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libeek: refine GtkDrawingArea based UI

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This commit is contained in:
Daiki Ueno
2010-06-18 13:27:50 +09:00
parent 6ba0a734d9
commit 3af13fb38a
7 changed files with 347 additions and 109 deletions
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353
eek/eek-gtk-keyboard.c
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@ -40,17 +40,55 @@ G_DEFINE_TYPE (EekGtkKeyboard, eek_gtk_keyboard, EEK_TYPE_KEYBOARD);
#define EEK_GTK_KEYBOARD_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), EEK_TYPE_GTK_KEYBOARD, EekGtkKeyboardPrivate))
#define SCALE 1.5
struct _EekGtkKeyboardPrivate
{
GtkWidget *widget; /* GtkDrawingArea */
GtkWidget *widget;
/* pixmap of entire keyboard (for expose event) */
GdkPixmap *pixmap;
GdkColor *dark_color;
cairo_t *cr;
PangoLayout *layout;
/* mapping from outline pointer to pixmap */
GHashTable *outline_pixmaps;
/* mapping from outline pointer to large pixmap */
GHashTable *outline_large_pixmaps;
PangoFontDescription *fonts[EEK_KEYSYM_CATEGORY_LAST];
};
static void prepare_keyboard_pixmap (EekGtkKeyboard *keyboard);
static void
eek_gtk_keyboard_real_set_keysym_index (EekKeyboard *self,
gint group,
gint level)
{
gint g, l;
eek_keyboard_get_keysym_index (self, &g, &l);
EEK_KEYBOARD_CLASS(eek_gtk_keyboard_parent_class)->
set_keysym_index (self, group, level);
if (g != group || l != level) {
EekGtkKeyboard *keyboard = EEK_GTK_KEYBOARD(self);
EekGtkKeyboardPrivate *priv =
EEK_GTK_KEYBOARD_GET_PRIVATE(keyboard);
GtkStateType state;
GtkAllocation allocation;
prepare_keyboard_pixmap (keyboard);
state = gtk_widget_get_state (GTK_WIDGET (priv->widget));
gtk_widget_get_allocation (GTK_WIDGET (priv->widget), &allocation);
gdk_draw_drawable (gtk_widget_get_window (priv->widget),
gtk_widget_get_style (priv->widget)->fg_gc[state],
priv->pixmap,
0, 0,
0, 0,
allocation.width, allocation.height);
}
}
static void
eek_gtk_keyboard_dispose (GObject *object)
{
@ -69,6 +107,9 @@ eek_gtk_keyboard_finalize (GObject *object)
EekGtkKeyboardPrivate *priv = EEK_GTK_KEYBOARD_GET_PRIVATE(object);
gint i;
g_hash_table_unref (priv->outline_pixmaps);
g_hash_table_unref (priv->outline_large_pixmaps);
for (i = 0; i < EEK_KEYSYM_CATEGORY_LAST; i++)
pango_font_description_free (priv->fonts[i]);
}
@ -76,11 +117,13 @@ eek_gtk_keyboard_finalize (GObject *object)
static void
eek_gtk_keyboard_class_init (EekGtkKeyboardClass *klass)
{
EekKeyboardClass *keyboard_class = EEK_KEYBOARD_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
g_type_class_add_private (gobject_class,
sizeof (EekGtkKeyboardPrivate));
keyboard_class->set_keysym_index = eek_gtk_keyboard_real_set_keysym_index;
gobject_class->dispose = eek_gtk_keyboard_dispose;
gobject_class->finalize = eek_gtk_keyboard_finalize;
}
@ -93,6 +136,16 @@ eek_gtk_keyboard_init (EekGtkKeyboard *self)
priv = self->priv = EEK_GTK_KEYBOARD_GET_PRIVATE(self);
priv->widget = NULL;
priv->pixmap = NULL;
priv->outline_pixmaps =
g_hash_table_new_full (g_direct_hash,
g_direct_equal,
NULL,
g_object_unref);
priv->outline_large_pixmaps =
g_hash_table_new_full (g_direct_hash,
g_direct_equal,
NULL,
g_object_unref);
memset (priv->fonts, 0, sizeof priv->fonts);
}
@ -107,123 +160,143 @@ eek_gtk_keyboard_new (void)
return g_object_new (EEK_TYPE_GTK_KEYBOARD, NULL);
}
static void
draw_key (EekElement *element, gpointer user_data)
struct _DrawingContext
{
EekKeyboard *keyboard = user_data;
EekGtkKeyboardPrivate *priv = EEK_GTK_KEYBOARD_GET_PRIVATE(keyboard);
EekGtkKeyboard *keyboard;
cairo_t *cr;
GdkColor *fg, *bg;
};
