Added basic onscreen symbol menu.
So far it does not add symbols to the document, as there is momentarily no interface for neither the document nor the canvas.
This commit is contained in:
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263aa9062e
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8f2dad4ead
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@ -33,7 +33,57 @@
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*/
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/* Private members of the window. */
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typedef struct _SymbolMenuItem SymbolMenuItem;
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typedef struct _SymbolMenuData SymbolMenuData;
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typedef struct _DocumentData DocumentData;
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/*
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* SymbolMenuItem:
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*
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* Data related to a symbol in an open symbol menu.
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*/
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struct _SymbolMenuItem
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{
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LdSymbol *symbol;
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gint width;
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gdouble scale;
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};
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/*
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* SymbolMenuData:
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*
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* Data related to the currently opened symbol menu.
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*/
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struct _SymbolMenuData
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{
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gulong expose_handler;
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gulong motion_notify_handler;
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gulong button_release_handler;
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GtkToggleButton *active_button;
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SymbolMenuItem *items;
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gint n_items;
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gint active_item;
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gint menu_width;
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gint menu_height;
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gint menu_y;
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};
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/*
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* DocumentData:
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*
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* Data related to the current document.
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*/
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struct _DocumentData
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{
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LdDocument *document;
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const gchar *file_name;
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/* Canvas viewport settings (for multitabbed) */
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};
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struct _LdWindowMainPrivate
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{
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GtkUIManager *ui_manager;
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@ -48,13 +98,8 @@ struct _LdWindowMainPrivate
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GtkWidget *statusbar;
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guint statusbar_menu_context_id;
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};
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struct _DocumentData
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{
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LdDocument *document;
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const gchar *file_name;
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/* Canvas viewport settings (for multitabbed) */
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SymbolMenuData symbol_menu;
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};
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/* Define the type. */
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@ -70,6 +115,15 @@ static void ld_window_main_finalize (GObject *gobject);
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static void load_toolbar (LdWindowMain *self);
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static void load_category_cb (gpointer data, gpointer user_data);
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static void redraw_symbol_menu (LdWindowMain *self);
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static void on_category_toggle (GtkToggleButton *toggle_button,
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gpointer user_data);
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static gboolean on_canvas_exposed (GtkWidget *widget,
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GdkEventExpose *event, gpointer user_data);
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static gboolean on_canvas_motion_notify (GtkWidget *widget,
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GdkEventMotion *event, gpointer user_data);
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static gboolean on_canvas_button_release (GtkWidget *widget,
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GdkEventButton *event, gpointer user_data);
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static void on_ui_proxy_connected (GtkUIManager *ui, GtkAction *action,
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GtkWidget *proxy, LdWindowMain *window);
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@ -215,6 +269,31 @@ ld_window_main_init (LdWindowMain *self)
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/* Canvas. */
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/* TODO: Put it into a GtkScrolledWindow. */
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priv->canvas = ld_canvas_new ();
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/* TODO: To be able to draw a symbol menu over the canvas, we may:
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* 1. Hook the expose-event and button-{press,release}-event signals.
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* 2. Create a hook mechanism in the LdCanvas object.
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* + The cairo context would not have to be created twice.
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* - More complex API.
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*/
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priv->symbol_menu.expose_handler = g_signal_connect (priv->canvas,
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"expose-event", G_CALLBACK (on_canvas_exposed), self);
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priv->symbol_menu.motion_notify_handler = g_signal_connect (priv->canvas,
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"motion-notify-event", G_CALLBACK (on_canvas_motion_notify), self);
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priv->symbol_menu.button_release_handler = g_signal_connect (priv->canvas,
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"button-release-event", G_CALLBACK (on_canvas_button_release), self);
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gtk_widget_add_events (GTK_WIDGET (priv->canvas),
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GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK
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| GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK);
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/* Don't render anything over the canvas yet. */
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g_signal_handler_block (priv->canvas,
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priv->symbol_menu.expose_handler);
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g_signal_handler_block (priv->canvas,
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priv->symbol_menu.motion_notify_handler);
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g_signal_handler_block (priv->canvas,
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priv->symbol_menu.button_release_handler);
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gtk_box_pack_start (GTK_BOX (priv->hbox), GTK_WIDGET (priv->canvas),
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TRUE, TRUE, 0);
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@ -253,41 +332,6 @@ ld_window_main_finalize (GObject *gobject)
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G_OBJECT_CLASS (ld_window_main_parent_class)->finalize (gobject);
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}
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/*
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* load_category_cb:
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*
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* A foreach callback for adding categories into the toolbar.
