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g_type_ensure (GTK_TYPE_COLOR_SCALE);
g_type_ensure (GTK_TYPE_COLOR_PLANE);
g_type_ensure (GTK_TYPE_COLOR_SWATCH);
gtk_widget_init_template (GTK_WIDGET (editor));
if (gtk_widget_get_direction (editor->priv->h_slider) == GTK_TEXT_DIR_RTL)
gtk_style_context_add_class (gtk_widget_get_style_context (editor->priv->h_slider),
"marks-before");
else
gtk_style_context_add_class (gtk_widget_get_style_context (editor->priv->h_slider),
"marks-after");
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/* Create the scaled popup adjustments manually here because connecting user data is not
* supported by template GtkBuilder xml (it would be possible to set this up in the xml
* but require 4 separate callbacks and would be rather ugly).
*/
gtk_spin_button_set_adjustment (GTK_SPIN_BUTTON (editor->priv->h_entry), scaled_adjustment (editor->priv->h_adj, 100));
gtk_spin_button_set_adjustment (GTK_SPIN_BUTTON (editor->priv->s_entry), scaled_adjustment (editor->priv->s_adj, 100));
gtk_spin_button_set_adjustment (GTK_SPIN_BUTTON (editor->priv->v_entry), scaled_adjustment (editor->priv->v_adj, 100));
gtk_spin_button_set_adjustment (GTK_SPIN_BUTTON (editor->priv->a_entry), scaled_adjustment (editor->priv->a_adj, 100));
/* This can be setup in the .ui file, but requires work in Glade otherwise it cannot be edited there */
gtk_overlay_add_overlay (GTK_OVERLAY (editor->priv->overlay), editor->priv->sv_popup);
gtk_overlay_add_overlay (GTK_OVERLAY (editor->priv->overlay), editor->priv->h_popup);
gtk_overlay_add_overlay (GTK_OVERLAY (editor->priv->overlay), editor->priv->a_popup);
controller = gtk_event_controller_key_new ();
g_signal_connect (controller, "key-pressed", G_CALLBACK (popup_key_pressed), editor);
gtk_widget_add_controller (editor->priv->h_entry, controller);
controller = gtk_event_controller_key_new ();
g_signal_connect (controller, "key-pressed", G_CALLBACK (popup_key_pressed), editor);
gtk_widget_add_controller (editor->priv->s_entry, controller);
controller = gtk_event_controller_key_new ();
g_signal_connect (controller, "key-pressed", G_CALLBACK (popup_key_pressed), editor);
gtk_widget_add_controller (editor->priv->v_entry, controller);
controller = gtk_event_controller_key_new ();
g_signal_connect (controller, "key-pressed", G_CALLBACK (popup_key_pressed), editor);
gtk_widget_add_controller (editor->priv->a_entry, controller);
gtk_style_context_remove_class (gtk_widget_get_style_context (editor->priv->swatch), "activatable");
editor->priv->picker = gtk_color_picker_new ();
if (editor->priv->picker == NULL)
gtk_widget_hide (editor->priv->picker_button);
}
static void
gtk_color_editor_dispose (GObject *object)
{
GtkColorEditor *editor = GTK_COLOR_EDITOR (object);
dismiss_current_popup (editor);
g_clear_object (&editor->priv->picker);
G_OBJECT_CLASS (gtk_color_editor_parent_class)->dispose (object);
}
static void
gtk_color_editor_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
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GtkColorEditor *ce = GTK_COLOR_EDITOR (object);
GtkColorChooser *cc = GTK_COLOR_CHOOSER (object);
switch (prop_id)
{
case PROP_RGBA:
{
GdkRGBA color;
gtk_color_chooser_get_rgba (cc, &color);
g_value_set_boxed (value, &color);
}
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break;
case PROP_USE_ALPHA:
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g_value_set_boolean (value, gtk_widget_get_visible (ce->priv->a_slider));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
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static void
gtk_color_editor_set_use_alpha (GtkColorEditor *editor,
gboolean use_alpha)
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{
if (editor->priv->use_alpha != use_alpha)
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{
editor->priv->use_alpha = use_alpha;
gtk_widget_set_visible (editor->priv->a_slider, use_alpha);
gtk_color_swatch_set_use_alpha (GTK_COLOR_SWATCH (editor->priv->swatch), use_alpha);
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}
}
static void
gtk_color_editor_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
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GtkColorEditor *ce = GTK_COLOR_EDITOR (object);
