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107 lines
3.3 KiB
C++
107 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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//
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// CImageIconMixin
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// Mike Pinkerton, Netscape Communications
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//
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// When you have an object that wants to draw itself using an image (gif, jpeg, etc),
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// just mix this class in and call the appropriate routines when you want to draw.
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// Most importantly, this handles cleaning up when the object goes away if it has
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// made a request for an image that has yet to arrive.
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//
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#pragma once
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#include <string>
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#include "CIconCache.h"
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#include "mimages.h"
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//
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// class CImageIconMixin
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//
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// Draw an image, most likely as an icon.
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//
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class CImageIconMixin : public LListener
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{
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public:
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CImageIconMixin ( ) { } ;
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CImageIconMixin ( const string & inURL ) ;
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virtual ~CImageIconMixin ( ) ;
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// Change the url telling us which image to load. Safe to call even when an image
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// load is pending, but will NOT re-request the new image.
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virtual void SetImageURL ( const string & inNewURL ) ;
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// Draw the image. Will begin loading it if the data has not yet arrived and will
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// draw the standby in its place. Pass zero's for width and height to use image defaults
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// or the image will be scaled to what you put in.
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void DrawImage ( const Point & inTopLeft, IconTransformType inTransform,
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Uint32 inWidth, Uint32 inHeight ) const;
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protected:
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// catch the message that the image is ready to draw
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virtual void ListenToMessage ( MessageT inMessage, void* ioPtr ) ;
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// called when the image is ready to draw. This should do something like
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// refresh the view.
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virtual void ImageIsReady ( ) = 0;
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// Draw a scaled image as an icon. Override to draw differently
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virtual void DoDrawing ( DrawingState & inState, const Point & inTopLeft,
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IconTransformType inTransform, Uint32 inWidth,
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Uint32 inHeight ) const ;
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// Draw something when the real image is not yet here.
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virtual void DrawStandby ( const Point & inTopLeft, IconTransformType inTransform ) const = 0;
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private:
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string mURL;
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}; // class CImageIconMixin
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//
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// class CTiledImageMixin
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//
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// Tile an image, for use as backgrounds in chrome or tables
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//
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class CTiledImageMixin : public CImageIconMixin
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{
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public:
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CTiledImageMixin ( ) { };
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CTiledImageMixin ( const string & inURL ) ;
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virtual ~CTiledImageMixin ( ) ;
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protected:
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// Draw a image as a tiled image for drawing backgrounds. Width and Height are
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// reinterpreted to mean the width and height of the area the image is being tiled
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// in.
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virtual void DoDrawing ( DrawingState & inState, const Point & inTopLeft,
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IconTransformType inTransform, Uint32 inWidth,
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Uint32 inHeight ) const ;
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}; // class CTiledImageMixin
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