typedef struct _DrawingContext DrawingContext;
static void
prepare_keyboard_pixmap_key_callback (EekElement *element,
gpointer user_data)
{
DrawingContext *context = user_data;
EekGtkKeyboardPrivate *priv =
EEK_GTK_KEYBOARD_GET_PRIVATE(context->keyboard);
EekKey *key = EEK_KEY(element);
EekOutline *outline;
EekBounds bounds;
guint keysym;
EekOutline *outline;
GdkPixmap *pixmap;
eek_element_get_bounds (element, &bounds);
cairo_save (priv->cr);
eek_element_get_bounds (EEK_ELEMENT(key), &bounds);
cairo_translate (priv->cr, bounds.x, bounds.y);
outline = eek_key_get_outline (key);
eek_draw_outline (priv->cr, outline);
pixmap = g_hash_table_lookup (priv->outline_pixmaps, outline);
if (!pixmap) {
cairo_t *cr;
gdk_cairo_set_source_color (priv->cr, priv->dark_color);
keysym = eek_key_get_keysym (key);
if (keysym != EEK_INVALID_KEYSYM) {
const gchar *label = eek_keysym_to_string (keysym);
PangoRectangle logical_rect = { 0, };
EekKeysymCategory category = eek_keysym_get_category (keysym);
if (category != EEK_KEYSYM_CATEGORY_UNKNOWN && label) {
pango_layout_set_font_description (priv->layout,
priv->fonts[category]);
pango_layout_set_text (priv->layout, label, -1);
pango_layout_get_extents (priv->layout, NULL, &logical_rect);
cairo_move_to
(priv->cr,
(bounds.width - logical_rect.width / PANGO_SCALE) / 2,
(bounds.height - logical_rect.height / PANGO_SCALE) / 2);
pango_layout_set_width (priv->layout, PANGO_SCALE * bounds.width);
pango_layout_set_ellipsize (priv->layout, PANGO_ELLIPSIZE_END);
pango_cairo_show_layout (priv->cr, priv->layout);
}
pixmap =
gdk_pixmap_new (gtk_widget_get_window (GTK_WIDGET (priv->widget)),
bounds.width, bounds.height, -1);
cr = gdk_cairo_create (GDK_DRAWABLE (pixmap));
gdk_cairo_set_source_color (cr, context->bg);
cairo_rectangle (cr, 0, 0, bounds.width, bounds.height);
gdk_cairo_set_source_color (cr, context->fg);
eek_draw_outline (cr, outline);
cairo_destroy (cr);
g_hash_table_insert (priv->outline_pixmaps, outline, pixmap);
}
cairo_restore (priv->cr);
cairo_save (context->cr);
cairo_translate (context->cr, bounds.x, bounds.y);
gdk_cairo_set_source_pixmap (context->cr, pixmap, 0, 0);
cairo_rectangle (context->cr, 0, 0, bounds.width, bounds.height);
cairo_fill (context->cr);
cairo_move_to (context->cr, 0, 0);
gdk_cairo_set_source_color (context->cr, context->fg);
eek_draw_key_label (context->cr, key, priv->fonts);
cairo_restore (context->cr);
}
static void
draw_section (EekElement *element, gpointer user_data)
prepare_keyboard_pixmap_section_callback (EekElement *element,
gpointer user_data)
{
EekKeyboard *keyboard = user_data;
EekGtkKeyboardPrivate *priv = EEK_GTK_KEYBOARD_GET_PRIVATE(keyboard);
DrawingContext *context = user_data;
EekBounds bounds;
gdk_cairo_set_source_color (priv->cr, priv->dark_color);
eek_element_get_bounds (element, &bounds);
cairo_save (context->cr);
cairo_translate (context->cr, bounds.x, bounds.y);
eek_container_foreach_child (EEK_CONTAINER(element),
prepare_keyboard_pixmap_key_callback,
context);
cairo_restore (context->cr);
}
cairo_save (priv->cr);
cairo_translate (priv->cr, bounds.x, bounds.y);
static void
drawing_context_init (DrawingContext *context, EekGtkKeyboard *keyboard)
{
EekGtkKeyboardPrivate *priv = keyboard->priv;
GtkStateType state;
GdkColormap *colormap;
#if 0
cairo_rectangle (priv->cr, 0, 0, bounds.width, bounds.height);
cairo_stroke (priv->cr);
#endif
state = gtk_widget_get_state (GTK_WIDGET (priv->widget));
context->keyboard = keyboard;
context->fg = &gtk_widget_get_style (GTK_WIDGET (priv->widget))->fg[state];
context->bg = &gtk_widget_get_style (GTK_WIDGET (priv->widget))->bg[state];
}
