/* uber-label.c
*
* Copyright (C) 2010 Christian Hergert <chris@dronelabs.com>
*
* 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 <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib/gi18n.h>
#include "uber-label.h"
/**
* SECTION:uber-label.h
* @title: UberLabel
* @short_description:
*
* Section overview.
*/
struct _UberLabelPrivate
{
GtkWidget *hbox;
GtkWidget *block;
GtkWidget *label;
GdkRGBA color;
gboolean in_block;
};
G_DEFINE_TYPE_WITH_PRIVATE(UberLabel, uber_label, GTK_TYPE_WIDGET)
enum
{
COLOR_CHANGED,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_COLOR,
PROP_TEXT,
};
static guint signals[LAST_SIGNAL] = { 0 };
/**
* uber_label_new:
*
* Creates a new instance of #UberLabel.
*
* Returns: the newly created instance of #UberLabel.
* Side effects: None.
*/
GtkWidget*
uber_label_new (void)
{
UberLabel *label;
label = g_object_new(UBER_TYPE_LABEL, NULL);
return GTK_WIDGET(label);
}
/**
* uber_label_set_text:
* @label: A #UberLabel.
* @text: The label text.
*
* Sets the text for the label.
*
* Returns: None.
* Side effects: None.
*/
void
uber_label_set_text (UberLabel *label, /* IN */
const gchar *text) /* IN */
{
UberLabelPrivate *priv;
g_return_if_fail(UBER_IS_LABEL(label));
priv = label->priv;
gtk_label_set_text(GTK_LABEL(priv->label), text);
}
/**
* uber_label_set_color:
* @label: A #UberLabel.
* @color: A #GdkRGBA.
*
* Sets the color of the label.
*
* Returns: None.
* Side effects: None.
*/
void
uber_label_set_color (UberLabel *label, /* IN */
const GdkRGBA *color) /* IN */
{
UberLabelPrivate *priv;
g_return_if_fail(UBER_IS_LABEL(label));
priv = label->priv;
priv->color = *color;
}
static void
uber_label_block_draw (GtkWidget *block, /* IN */
cairo_t *cr, /* IN */
UberLabel *label) /* IN */
{
UberLabelPrivate *priv;
GtkAllocation alloc;
g_return_if_fail(UBER_IS_LABEL(label));
priv = label->priv;
gtk_widget_get_allocation(block, &alloc);
/*
* Draw background.
*/
gdk_cairo_set_source_rgba(cr, &priv->color);
cairo_rectangle(cr, .5, .5, alloc.width - 1., alloc.height - 1.);
cairo_fill_preserve(cr);
/*
* Add highlight if mouse is in the block.
*/
if (priv->in_block) {
cairo_set_source_rgba(cr, 1., 1., 1., .3);
cairo_fill_preserve(cr);
}
/*
* Stroke the edge of the block.
*/
cairo_set_line_width(cr, 1.0);
cairo_set_source_rgba(cr, 0., 0., 0., .5);
cairo_stroke(cr);
/*
* Stroke the highlight of the block.
*/
cairo_rectangle(cr, 1.5, 1.5, alloc.width - 3., alloc.height - 3.);
cairo_set_source_rgba(cr, 1., 1., 1., .5);
cairo_stroke(cr);
}
/**
* uber_label_block_enter_notify_event:
* @label: A #UberLabel.
*
* Tracks the mouse entering the block widget.
*
* Returns: %FALSE to allow further callbacks.
* Side effects: None.
*/
static gboolean
uber_label_block_enter_notify_event (GtkWidget *widget, /* IN */
GdkEventCrossing *event, /* IN */
UberLabel *label) /* IN */
{
UberLabelPrivate *priv;
priv = label->priv;
priv->in_block = TRUE;
gtk_widget_queue_draw(widget);
return FALSE;
}
/**
* uber_label_block_leave_notify_event:
* @label: A #UberLabel.
*
* Tracks the mouse leaving the block widget.
*
* Returns: %FALSE to allow further callbacks.
* Side effects: None.
*/
static gboolean
uber_label_block_leave_notify_event (GtkWidget *widget, /* IN */
GdkEventCrossing *event, /* IN */
UberLabel *label) /* IN */
{
UberLabelPrivate *priv;
priv = label->priv;
priv->in_block = FALSE;
gtk_widget_queue_draw(widget);
return FALSE;
}
/**
* uber_label_block_button_press_event:
* @widget: A #GtkWidget.
* @event: A #GdkEventButton.
* @label: An #UberLabel.
*
* Callback to handle a button press event within the colored block.
*
* Returns: %FALSE always to allow further signal emission.
* Side effects: None.
