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public/vgui_controls/MenuButton.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef MENUBUTTON_H
+#define MENUBUTTON_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include <vgui_controls/Button.h>
+#include "vgui_controls/Menu.h"
+
+namespace vgui
+{
+
+class Menu;
+class TextImage;
+
+//-----------------------------------------------------------------------------
+// Purpose: Button that displays a menu when pressed
+//-----------------------------------------------------------------------------
+class MenuButton : public Button
+{
+	DECLARE_CLASS_SIMPLE( MenuButton, Button );
+
+public:
+	MenuButton(Panel *parent, const char *panelName, const char *text);
+	~MenuButton();
+
+	// functions designed to be overriden
+	virtual void OnShowMenu(Menu *menu) {}
+	virtual void OnHideMenu(Menu *menu) {}
+	virtual int	 OnCheckMenuItemCount() { return 0; }
+
+	virtual void SetMenu(Menu *menu);
+	virtual void HideMenu(void);
+	virtual void DrawFocusBorder(int tx0, int ty0, int tx1, int ty1);
+	MESSAGE_FUNC( OnMenuClose, "MenuClose" );
+	MESSAGE_FUNC_PARAMS( OnKillFocus, "KillFocus", kv );		// called after the panel loses the keyboard focus
+	virtual void DoClick();
+	virtual void SetOpenOffsetY(int yOffset);
+
+    virtual bool CanBeDefaultButton(void);
+
+	// sets the direction in which the menu opens from the button, defaults to down
+	virtual void SetOpenDirection(Menu::MenuDirection_e direction);
+
+	virtual void OnKeyCodeTyped(KeyCode code);
+	virtual void OnCursorEntered();
+
+	virtual void Paint();
+	virtual void PerformLayout();
+	virtual void ApplySchemeSettings( IScheme *pScheme );
+	virtual void OnCursorMoved( int x, int y );
+
+	// This style is like the IE "back" button where the left side acts like a regular button, the the right side has a little
+	//  combo box dropdown indicator and presents and submenu
+	void  SetDropMenuButtonStyle( bool state );
+	bool	IsDropMenuButtonStyle() const;
+
+	Menu	*GetMenu();
+
+private:
+	
+	Menu *m_pMenu;
+	Menu::MenuDirection_e m_iDirection;
+
+	int _openOffsetY; // vertical offset of menu from the menu button
+
+	bool		m_bDropMenuButtonStyle : 1;
+	TextImage	*m_pDropMenuImage;
+	int			m_nImageIndex;
+};
+
+}; // namespace vgui
+
+#endif // MENUBUTTON_H