From 0d831968949b1119db48530a86c2d1651c6cbfc6 Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Sat, 11 Oct 2008 09:37:23 +0000
Subject: zonechange events, menu previous command

---
 src/ui/ui.cc     | 29 ++++++++++++++++++++++++++---
 src/ui/ui.h      |  3 +++
 src/ui/window.cc | 10 ++++++++++
 src/ui/window.h  | 13 +++++++++++++
 4 files changed, 52 insertions(+), 3 deletions(-)

(limited to 'src/ui')

diff --git a/src/ui/ui.cc b/src/ui/ui.cc
index bba9ea6..8242381 100644
--- a/src/ui/ui.cc
+++ b/src/ui/ui.cc
@@ -89,9 +89,11 @@ void help_menu()
 	con_print << "^Bmenu functions" << std::endl;
 	con_print << "  menu help          show this help" << std::endl;
 	con_print << "  menu list          list available menus" << std::endl;
-	con_print << "  menu hide          hide the current menu" << std::endl;
-	con_print << "  menu close         close the current menu" << std::endl;
 	con_print << "  menu [name]        show a menu" << std::endl;
+	con_print << "  menu back          return to the previous menu" << std::endl;
+	con_print << "  menu previous      return to the previous menu" << std::endl;
+	con_print << "  menu close         close the current menu" << std::endl;
+	con_print << "  menu hide          hide the current menu" << std::endl;
 	root()->list_menus();
 }
 
@@ -117,6 +119,12 @@ void func_menu(std::string const &args)
 	} else if (command.compare("close") == 0) {
 		root()->hide_window();
 
+	} else if (command.compare("back") == 0) {
+		root()->previous_window();
+
+	} else if (command.compare("previous") == 0) {
+		root()->previous_window();
+
 	} else if (command.compare("list") == 0) {
 		root()->list_menus();
 	} else {
@@ -345,8 +353,12 @@ void UI::show_window(const char *label)
 	Window *window = find_window(label);
 
 	if (window) {
-			if (ui_active_window)
+			if (ui_active_window) {
 				ui_active_window->hide();
+				window->set_previous(ui_active_window);
+			} else {
+				window->clear_previous();
+			}
 			ui_active_window = window;
 			ui_active_window->event_resize();
 			ui_active_window->raise();
@@ -365,6 +377,17 @@ void UI::hide_window()
 	}
 }
 
+void UI::previous_window()
+{
+	if (ui_active_window) {
+		if (ui_active_window->previous().size()) {
+			show_window(ui_active_window->previous().c_str());
+		} else {
+			hide_window();
+		}
+	}
+}
+
 void UI::frame()
 {
 	ui_focus = event_focus(mouse_cursor);
diff --git a/src/ui/ui.h b/src/ui/ui.h
index 3a4ba75..a555e97 100644
--- a/src/ui/ui.h
+++ b/src/ui/ui.h
@@ -37,6 +37,9 @@ public:
 	/// hide the active window
 	void hide_window();
 
+	/// show previous window
+	void previous_window();
+
 	/// return the active window
 	Window *active() { return ui_active_window; }
 
diff --git a/src/ui/window.cc b/src/ui/window.cc
index b18348b..cc9f3b5 100644
--- a/src/ui/window.cc
+++ b/src/ui/window.cc
@@ -24,6 +24,16 @@ Window::~Window()
 	window_children.clear();
 }
 
+void Window::set_previous(Window *previous)
+{
+	window_previous.assign(previous->label());
+}
+
+void Window::clear_previous()
+{
+	window_previous.clear();
+}
+
 void Window::draw_border()
 {
 	if (!border())
diff --git a/src/ui/window.h b/src/ui/window.h
index f88d5aa..a134f04 100644
--- a/src/ui/window.h
+++ b/src/ui/window.h
@@ -19,6 +19,13 @@ public:
 
 	virtual void draw_border();
 
+	/// set the label of the previous window
+	void set_previous(Window *previous);
+	/// clear the label of the previous window
+	void clear_previous();
+
+	inline std::string const &previous() const { return window_previous; }
+
 protected:
 	typedef std::list<Window *> Windows;
 	Windows		window_children;
@@ -27,6 +34,12 @@ protected:
 
 	virtual void add_window(Window *window);
 	virtual void remove_window(Window *window);
+
+	/// label of the previous window that got activated
+	/** This label is used to implement the 'menu previous'
+	 *  command
+	 */
+	std::string	window_previous;
 };
 
 }
-- 
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