293 lines
9.4 KiB
C
293 lines
9.4 KiB
C
/*
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* Copyright (C) 2010 Daiki Ueno <ueno@unixuser.org>
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* Copyright (C) 2010 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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/**
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* SECTION:eek-gtk-keyboard
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* @short_description: #EekKeyboard embedding a #GtkActor
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*/
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#include <string.h>
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif /* HAVE_CONFIG_H */
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#include "eek-gtk-keyboard.h"
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#include "eek-drawing.h"
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#include "eek-keyboard.h"
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#include "eek-section.h"
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#include "eek-key.h"
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#include "eek-keysym.h"
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G_DEFINE_TYPE (EekGtkKeyboard, eek_gtk_keyboard, EEK_TYPE_KEYBOARD);
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#define EEK_GTK_KEYBOARD_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), EEK_TYPE_GTK_KEYBOARD, EekGtkKeyboardPrivate))
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struct _EekGtkKeyboardPrivate
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{
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GtkWidget *widget; /* GtkDrawingArea */
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GdkPixmap *pixmap;
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GdkColor *dark_color;
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cairo_t *cr;
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PangoLayout *layout;
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PangoFontDescription *fonts[EEK_KEYSYM_CATEGORY_LAST];
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};
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static void
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eek_gtk_keyboard_dispose (GObject *object)
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{
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EekGtkKeyboardPrivate *priv = EEK_GTK_KEYBOARD_GET_PRIVATE(object);
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if (priv->widget) {
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g_object_unref (priv->widget);
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priv->widget = NULL;
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}
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G_OBJECT_CLASS (eek_gtk_keyboard_parent_class)->dispose (object);
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}
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static void
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eek_gtk_keyboard_finalize (GObject *object)
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{
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EekGtkKeyboardPrivate *priv = EEK_GTK_KEYBOARD_GET_PRIVATE(object);
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gint i;
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for (i = 0; i < EEK_KEYSYM_CATEGORY_LAST; i++)
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pango_font_description_free (priv->fonts[i]);
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}
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static void
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eek_gtk_keyboard_class_init (EekGtkKeyboardClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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g_type_class_add_private (gobject_class,
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sizeof (EekGtkKeyboardPrivate));
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gobject_class->dispose = eek_gtk_keyboard_dispose;
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gobject_class->finalize = eek_gtk_keyboard_finalize;
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}
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static void
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eek_gtk_keyboard_init (EekGtkKeyboard *self)
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{
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EekGtkKeyboardPrivate *priv;
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priv = self->priv = EEK_GTK_KEYBOARD_GET_PRIVATE(self);
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priv->widget = NULL;
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priv->pixmap = NULL;
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memset (priv->fonts, 0, sizeof priv->fonts);
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}
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/**
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* eek_gtk_keyboard_new:
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*
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* Create a new #EekGtkKeyboard.
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*/
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EekKeyboard*
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eek_gtk_keyboard_new (void)
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{
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return g_object_new (EEK_TYPE_GTK_KEYBOARD, NULL);
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}
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static void
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draw_key (EekElement *element, gpointer user_data)
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{
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EekKeyboard *keyboard = user_data;
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EekGtkKeyboardPrivate *priv = EEK_GTK_KEYBOARD_GET_PRIVATE(keyboard);
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EekKey *key = EEK_KEY(element);
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EekOutline *outline;
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EekBounds bounds;
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guint keysym;
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cairo_save (priv->cr);
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eek_element_get_bounds (EEK_ELEMENT(key), &bounds);
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cairo_translate (priv->cr, bounds.x, bounds.y);
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outline = eek_key_get_outline (key);
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eek_draw_outline (priv->cr, outline);
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gdk_cairo_set_source_color (priv->cr, priv->dark_color);
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keysym = eek_key_get_keysym (key);
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if (keysym != EEK_INVALID_KEYSYM) {
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const gchar *label = eek_keysym_to_string (keysym);
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PangoRectangle logical_rect = { 0, };
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EekKeysymCategory category = eek_keysym_get_category (keysym);
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if (category != EEK_KEYSYM_CATEGORY_UNKNOWN && label) {
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pango_layout_set_font_description (priv->layout,
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priv->fonts[category]);
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pango_layout_set_text (priv->layout, label, -1);
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pango_layout_get_extents (priv->layout, NULL, &logical_rect);
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cairo_move_to
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(priv->cr,
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(bounds.width - logical_rect.width / PANGO_SCALE) / 2,
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(bounds.height - logical_rect.height / PANGO_SCALE) / 2);
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pango_layout_set_width (priv->layout, PANGO_SCALE * bounds.width);
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pango_layout_set_ellipsize (priv->layout, PANGO_ELLIPSIZE_END);
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pango_cairo_show_layout (priv->cr, priv->layout);
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}
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}
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cairo_restore (priv->cr);
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}
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static void
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draw_section (EekElement *element, gpointer user_data)
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{
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EekKeyboard *keyboard = user_data;
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EekGtkKeyboardPrivate *priv = EEK_GTK_KEYBOARD_GET_PRIVATE(keyboard);
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EekBounds bounds;
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gdk_cairo_set_source_color (priv->cr, priv->dark_color);
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eek_element_get_bounds (element, &bounds);
