+/* $Id$
+
+This file is part of libmspgltk
+Copyright © 2007 Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
#ifndef MSP_GLTK_WIDGET_H_
#define MSP_GLTK_WIDGET_H_
namespace Msp {
namespace GLtk {
+class Panel;
class Part;
class Resources;
class Style;
+/**
+Base class for all widgets. Derived classes should call update_style in
+constructor, because it can't be done correctly in the Widget constructor.
+*/
class Widget
{
public:
- virtual ~Widget() { }
+ class Loader: public Msp::DataFile::Loader
+ {
+ protected:
+ Widget &wdg;
+
+ public:
+ Loader(Widget &);
+ Widget &get_object() const { return wdg; }
+ private:
+ void position(int, int);
+ void size(unsigned, unsigned);
+ void style(const std::string &);
+ };
+
+protected:
+ const Resources &res;
+ Geometry geom;
+ std::string style_name;
+ const Style *style;
+ State state;
+ bool visible;
+ Panel *parent;
+
+ Widget(const Resources &);
+public:
+ virtual ~Widget();
void set_position(int, int);
void set_size(unsigned, unsigned);
void set_geometry(const Geometry &);
+
+ /**
+ Sets the widget style. The final style name is constructed by concatenating
+ the widget class and the style name with a dash.
+ */
void set_style(const std::string &);
+
+ void set_visible(bool);
+
const Geometry &get_geometry() const { return geom; }
+ bool is_visible() const { return visible; }
+
void render() const;
+protected:
+ void render_graphic(const Part &) const;
+ void render_text(const Part &, const std::string &) const;
+ virtual void render_special(const Part &) const { }
+
+public:
+ // Events
virtual void button_press(int, int, unsigned) { }
virtual void button_release(int, int, unsigned) { }
virtual void pointer_motion(int, int) { }
- virtual void pointer_enter() { }
- virtual void pointer_leave() { }
-protected:
- const Resources &res;
- Geometry geom;
- std::string style_name;
- const Style *style;
- State state;
+ virtual void pointer_enter();
+ virtual void pointer_leave();
+ virtual void key_press(unsigned, unsigned, wchar_t) { }
+ virtual void key_release(unsigned, unsigned) { }
+ virtual void focus_in();
+ virtual void focus_out();
- Widget(const Resources &);
+protected:
+ /**
+ Returns the name of the widget class. Used for style lookup.
+ */
virtual const char *get_class() const { return "widget"; }
+
+ /**
+ Gets a style object from the resource collection based on the class and
+ style names of the widget.
+ */
void update_style();
- virtual void render_part(const Part &) const;
- void render_graphic(const Part &) const;
- void render_text(const Part &, const std::string &) const;
+
+ /**
+ Sets the widget's parent Panel. The widget must be unparented when calling
+ this function with a nonzero parameter.
+ */
+ void set_parent(Panel *);
+
+ /**
+ A helper function to set the parent of another widget.
+ */
+ void set_parent(Widget &, Panel *);
+
+ // More events
+ virtual void on_geometry_change() { }
+ virtual void on_style_change() { }
+ virtual void on_reparent() { }
};
} // namespace GLtk