44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
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//
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// This source code is property of the Computer Graphics and Visualization
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// chair of the TU Dresden. Do not distribute in modified or unmodified form!
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// Copyright (C) 2016 CGV TU Dresden - All Rights Reserved
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//
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/*************************************************************************
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Helper class to render previews.
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This class renders definable shapes. It is used to display the previews
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for the drawing tools. It can be enabled/disabled and rendered using the
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"render" method.
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*************************************************************************/
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#pragma once
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// provides the declaration of the super class tool_base
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#include "tool_base.h"
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class preview_renderer
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{
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public:
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// Initialize the preview renderer
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preview_renderer();
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// Enable rendering of previews
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void enable_rendering();
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// Disable rendering of previews
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void disable_rendering();
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// Set the start of a 2-point shape
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void set_start(int x, int y);
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// Set the destination of a 2-point shape
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void set_dest(int x, int y);
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// Set the shape
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void set_shape(ToolShape shape);
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// Render the preview
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void render();
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private:
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// The actual shape id
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ToolShape shape;
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// Start and destination of the shape
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int start_x, start_y, dest_x, dest_y;
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// State indicating whether rendering is enabled
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bool enabled;
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};
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