eek_container_foreach_child (EEK_CONTAINER(element), draw_key,
keyboard);
cairo_restore (priv->cr);
static void
prepare_keyboard_pixmap (EekGtkKeyboard *keyboard)
{
EekGtkKeyboardPrivate *priv = keyboard->priv;
GtkAllocation allocation;
GtkStateType state;
DrawingContext context;
gtk_widget_get_allocation (GTK_WIDGET (priv->widget), &allocation);
priv->pixmap =
gdk_pixmap_new (gtk_widget_get_window (GTK_WIDGET (priv->widget)),
allocation.width, allocation.height, -1);
/* blank background */
state = gtk_widget_get_state (GTK_WIDGET (priv->widget));
gdk_draw_rectangle
(priv->pixmap,
gtk_widget_get_style (GTK_WIDGET(priv->widget))->base_gc[state],
TRUE,
0, 0, allocation.width, allocation.height);
/* draw sections on the canvas */
drawing_context_init (&context, keyboard);
context.cr = gdk_cairo_create (GDK_DRAWABLE (priv->pixmap));
eek_container_foreach_child (EEK_CONTAINER(keyboard),
prepare_keyboard_pixmap_section_callback,
&context);
cairo_destroy (context.cr);
}
static gboolean
on_gtk_expose_event (GtkWidget *widget,
GdkEventExpose *event,
gpointer user_data)
on_expose_event (GtkWidget *widget,
GdkEventExpose *event,
gpointer user_data)
{
EekGtkKeyboard *keyboard = user_data;
EekGtkKeyboardPrivate *priv =
EEK_GTK_KEYBOARD_GET_PRIVATE(keyboard);
GtkStateType state = gtk_widget_get_state (GTK_WIDGET (widget));
GtkStateType state = gtk_widget_get_state (widget);
if (!priv->pixmap) {
GtkStateType state = gtk_widget_get_state (GTK_WIDGET (priv->widget));
GtkAllocation allocation;
PangoContext *context;
PangoFontDescription *default_font_desc;
context = gtk_widget_get_pango_context (GTK_WIDGET (priv->widget));
priv->layout = pango_layout_new (context);
/* compute font sizes which fit in each key shape */
PangoFontDescription *base_font;
PangoContext *context;
PangoLayout *layout;
/* compute font sizes */
default_font_desc =
gtk_widget_get_style (GTK_WIDGET(priv->widget))->font_desc;
pango_layout_set_font_description (priv->layout, default_font_desc);
eek_get_fonts (EEK_KEYBOARD(keyboard), priv->layout, priv->fonts);
context = gtk_widget_get_pango_context (priv->widget);
layout = pango_layout_new (context);
base_font = gtk_widget_get_style (priv->widget)->font_desc;
pango_layout_set_font_description (layout, base_font);
eek_get_fonts (EEK_KEYBOARD(keyboard), layout, priv->fonts);
/* create priv->pixmap */
gtk_widget_set_double_buffered (GTK_WIDGET (priv->widget), FALSE);
gtk_widget_get_allocation (GTK_WIDGET (priv->widget), &allocation);
priv->pixmap =
gdk_pixmap_new (gtk_widget_get_window (GTK_WIDGET (priv->widget)),
allocation.width, allocation.height, -1);
/* blank background */
gdk_draw_rectangle
(priv->pixmap,
gtk_widget_get_style (GTK_WIDGET(priv->widget))->base_gc[state],
TRUE,
0, 0, allocation.width, allocation.height);
/* draw sections on the canvas */
priv->cr = gdk_cairo_create (GDK_DRAWABLE (priv->pixmap));
priv->dark_color =
&gtk_widget_get_style (GTK_WIDGET (priv->widget))->dark[state];
eek_container_foreach_child (EEK_CONTAINER(keyboard), draw_section,
keyboard);
cairo_destroy (priv->cr);
priv->cr = NULL;
priv->dark_color = NULL;
prepare_keyboard_pixmap (keyboard);
}
g_return_val_if_fail (priv->pixmap, FALSE);
gdk_draw_drawable (gtk_widget_get_window (widget),
gtk_widget_get_style (widget)->fg_gc[state],
@ -234,8 +307,92 @@ on_gtk_expose_event (GtkWidget *widget,
return TRUE;
}
static void
key_enlarge (EekGtkKeyboard *keyboard, EekKey *key)
{
EekGtkKeyboardPrivate *priv =
EEK_GTK_KEYBOARD_GET_PRIVATE(keyboard);
EekBounds bounds;
EekOutline *outline;
gdouble ax, ay;
GdkPixmap *pixmap, *texture;
DrawingContext context;
GtkStateType state;
cairo_t *cr;
drawing_context_init (&context, keyboard);