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cairo_save (priv->cr);
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cairo_translate (priv->cr, bounds.x, bounds.y);
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#if 0
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cairo_rectangle (priv->cr, 0, 0, bounds.width, bounds.height);
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cairo_stroke (priv->cr);
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#endif
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eek_container_foreach_child (EEK_CONTAINER(element), draw_key,
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keyboard);
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cairo_restore (priv->cr);
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}
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static gboolean
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on_gtk_expose_event (GtkWidget *widget,
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GdkEventExpose *event,
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gpointer user_data)
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{
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EekGtkKeyboard *keyboard = user_data;
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EekGtkKeyboardPrivate *priv =
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EEK_GTK_KEYBOARD_GET_PRIVATE(keyboard);
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GtkStateType state = gtk_widget_get_state (GTK_WIDGET (widget));
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if (!priv->pixmap) {
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GtkStateType state = gtk_widget_get_state (GTK_WIDGET (priv->widget));
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GtkAllocation allocation;
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PangoContext *context;
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PangoFontDescription *default_font_desc;
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context = gtk_widget_get_pango_context (GTK_WIDGET (priv->widget));
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priv->layout = pango_layout_new (context);
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/* compute font sizes */
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default_font_desc =
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gtk_widget_get_style (GTK_WIDGET(priv->widget))->font_desc;
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pango_layout_set_font_description (priv->layout, default_font_desc);
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eek_get_fonts (EEK_KEYBOARD(keyboard), priv->layout, priv->fonts);
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/* create priv->pixmap */
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gtk_widget_set_double_buffered (GTK_WIDGET (priv->widget), FALSE);
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gtk_widget_get_allocation (GTK_WIDGET (priv->widget), &allocation);
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priv->pixmap =
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gdk_pixmap_new (gtk_widget_get_window (GTK_WIDGET (priv->widget)),
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allocation.width, allocation.height, -1);
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/* blank background */
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gdk_draw_rectangle
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(priv->pixmap,
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gtk_widget_get_style (GTK_WIDGET(priv->widget))->base_gc[state],
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TRUE,
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0, 0, allocation.width, allocation.height);
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/* draw sections on the canvas */
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priv->cr = gdk_cairo_create (GDK_DRAWABLE (priv->pixmap));
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priv->dark_color =
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>k_widget_get_style (GTK_WIDGET (priv->widget))->dark[state];
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eek_container_foreach_child (EEK_CONTAINER(keyboard), draw_section,
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keyboard);
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cairo_destroy (priv->cr);
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priv->cr = NULL;
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priv->dark_color = NULL;
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}
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gdk_draw_drawable (gtk_widget_get_window (widget),
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gtk_widget_get_style (widget)->fg_gc[state],
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priv->pixmap,
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event->area.x, event->area.y,
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event->area.x, event->area.y,
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event->area.width, event->area.height);
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return TRUE;
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}
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static gboolean
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on_gtk_button_event (GtkWidget *widget,
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GdkEventButton *event,
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gpointer user_data)
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{
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EekElement *keyboard = user_data, *section, *key;
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EekBounds bounds;
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gdouble x, y;
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x = (gdouble)event->x;
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y = (gdouble)event->y;
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section = eek_container_find_by_position (EEK_CONTAINER(keyboard), x, y);
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if (section) {
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eek_element_get_bounds (keyboard, &bounds);
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x -= bounds.x;
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y -= bounds.y;
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key = eek_container_find_by_position (EEK_CONTAINER(section), x, y);
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if (key)
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switch (event->type) {
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case GDK_BUTTON_PRESS:
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g_signal_emit_by_name (keyboard, "key-pressed", key);
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return TRUE;
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case GDK_BUTTON_RELEASE:
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g_signal_emit_by_name (keyboard, "key-released", key);
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return TRUE;
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default:
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return FALSE;
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}
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}
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return FALSE;
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}
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GtkWidget *
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eek_gtk_keyboard_get_widget (EekGtkKeyboard *keyboard)
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{
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EekGtkKeyboardPrivate *priv =
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EEK_GTK_KEYBOARD_GET_PRIVATE(keyboard);
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if (!priv->widget) {
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priv->widget = gtk_drawing_area_new ();
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g_object_ref_sink (priv->widget);
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gtk_widget_set_events (priv->widget,
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GDK_EXPOSURE_MASK |
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GDK_KEY_PRESS_MASK |
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GDK_BUTTON_PRESS_MASK |
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GDK_BUTTON_RELEASE_MASK);
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g_signal_connect (priv->widget, "expose_event",
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G_CALLBACK (on_gtk_expose_event), keyboard);
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g_signal_connect (priv->widget, "button-press-event",
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G_CALLBACK (on_gtk_button_event), keyboard);
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g_signal_connect (priv->widget, "button-release-event",
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G_CALLBACK (on_gtk_button_event), keyboard);
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eek_keyboard_realize (EEK_KEYBOARD(keyboard));
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}
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return priv->widget;
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}
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