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-rw-r--r--app/widgets/gimphighlightablebutton.c369
1 files changed, 369 insertions, 0 deletions
diff --git a/app/widgets/gimphighlightablebutton.c b/app/widgets/gimphighlightablebutton.c
new file mode 100644
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--- /dev/null
+++ b/app/widgets/gimphighlightablebutton.c
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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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