eek_element_get_bounds (EEK_ELEMENT(key), &bounds);
eek_element_get_absolute_position (EEK_ELEMENT(key), &ax, &ay);
outline = eek_key_get_outline (key);
texture = g_hash_table_lookup (priv->outline_large_pixmaps, outline);
if (!texture) {
texture =
gdk_pixmap_new (gtk_widget_get_window (GTK_WIDGET (priv->widget)),
bounds.width * SCALE, bounds.height * SCALE, -1);
cr = gdk_cairo_create (GDK_DRAWABLE (texture));
cairo_scale (cr, SCALE, SCALE);
gdk_cairo_set_source_color (cr, context.bg);
cairo_rectangle (cr, 0, 0, bounds.width, bounds.height);
gdk_cairo_set_source_color (cr, context.fg);
eek_draw_outline (cr, outline);
cairo_destroy (cr);
g_hash_table_insert (priv->outline_large_pixmaps, outline, texture);
}
pixmap =
gdk_pixmap_new (gtk_widget_get_window (GTK_WIDGET (priv->widget)),
bounds.width * SCALE, bounds.height * SCALE, -1);
cr = gdk_cairo_create (GDK_DRAWABLE (pixmap));
gdk_cairo_set_source_pixmap (cr, texture, 0, 0);
cairo_rectangle (cr, 0, 0, bounds.width * SCALE, bounds.height * SCALE);
cairo_fill (cr);
cairo_move_to (cr, 0, 0);
cairo_scale (cr, SCALE, SCALE);
gdk_cairo_set_source_color (cr, context.fg);
eek_draw_key_label (cr, key, priv->fonts);
cairo_destroy (cr);
state = gtk_widget_get_state (GTK_WIDGET (priv->widget));
gdk_draw_drawable (gtk_widget_get_window (priv->widget),
gtk_widget_get_style (priv->widget)->fg_gc[state],
pixmap,
0, 0,
ax - (bounds.width * SCALE - bounds.width) / 2,
ay - (bounds.height * SCALE - bounds.height) / 2,
bounds.width * SCALE, bounds.height * SCALE);
g_object_unref (pixmap);
}
static void
key_shrink (EekGtkKeyboard *keyboard, EekKey *key)
{
EekGtkKeyboardPrivate *priv =
EEK_GTK_KEYBOARD_GET_PRIVATE(keyboard);
EekBounds bounds;
gdouble ax, ay;
GtkStateType state;
g_return_if_fail (priv->pixmap);
eek_element_get_bounds (EEK_ELEMENT(key), &bounds);
eek_element_get_absolute_position (EEK_ELEMENT(key), &ax, &ay);
state = gtk_widget_get_state (GTK_WIDGET (priv->widget));
ax -= (bounds.width * SCALE - bounds.width) / 2;
ay -= (bounds.height * SCALE - bounds.height) / 2;
gdk_draw_drawable (gtk_widget_get_window (priv->widget),
gtk_widget_get_style (priv->widget)->fg_gc[state],
priv->pixmap,
ax, ay,
ax, ay,
bounds.width * SCALE, bounds.height * SCALE);
}
static gboolean
on_gtk_button_event (GtkWidget *widget,
on_button_event (GtkWidget *widget,
GdkEventButton *event,
gpointer user_data)
{
@ -254,9 +411,11 @@ on_gtk_button_event (GtkWidget *widget,
if (key)
switch (event->type) {
case GDK_BUTTON_PRESS:
key_enlarge (EEK_GTK_KEYBOARD(keyboard), EEK_KEY(key));
g_signal_emit_by_name (keyboard, "key-pressed", key);
return TRUE;
case GDK_BUTTON_RELEASE:
key_shrink (EEK_GTK_KEYBOARD(keyboard), EEK_KEY(key));
g_signal_emit_by_name (keyboard, "key-released", key);
return TRUE;
default:
@ -275,17 +434,19 @@ eek_gtk_keyboard_get_widget (EekGtkKeyboard *keyboard)
if (!priv->widget) {
priv->widget = gtk_drawing_area_new ();
g_object_ref_sink (priv->widget);
gtk_widget_set_double_buffered (priv->widget, FALSE);
gtk_widget_set_events (priv->widget,
GDK_EXPOSURE_MASK |
GDK_KEY_PRESS_MASK |
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK);
g_signal_connect (priv->widget, "expose_event",
G_CALLBACK (on_gtk_expose_event), keyboard);
G_CALLBACK (on_expose_event), keyboard);
g_signal_connect (priv->widget, "button-press-event",
G_CALLBACK (on_gtk_button_event), keyboard);
G_CALLBACK (on_button_event), keyboard);
g_signal_connect (priv->widget, "button-release-event",
G_CALLBACK (on_gtk_button_event), keyboard);
G_CALLBACK (on_button_event), keyboard);
eek_keyboard_realize (EEK_KEYBOARD(keyboard));
}
return priv->widget;