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-rw-r--r--libgimpwidgets/gimpbutton.c165
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diff --git a/libgimpwidgets/gimpbutton.c b/libgimpwidgets/gimpbutton.c
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+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimpbutton.c
+ * Copyright (C) 2000-2008 Michael Natterer <mitch@gimp.org>
+ *
+ * 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 3 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
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gtk/gtk.h>
+
+#include "gimpwidgetstypes.h"
+
+#include "gimpbutton.h"
+#include "gimp3migration.h"
+
+
+/**
+ * SECTION: gimpbutton
+ * @title: GimpButton
+ * @short_description: A #GtkButton with a little extra functionality.
+ *
+ * #GimpButton adds an extra signal to the #GtkButton widget that
+ * allows the callback to distinguish a normal click from a click that
+ * was performed with modifier keys pressed.
+ **/
+
+
+enum
+{
+ EXTENDED_CLICKED,
+ LAST_SIGNAL
+};
+
+
+static gboolean gimp_button_button_press (GtkWidget *widget,
+ GdkEventButton *event);
+static void gimp_button_clicked (GtkButton *button);
+
+
+G_DEFINE_TYPE (GimpButton, gimp_button, GTK_TYPE_BUTTON)
+
+#define parent_class gimp_button_parent_class
+
+static guint button_signals[LAST_SIGNAL] = { 0 };
+
+
+static void
+gimp_button_class_init (GimpButtonClass *klass)
+{
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+ GtkButtonClass *button_class = GTK_BUTTON_CLASS (klass);
+
+ /**
+ * GimpButton::extended-clicked:
+ * @gimpbutton: the object that received the signal.
+ * @arg1: the state of modifier keys when the button was clicked
+ *
+ * This signal is emitted when the button is clicked with a modifier
+ * key pressed.
+ **/
+ button_signals[EXTENDED_CLICKED] =
+ g_signal_new ("extended-clicked",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_FIRST,
+ G_STRUCT_OFFSET (GimpButtonClass, extended_clicked),
+ NULL, NULL,
+ g_cclosure_marshal_VOID__FLAGS,
+ G_TYPE_NONE, 1,
+ GDK_TYPE_MODIFIER_TYPE);
+
+ widget_class->button_press_event = gimp_button_button_press;
+
+ button_class->clicked = gimp_button_clicked;
+}
+
+static void
+gimp_button_init (GimpButton *button)
+{
+ button->press_state = 0;
+}
+
+/**
+ * gimp_button_new:
+ *
+ * Creates a new #GimpButton widget.
+ *
+ * Returns: A pointer to the new #GimpButton widget.
+ **/
+GtkWidget *
+gimp_button_new (void)
+{
+ return g_object_new (GIMP_TYPE_BUTTON, NULL);
+}
+
+/**
+ * gimp_button_extended_clicked:
+ * @button: a #GimpButton.
+ * @state: a state as found in #GdkEventButton->state, e.g. #GDK_SHIFT_MASK.
+ *
+ * Emits the button's "extended_clicked" signal.
+ **/
+void
+gimp_button_extended_clicked (GimpButton *button,
+ GdkModifierType state)
+{
+ g_return_if_fail (GIMP_IS_BUTTON (button));
+
+ g_signal_emit (button, button_signals[EXTENDED_CLICKED], 0, state);
+}
+
+static gboolean
+gimp_button_button_press (GtkWidget *widget,
+ GdkEventButton *bevent)
+{
+ GimpButton *button = GIMP_BUTTON (widget);
+
+ if (bevent->button == 1)
+ {
+ button->press_state = bevent->state;
+ }
+ else
+ {
+ button->press_state = 0;
+ }
+
+ return GTK_WIDGET_CLASS (parent_class)->button_press_event (widget, bevent);
+}
+
+static void
+gimp_button_clicked (GtkButton *button)
+{
+ if (GIMP_BUTTON (button)->press_state &
+ (GDK_SHIFT_MASK | GDK_CONTROL_MASK | GDK_MOD1_MASK |
+ gtk_widget_get_modifier_mask (GTK_WIDGET (button),
+ GDK_MODIFIER_INTENT_PRIMARY_ACCELERATOR) |
+ gtk_widget_get_modifier_mask (GTK_WIDGET (button),
+ GDK_MODIFIER_INTENT_EXTEND_SELECTION) |
+ gtk_widget_get_modifier_mask (GTK_WIDGET (button),
+ GDK_MODIFIER_INTENT_MODIFY_SELECTION)))
+ {
+ g_signal_stop_emission_by_name (button, "clicked");
+
+ gimp_button_extended_clicked (GIMP_BUTTON (button),
+ GIMP_BUTTON (button)->press_state);
+ }
+ else if (GTK_BUTTON_CLASS (parent_class)->clicked)
+ {
+ GTK_BUTTON_CLASS (parent_class)->clicked (button);
+ }
+}