GtkColorChooser *cc = GTK_COLOR_CHOOSER (object);
switch (prop_id)
{
case PROP_RGBA:
gtk_color_chooser_set_rgba (cc, g_value_get_boxed (value));
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break;
case PROP_USE_ALPHA:
gtk_color_editor_set_use_alpha (ce, g_value_get_boolean (value));
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break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_color_editor_class_init (GtkColorEditorClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
object_class->dispose = gtk_color_editor_dispose;
object_class->get_property = gtk_color_editor_get_property;
object_class->set_property = gtk_color_editor_set_property;
g_object_class_override_property (object_class, PROP_RGBA, "rgba");
g_object_class_override_property (object_class, PROP_USE_ALPHA, "use-alpha");
/* Bind class to template
*/
gtk_widget_class_set_template_from_resource (widget_class,
"/org/gtk/libgtk/ui/gtkcoloreditor.ui");
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, overlay);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, grid);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, swatch);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, entry);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, h_slider);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, h_popup);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, h_entry);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, a_slider);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, a_popup);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, a_entry);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, sv_plane);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, sv_popup);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, s_entry);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, v_entry);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, h_adj);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, s_adj);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, v_adj);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, a_adj);
gtk_widget_class_bind_template_child_private (widget_class, GtkColorEditor, picker_button);
gtk_widget_class_bind_template_callback (widget_class, hsv_changed);
gtk_widget_class_bind_template_callback (widget_class, dismiss_current_popup);
gtk_widget_class_bind_template_callback (widget_class, get_child_position);
gtk_widget_class_bind_template_callback (widget_class, entry_text_changed);
gtk_widget_class_bind_template_callback (widget_class, entry_apply);
gtk_widget_class_bind_template_callback (widget_class, entry_focus_changed);
gtk_widget_class_bind_template_callback (widget_class, popup_edit);
gtk_widget_class_bind_template_callback (widget_class, pick_color);
}
static void
gtk_color_editor_get_rgba (GtkColorChooser *chooser,
GdkRGBA *color)
{
GtkColorEditor *editor = GTK_COLOR_EDITOR (chooser);
gdouble h, s, v;
h = gtk_adjustment_get_value (editor->priv->h_adj);
s = gtk_adjustment_get_value (editor->priv->s_adj);
v = gtk_adjustment_get_value (editor->priv->v_adj);
gtk_hsv_to_rgb (h, s, v, &color->red, &color->green, &color->blue);
color->alpha = gtk_adjustment_get_value (editor->priv->a_adj);
}
static void
gtk_color_editor_set_rgba (GtkColorChooser *chooser,
const GdkRGBA *color)
{
GtkColorEditor *editor = GTK_COLOR_EDITOR (chooser);
gdouble h, s, v;
gtk_rgb_to_hsv (color->red, color->green, color->blue, &h, &s, &v);
gtk_adjustment_set_value (editor->priv->h_adj, h);
gtk_adjustment_set_value (editor->priv->s_adj, s);
gtk_adjustment_set_value (editor->priv->v_adj, v);
gtk_adjustment_set_value (editor->priv->a_adj, color->alpha);
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gtk_color_swatch_set_rgba (GTK_COLOR_SWATCH (editor->priv->swatch), color);
gtk_color_scale_set_rgba (GTK_COLOR_SCALE (editor->priv->a_slider), color);
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entry_set_rgba (editor, color);
g_object_notify (G_OBJECT (editor), "rgba");
}
static void
gtk_color_editor_iface_init (GtkColorChooserInterface *iface)
{
iface->get_rgba = gtk_color_editor_get_rgba;
iface->set_rgba = gtk_color_editor_set_rgba;
}
GtkWidget *
gtk_color_editor_new (void)
{
return (GtkWidget *) g_object_new (GTK_TYPE_COLOR_EDITOR, NULL);
}