107 lines
4.7 KiB
C++
107 lines
4.7 KiB
C++
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#ifndef STAR_CANVAS_WIDGET_HPP
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#define STAR_CANVAS_WIDGET_HPP
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#include "StarWidget.hpp"
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namespace Star {
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STAR_CLASS(CanvasWidget);
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// Very simple Widget that allows easy drawing to its surface, to easily tie a
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// simplified rendering / input context into the regular widget / GuiReader
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// system.
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class CanvasWidget : public Widget {
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public:
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struct ClickEvent {
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Vec2I position;
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MouseButton button;
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// True when button down, false when key up
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bool buttonDown;
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};
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struct KeyEvent {
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Key key;
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// True when key down, false when key up
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bool keyDown;
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};
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unsigned MaximumEventBuffer = 16;
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CanvasWidget();
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void setCaptureMouseEvents(bool captureMouse);
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void setCaptureKeyboardEvents(bool captureKeyboard);
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// Returns mouse position relative to the lower left of the drawing region.
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Vec2I mousePosition() const;
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// Pulls recent click events relative to the lower left of the drawing
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// region, if configured to capture mouse events
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List<ClickEvent> pullClickEvents();
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// Pulls recent key events captured by this Canvas, if configured to capture
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// key events.
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List<KeyEvent> pullKeyEvents();
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bool sendEvent(InputEvent const& event) override;
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KeyboardCaptureMode keyboardCaptured() const override;
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// Call before drawing to clear old draw data.
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void clear();
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void drawImage(String texName, Vec2F const& position, float scale = 1.0f, Vec4B const& color = Vec4B(255, 255, 255, 255));
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void drawImageRect(String texName, RectF const& texCoords, RectF const& screenCoords, Vec4B const& color);
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void drawImageCentered(String texName, Vec2F const& position, float scale = 1.0f, Vec4B const& color = Vec4B(255, 255, 255, 255));
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void drawDrawable(Drawable drawable, Vec2F const& screenPos);
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void drawDrawables(List<Drawable> drawables, Vec2F const& screenPos);
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// Draw an image whose texture is applied over the entire screen rect in a
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// tiled manner, so that it wraps in X and Y.
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void drawTiledImage(String texName, float textureScale, Vec2D const& offset, RectF const& screenCoords, Vec4B const& color = Vec4B::filled(255));
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void drawLine(Vec2F const& begin, Vec2F const end, Vec4B const& color = Vec4B(255, 255, 255, 255), float lineWidth = 1.0f);
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void drawRect(RectF const& coords, Vec4B const& color = Vec4B(255, 255, 255, 255));
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void drawPoly(PolyF const& poly, Vec4B const& color = Vec4B(255, 255, 255, 255), float lineWidth = 1.0f);
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void drawTriangles(List<tuple<Vec2F, Vec2F, Vec2F>> const& poly, Vec4B const& color = Vec4B(255, 255, 255, 255));
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void drawText(String s, TextPositioning position, unsigned fontSize, Vec4B const& color = Vec4B(255, 255, 255, 255), FontMode mode = FontMode::Normal, float lineSpacing = Star::DefaultLineSpacing);
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protected:
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void renderImpl() override;
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void renderImage(Vec2F const& renderingOffset, String const& texName, Vec2F const& position, float scale, Vec4B const& color, bool centered);
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void renderImageRect(Vec2F const& renderingOffset, String const& texName, RectF const& texCoords, RectF const& screenCoords, Vec4B const& color);
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void renderDrawable(Vec2F const& renderingOffset, Drawable drawable, Vec2F const& screenPos);
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void renderTiledImage(Vec2F const& renderingOffset, String const& texName, float textureScale, Vec2D const& offset, RectF const& screenCoords, Vec4B const& color);
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void renderLine(Vec2F const& renderingOffset, Vec2F const& begin, Vec2F const end, Vec4B const& color, float lineWidth);
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void renderRect(Vec2F const& renderingOffset, RectF const& coords, Vec4B const& color);
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void renderPoly(Vec2F const& renderingOffset, PolyF poly, Vec4B const& color, float lineWidth);
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void renderTriangles(Vec2F const& renderingOffset, List<tuple<Vec2F, Vec2F, Vec2F>> const& triangles, Vec4B const& color);
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void renderText(Vec2F const& renderingOffset, String const& s, TextPositioning const& position, unsigned fontSize, Vec4B const& color, FontMode mode, float lineSpacing);
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private:
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bool m_captureKeyboard;
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bool m_captureMouse;
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Vec2I m_mousePosition;
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List<ClickEvent> m_clickEvents;
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List<KeyEvent> m_keyEvents;
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typedef tuple<RectF, Vec4B> RectOp;
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typedef tuple<String, Vec2F, float, Vec4B, bool> ImageOp;
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typedef tuple<String, RectF, RectF, Vec4B> ImageRectOp;
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typedef tuple<Drawable, Vec2F> DrawableOp;
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typedef tuple<String, float, Vec2D, RectF, Vec4B> TiledImageOp;
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typedef tuple<Vec2F, Vec2F, Vec4B, float> LineOp;
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typedef tuple<PolyF, Vec4B, float> PolyOp;
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typedef tuple<List<tuple<Vec2F, Vec2F, Vec2F>>, Vec4B> TrianglesOp;
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typedef tuple<String, TextPositioning, unsigned, Vec4B, FontMode, float> TextOp;
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typedef MVariant<RectOp, ImageOp, ImageRectOp, DrawableOp, TiledImageOp, LineOp, PolyOp, TrianglesOp, TextOp> RenderOp;
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List<RenderOp> m_renderOps;
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};
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}
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#endif
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