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newgui.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2002-2004 The ScummVM project
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/gui/newgui.h,v 1.47 2004/11/25 23:35:02 fingolfin Exp $
 */

#ifndef NEWGUI_H
#define NEWGUI_H

#include "common/scummsys.h"
#include "common/singleton.h"
#include "common/stack.h"
#include "common/str.h"
#include "common/system.h"    // For events
#include "graphics/font.h"

namespace GUI {

class Dialog;

#define g_gui     (GUI::NewGui::instance())


// Height of a single text line
#define kLineHeight     (g_gui.getFont().getFontHeight() + 2)


using Graphics::TextAlignment;
using Graphics::kTextAlignCenter;
using Graphics::kTextAlignLeft;
using Graphics::kTextAlignRight;


// Simple dialog stack class
// Anybody nesting dialogs deeper than 4 is mad anyway
typedef Common::FixedStack<Dialog *> DialogStack;


/**
 * GUI manager singleton.
 */ 
00056 class NewGui : public Common::Singleton<NewGui> {
      typedef Common::String String;
      friend class Dialog;
      friend class Common::Singleton<NewGui>;
      NewGui();
public:

      // Main entry for the GUI: this will start an event loop that keeps running
      // until no dialogs are active anymore.
      void runLoop();

      bool isActive()   { return ! _dialogStack.empty(); }

protected:
      OSystem           *_system;
      Graphics::Surface       _screen;
      int               _screenPitch;
      
      bool        _needRedraw;
      DialogStack _dialogStack;
      
      bool        _stateIsSaved;
      
      // for continuous events (keyDown)
      struct {
            uint16 ascii;
            byte flags;
            int keycode;
      } _currentKeyDown;
      uint32            _keyRepeatTime;
      
      // position and time of last mouse click (used to detect double clicks)
      struct {
            int16 x, y; // Position of mouse when the click occured
            uint32 time;      // Time
            int count;  // How often was it already pressed?
      } _lastClick;
      
      // mouse cursor state
      bool        _oldCursorMode;
      int               _cursorAnimateCounter;
      int               _cursorAnimateTimer;
      byte        _cursor[2048];

      void saveState();
      void restoreState();
      
      void openDialog(Dialog *dialog);
      void closeTopDialog();
      
      void loop();

      void animateCursor();
      void updateColors();

      OverlayColor *getBasePtr(int x, int y);

public:
      // Theme colors
      OverlayColor _color, _shadowcolor;
      OverlayColor _bgcolor;
      OverlayColor _textcolor;
      OverlayColor _textcolorhi;
      
      // Font
      const Graphics::Font &getFont() const;

      // Drawing primitives
      void box(int x, int y, int width, int height, OverlayColor colorA, OverlayColor colorB);
      void hLine(int x, int y, int x2, OverlayColor color);
      void vLine(int x, int y, int y2, OverlayColor color);
      void blendRect(int x, int y, int w, int h, OverlayColor color, int level = 3);
      void fillRect(int x, int y, int w, int h, OverlayColor color);
      void frameRect(int x, int y, int w, int h, OverlayColor color);

      void drawChar(byte c, int x, int y, OverlayColor color, const Graphics::Font *font = 0);
      void drawString(const String &str, int x, int y, int w, OverlayColor color, Graphics::TextAlignment align = Graphics::kTextAlignLeft, int deltax = 0, bool useEllipsis = true);

      int getStringWidth(const String &str);
      int getCharWidth(byte c);

      void drawBitmap(uint32 *bitmap, int x, int y, OverlayColor color, int h = 8);

      void addDirtyRect(int x, int y, int w, int h);
};

} // End of namespace GUI

#endif

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