Torque3D/Engine/source/gui/buttons/guiBitmapButtonCtrl.h

//-----------------------------------------------------------------------------
// Copyright (c) 2012 GarageGames, LLC
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
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// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// IN THE SOFTWARE.
//-----------------------------------------------------------------------------

#ifndef _GUIBITMAPBUTTON_H_
#define _GUIBITMAPBUTTON_H_

#ifndef _GUIBUTTONCTRL_H_
   #include "gui/buttons/guiButtonCtrl.h"
#endif
#ifndef _GFXTEXTUREMANAGER_H_
   #include "gfx/gfxTextureManager.h"
#endif


/// A button control that uses bitmaps as its different button states.
///
/// Set 'bitmap' console field to base name of bitmaps to use.  This control will
///
/// append '_n' for normal
/// append '_h' for highlighted
/// append '_d' for depressed
/// append '_i' for inactive
///
/// If a bitmap cannot be found it will use the default bitmap to render.
///
/// Additionally, a bitmap button can be made to react to keyboard modifiers.  These can be
/// either CTRL/CMD, ALT, or SHIFT (but no combination of them.)  To assign a different bitmap
/// for a modifier state, prepend "_ctrl", _"alt", or "_shift" to the state postfix.
///
/// To implement different handlers for the modifier states, use the "onDefaultClick",
/// "onCtrlClick", "onAltClick", and "onShiftClick" methods.
///
class GuiBitmapButtonCtrl : public GuiButtonCtrl
{
   public:
   
      typedef GuiButtonCtrl Parent;
      
      enum BitmapMode
      {
         BitmapStretched,
         BitmapCentered,
      };

   protected:
   
      enum Modifier
      {
         ModifierNone,
         ModifierCtrl,
         ModifierAlt,
         ModifierShift,
         
         NumModifiers
      };
   
      enum State
      {
         NORMAL,
         HILIGHT,
         DEPRESSED,
         INACTIVE
      };
      
      struct Textures
      {
         /// Texture for normal state.
         StringTableEntry mTextureNormalAssetId;
         AssetPtr<ImageAsset> mTextureNormalAsset;
         GFXTexHandle mTextureNormal;
         
         /// Texture for highlight state.
         StringTableEntry mTextureHilightAssetId;
         AssetPtr<ImageAsset> mTextureHilightAsset;
         GFXTexHandle mTextureHilight;
         
         /// Texture for depressed state.
         StringTableEntry mTextureDepressedAssetId;
         AssetPtr<ImageAsset> mTextureDepressedAsset;
         GFXTexHandle mTextureDepressed;
         
         /// Texture for inactive state.
         StringTableEntry mTextureInactiveAssetId;
         AssetPtr<ImageAsset> mTextureInactiveAsset;
         GFXTexHandle mTextureInactive;
      };

      /// Make control extents equal to bitmap size.
      bool mAutoFitExtents;
      
      /// Allow switching out images according to modifier presses.
      bool mUseModifiers;
      
      /// Allow switching images according to mouse states.  On by default.
      /// Switch off when not needed as it otherwise results in a lot of costly
      /// texture loads.
      bool mUseStates;
      
      ///
      BitmapMode mBitmapMode;

      DECLARE_IMAGEASSET(GuiBitmapButtonCtrl, Bitmap, onBitmapChange, GFXDefaultGUIProfile);
      DECLARE_ASSET_SETGET(GuiBitmapButtonCtrl, Bitmap);
      
      /// alpha masking
      bool mMasked;
      
      ///
      Textures mTextures[ NumModifiers ];
      ColorI   mColor;
      
      virtual void renderButton( GFXTexHandle &texture, const Point2I& offset, const RectI& updateRect );
      
      static bool _setAutoFitExtents( void *object, const char *index, const char *data );
      //static bool _setBitmap( void *object, const char *index, const char *data );
      
      State getState() const
      {
         if( mActive )
         {
				if( mDepressed || mStateOn ) return DEPRESSED;
            if( mHighlighted ) return HILIGHT;
            return NORMAL;
         }
         else
            return INACTIVE;
      }
      
      Modifier getCurrentModifier();
      GFXTexHandle& getTextureForCurrentState();
      
      /// @name Callbacks
      /// @{
      
      DECLARE_CALLBACK( void, onDefaultClick, () );
      DECLARE_CALLBACK( void, onCtrlClick, () );
      DECLARE_CALLBACK( void, onAltClick, () );
      DECLARE_CALLBACK( void, onShiftClick, () );
      
      /// @}

      void onBitmapChange()
      {
         setBitmap(getBitmap());
      }

   public:
                           
      GuiBitmapButtonCtrl();

      void setAutoFitExtents( bool state );
      void setBitmap( StringTableEntry name );
      void setBitmapHandles( GFXTexHandle normal, GFXTexHandle highlighted, GFXTexHandle depressed, GFXTexHandle inactive );

      //Parent methods
      virtual bool onWake();
      virtual void onSleep();
      virtual void onAction();
      virtual void inspectPostApply();

      virtual void onRender(Point2I offset, const RectI &updateRect);

      static void initPersistFields();
      bool pointInControl(const Point2I& parentCoordPoint);

      DECLARE_CONOBJECT(GuiBitmapButtonCtrl);
      DECLARE_DESCRIPTION( "A button control rendered entirely from bitmaps.\n"
                           "The individual button states are represented with separate bitmaps." );

      //Basically a wrapper function to do our special state handling setup when the fields change
      static bool _setBitmapFieldData(void* obj, const char* index, const char* data)
      {
         GuiBitmapButtonCtrl* object = static_cast<GuiBitmapButtonCtrl*>(obj); 
         object->setBitmap(StringTable->insert(data)); 
         return false; 
      }
};

typedef GuiBitmapButtonCtrl::BitmapMode GuiBitmapMode;
DefineEnumType( GuiBitmapMode );

/// Extension of GuiBitmapButtonCtrl that also display a text label on the button.
class GuiBitmapButtonTextCtrl : public GuiBitmapButtonCtrl
{
   public:
   
      typedef GuiBitmapButtonCtrl Parent;
      
   protected:
   
      virtual void renderButton( GFXTexHandle &texture, const Point2I& offset, const RectI& updateRect );

   public:

      DECLARE_CONOBJECT( GuiBitmapButtonTextCtrl );
      DECLARE_DESCRIPTION( "An extension of GuiBitmapButtonCtrl that also renders a text\n"
                           "label on the button." );
};

#endif //_GUI_BITMAP_BUTTON_CTRL_H