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*/
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static void
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load_category_cb (gpointer data, gpointer user_data)
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{
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const gchar *name;
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LdSymbolCategory *cat;
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LdWindowMain *self;
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GdkPixbuf *pbuf;
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GtkWidget *img;
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GtkToolItem *item;
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g_return_if_fail (LD_IS_WINDOW_MAIN (user_data));
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self = user_data;
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g_return_if_fail (LD_IS_SYMBOL_CATEGORY (data));
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cat = data;
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name = ld_symbol_category_get_name (cat);
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pbuf = gdk_pixbuf_new_from_file_at_size
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(ld_symbol_category_get_image_path (cat), TOOLBAR_ICON_WIDTH, -1, NULL);
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g_return_if_fail (pbuf != NULL);
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img = gtk_image_new_from_pixbuf (pbuf);
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g_object_unref (pbuf);
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item = gtk_tool_button_new (img, name);
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gtk_tool_item_set_tooltip_text (item, name);
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gtk_toolbar_insert (GTK_TOOLBAR (self->priv->toolbar), item, 0);
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}
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/*
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* load_toolbar:
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*
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@ -306,6 +350,293 @@ load_toolbar (LdWindowMain *self)
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g_slist_foreach (categories, load_category_cb, self);
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}
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/*
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* load_category_cb:
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*
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* A foreach callback for adding categories into the toolbar.
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*/
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static void
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load_category_cb (gpointer data, gpointer user_data)
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{
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LdWindowMain *self;
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LdSymbolCategory *cat;
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const gchar *name;
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GdkPixbuf *pbuf;
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GtkWidget *img;
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GtkToolItem *item;
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GtkWidget *button;
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g_return_if_fail (LD_IS_WINDOW_MAIN (user_data));
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g_return_if_fail (LD_IS_SYMBOL_CATEGORY (data));
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self = user_data;
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cat = data;
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name = ld_symbol_category_get_name (cat);
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pbuf = gdk_pixbuf_new_from_file_at_size
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(ld_symbol_category_get_image_path (cat), TOOLBAR_ICON_WIDTH, -1, NULL);
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g_return_if_fail (pbuf != NULL);
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img = gtk_image_new_from_pixbuf (pbuf);
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g_object_unref (pbuf);
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item = gtk_tool_item_new ();
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button = gtk_toggle_button_new ();
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gtk_container_add (GTK_CONTAINER (button), img);
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gtk_container_add (GTK_CONTAINER (item), button);
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/* Assign the category to the toggle button. */
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g_object_ref (cat);
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g_object_set_data_full (G_OBJECT (button),
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"category", cat, (GDestroyNotify) g_object_unref);
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/* Hook toggling of the button. */
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g_signal_connect (button, "toggled", G_CALLBACK (on_category_toggle), self);
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gtk_tool_item_set_tooltip_text (item, name);
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gtk_toolbar_insert (GTK_TOOLBAR (self->priv->toolbar), item, 0);
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}
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/*
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* redraw_symbol_menu:
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*
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* Make the area for symbol menu redraw itself.
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*/
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/* XXX: Ideally it should repaint just what's needed. */
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static void
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redraw_symbol_menu (LdWindowMain *self)
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{
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SymbolMenuData *data;
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g_return_if_fail (LD_IS_WINDOW_MAIN (self));
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data = &self->priv->symbol_menu;
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gtk_widget_queue_draw_area (GTK_WIDGET (self->priv->canvas),
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0, data->menu_y - 1, data->menu_width + 2, data->menu_height + 2);
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}
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/*
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* on_category_toggle:
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*
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* Show or hide a symbol menu.
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*/
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static void
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on_category_toggle (GtkToggleButton *toggle_button, gpointer user_data)
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{
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LdWindowMain *self;
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LdWindowMainPrivate *priv;
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LdSymbolCategory *cat;
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SymbolMenuData *data;
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g_return_if_fail (LD_IS_WINDOW_MAIN (user_data));
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cat = g_object_get_data (G_OBJECT (toggle_button), "category");
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self = LD_WINDOW_MAIN (user_data);
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priv = self->priv;
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data = &priv->symbol_menu;
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/* First untoggle any active button. */
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if (data->active_button)
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gtk_toggle_button_set_active (data->active_button, FALSE);
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/* And toggle signal handlers that enable the user to add a symbol. */
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if (data->active_button == toggle_button)
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{
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gint i;
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g_signal_handler_block (priv->canvas,
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priv->symbol_menu.expose_handler);
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g_signal_handler_block (priv->canvas,
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priv->symbol_menu.motion_notify_handler);
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g_signal_handler_block (priv->canvas,
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priv->symbol_menu.button_release_handler);
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g_object_unref (data->active_button);
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data->active_button = NULL;
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/* Ashes to ashes, NULL to NULL. */
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for (i = 0; i < data->n_items; i++)
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g_object_unref (data->items[i].symbol);
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g_free (data->items);
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data->items = NULL;
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}
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else
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{
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const GSList *children, *symbol_iter;
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SymbolMenuItem *item;
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gint x, y, menu_width;
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g_return_if_fail (gtk_widget_translate_coordinates (GTK_WIDGET
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(toggle_button), GTK_WIDGET (priv->canvas), 0, 0, &x, &y));
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data->menu_y = y;
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data->menu_height = GTK_WIDGET (toggle_button)->allocation.height;
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g_signal_handler_unblock (priv->canvas,
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priv->symbol_menu.expose_handler);
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g_signal_handler_unblock (priv->canvas,
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priv->symbol_menu.motion_notify_handler);
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g_signal_handler_unblock (priv->canvas,
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priv->symbol_menu.button_release_handler);
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data->active_button = toggle_button;
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g_object_ref (data->active_button);
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children = ld_symbol_category_get_children (cat);
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data->n_items = g_slist_length ((GSList *) children);
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data->items = g_new (SymbolMenuItem, data->n_items);
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data->active_item = -1;
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item = data->items;
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menu_width = 0;
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for (symbol_iter = children; symbol_iter;
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symbol_iter = symbol_iter->next)
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{
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LdSymbolArea area;
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item->symbol = LD_SYMBOL (symbol_iter->data);
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g_object_ref (item->symbol);
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ld_symbol_get_area (item->symbol, &area);
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/* This is the height when the center of the symbol is
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* in the center of it's symbol menu item.