*/
static gboolean
uber_label_block_button_press_event (GtkWidget *widget, /* IN */
GdkEventButton *event, /* IN */
UberLabel *label) /* IN */
{
UberLabelPrivate *priv;
GtkWidget *dialog;
g_return_val_if_fail(UBER_IS_LABEL(label), FALSE);
priv = label->priv;
dialog = gtk_color_chooser_dialog_new("", GTK_WINDOW(gtk_widget_get_toplevel(widget)));
gtk_color_chooser_set_use_alpha(GTK_COLOR_CHOOSER(dialog), TRUE);
gtk_color_chooser_set_rgba(
GTK_COLOR_CHOOSER(dialog),
&priv->color);
if (gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_OK) {
gtk_color_chooser_get_rgba(
GTK_COLOR_CHOOSER(dialog),
&priv->color);
gtk_widget_queue_draw(widget);
g_signal_emit(label, signals[COLOR_CHANGED],
0, &priv->color);
}
gtk_widget_destroy(dialog);
return FALSE;
}
/**
* uber_label_set_property:
* @object: (in): A #GObject.
* @prop_id: (in): The property identifier.
* @value: (in): The given property.
* @pspec: (in): A #ParamSpec.
*
* Set a given #GObject property.
*/
static void
uber_label_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
UberLabel *label = UBER_LABEL(object);
switch (prop_id) {
case PROP_COLOR:
uber_label_set_color(label, g_value_get_boxed(value));
break;
case PROP_TEXT:
uber_label_set_text(label, g_value_get_string(value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
}
}
/**
* uber_label_finalize:
* @object: A #UberLabel.
*
* Finalizer for a #UberLabel instance. Frees any resources held by
* the instance.
*
* Returns: None.
* Side effects: None.
*/
static void
uber_label_finalize (GObject *object) /* IN */
{
G_OBJECT_CLASS(uber_label_parent_class)->finalize(object);
}
/**
* uber_label_class_init:
* @klass: A #UberLabelClass.
*
* Initializes the #UberLabelClass and prepares the vtable.
*
* Returns: None.
* Side effects: None.
*/
static void
uber_label_class_init (UberLabelClass *klass) /* IN */
{
GObjectClass *object_class;
object_class = G_OBJECT_CLASS(klass);
object_class->finalize = uber_label_finalize;
object_class->set_property = uber_label_set_property;
g_object_class_install_property(object_class,
PROP_COLOR,
g_param_spec_boxed("color",
"color",
"color",
GDK_TYPE_RGBA,
G_PARAM_WRITABLE));
g_object_class_install_property(object_class,
PROP_TEXT,
g_param_spec_string("text",
"text",
"text",
NULL,
G_PARAM_WRITABLE));
/**
* UberLabel::color-changed:
* @label: An #UberLabel.
* @color: A #GdkRGBA.
*
* Signal emitted when the color is changed.
*/
signals[COLOR_CHANGED] = g_signal_new("color-changed",
UBER_TYPE_LABEL,
G_SIGNAL_RUN_FIRST,
0,
NULL,
NULL,
g_cclosure_marshal_VOID__POINTER,
G_TYPE_NONE,
1,
G_TYPE_POINTER);
}
/**
* uber_label_init:
* @label: A #UberLabel.
*
* Initializes the newly created #UberLabel instance.
*
* Returns: None.
* Side effects: None.
*/
static void
uber_label_init (UberLabel *label) /* IN */
{
UberLabelPrivate *priv;
label->priv = uber_label_get_instance_private(label);
priv = label->priv;
priv->hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 6);
priv->block = gtk_drawing_area_new();
priv->label = gtk_label_new(NULL);
gdk_rgba_parse(&priv->color, "#cc0000");
gtk_widget_set_halign(GTK_WIDGET(priv->label), GTK_ALIGN_START);
gtk_widget_set_valign(GTK_WIDGET(priv->label), GTK_ALIGN_CENTER);
gtk_widget_set_size_request(priv->block, 32, 17);
gtk_container_add(GTK_CONTAINER(label), priv->hbox);
gtk_box_pack_start(GTK_BOX(priv->hbox), priv->block, FALSE, TRUE, 0);
gtk_box_pack_start(GTK_BOX(priv->hbox), priv->label, TRUE, TRUE, 0);
gtk_widget_add_events(priv->block,
GDK_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK |
GDK_BUTTON_PRESS_MASK);
g_signal_connect(priv->block,
"draw",
G_CALLBACK(uber_label_block_draw),
label);
g_signal_connect(priv->block,
"enter-notify-event",
G_CALLBACK(uber_label_block_enter_notify_event),
label);
g_signal_connect(priv->block,
"leave-notify-event",
G_CALLBACK(uber_label_block_leave_notify_event),
label);
g_signal_connect(priv->block,
"button-press-event",
G_CALLBACK(uber_label_block_button_press_event),
label);
gtk_widget_set_tooltip_text(GTK_WIDGET(priv->block),
_("Click to select color"));
gtk_widget_show(priv->hbox);
gtk_widget_show(priv->block);
gtk_widget_show(priv->label);
}