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*/
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item->scale = data->menu_height * 0.5
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/ MAX (ABS (area.y1), ABS (area.y2)) / 2;
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/* FIXME: The width is probably wrong (related to the center). */
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item->width = item->scale * ABS (area.x2 - area.x1)
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+ data->menu_height * 0.5;
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menu_width += item++->width;
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}
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data->menu_width = menu_width;
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}
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redraw_symbol_menu (self);
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}
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/*
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* on_canvas_exposed:
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*
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* Draw a symbol menu.
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*/
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static gboolean
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on_canvas_exposed (GtkWidget *widget, GdkEventExpose *event, gpointer user_data)
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{
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cairo_t *cr;
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LdWindowMain *self;
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SymbolMenuData *data;
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gint i, x;
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cr = gdk_cairo_create (widget->window);
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self = LD_WINDOW_MAIN (user_data);
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data = &self->priv->symbol_menu;
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/* Draw some border. */
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cairo_set_line_width (cr, 1);
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cairo_rectangle (cr, 0, data->menu_y, data->menu_width, data->menu_height);
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cairo_set_source_rgb (cr, 1, 1, 1);
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cairo_fill (cr);
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/* Draw all symbols from that category. */
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for (x = i = 0; i < data->n_items; i++)
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{
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SymbolMenuItem *item;
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item = data->items + i;
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cairo_save (cr);
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cairo_rectangle (cr, x, data->menu_y, item->width, data->menu_height);
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cairo_clip (cr);
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if (i == data->active_item)
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{
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cairo_set_source_rgb (cr, 0.9, 0.9, 0.9);
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cairo_paint (cr);
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}
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cairo_translate (cr, x + (gdouble) item->width / 2,
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data->menu_y + (gdouble) data->menu_height / 2);
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cairo_scale (cr, item->scale, item->scale);
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cairo_set_source_rgb (cr, 0, 0, 0);
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cairo_set_line_width (cr, 1 / item->scale);
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ld_symbol_draw (item->symbol, cr);
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cairo_restore (cr);
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x += item->width;
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}
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cairo_rectangle (cr, 0, data->menu_y, data->menu_width, data->menu_height);
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cairo_set_source_rgb (cr, 0, 0, 0);
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cairo_stroke (cr);
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cairo_destroy (cr);
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return FALSE;
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}
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static gboolean
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on_canvas_motion_notify (GtkWidget *widget, GdkEventMotion *event,
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gpointer user_data)
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{
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LdWindowMain *self;
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SymbolMenuData *data;
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gint i, x;
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self = LD_WINDOW_MAIN (user_data);
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data = &self->priv->symbol_menu;
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if (event->x < 0 || event->y < data->menu_y
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|| event->y >= data->menu_y + data->menu_height)
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{
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data->active_item = -1;
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redraw_symbol_menu (self);
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return FALSE;
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}
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for (x = i = 0; i < data->n_items; i++)
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{
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x += data->items[i].width;
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if (event->x < x)
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{
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data->active_item = i;
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redraw_symbol_menu (self);
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return FALSE;
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}
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}
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data->active_item = -1;
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redraw_symbol_menu (self);
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return FALSE;
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}
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static gboolean
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on_canvas_button_release (GtkWidget *widget, GdkEventButton *event,
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gpointer user_data)
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{
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LdWindowMain *self;
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SymbolMenuData *data;
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self = LD_WINDOW_MAIN (user_data);
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data = &self->priv->symbol_menu;
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if (event->button != 1)
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return FALSE;
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/* TODO: Add the selected symbol into the document on the position. */
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/* We've either chosen a symbol or canceled the menu, so hide it. */
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if (data->active_button)
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gtk_toggle_button_set_active (data->active_button, FALSE);
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return FALSE;
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}
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/*
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* on_ui_proxy_connected:
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*
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