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75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
// SPDX-License-Identifier: MIT
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//
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// EmulationStation Desktop Edition
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// NinePatchComponent.h
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//
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// Breaks up an image into 3x3 patches to accomodate resizing without distortions.
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//
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#ifndef ES_CORE_COMPONENTS_NINE_PATCH_COMPONENT_H
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#define ES_CORE_COMPONENTS_NINE_PATCH_COMPONENT_H
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#include "GuiComponent.h"
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#include "renderers/Renderer.h"
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class TextureResource;
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// Display an image in a way so that edges don't get too distorted no matter the final size.
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// Useful for UI elements like backgrounds, buttons, etc.
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// This is accomplished by splitting an image into 9 pieces:
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// ___________
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// |_1_|_2_|_3_|
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// |_4_|_5_|_6_|
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// |_7_|_8_|_9_|
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//
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// Corners (1, 3, 7, 9) will not be stretched at all.
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// Borders (2, 4, 6, 8) will be stretched along one axis (2 and 8 horizontally, 4 and 6 vertically).
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// The center (5) will be stretched.
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class NinePatchComponent : public GuiComponent
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{
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public:
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NinePatchComponent(Window* window,
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const std::string& path = "",
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unsigned int edgeColor = 0xFFFFFFFF,
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unsigned int centerColor = 0xFFFFFFFF);
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virtual ~NinePatchComponent();
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void render(const glm::mat4& parentTrans) override;
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void onSizeChanged() override { buildVertices(); }
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void fitTo(glm::vec2 size, glm::vec3 position = {}, glm::vec2 padding = {});
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void setImagePath(const std::string& path);
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// Apply a color shift to the "edge" parts of the ninepatch.
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void setEdgeColor(unsigned int edgeColor);
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// Apply a color shift to the "center" part of the ninepatch.
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void setCenterColor(unsigned int centerColor);
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virtual void applyTheme(const std::shared_ptr<ThemeData>& theme,
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const std::string& view,
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const std::string& element,
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unsigned int properties) override;
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const glm::vec2& getCornerSize() const { return mCornerSize; }
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void setCornerSize(const glm::vec2& size)
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{
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mCornerSize = size;
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buildVertices();
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}
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private:
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void buildVertices();
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void updateColors();
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Renderer::Vertex* mVertices;
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std::string mPath;
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glm::vec2 mCornerSize;
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unsigned int mEdgeColor;
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unsigned int mCenterColor;
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std::shared_ptr<TextureResource> mTexture;
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};
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#endif // ES_CORE_COMPONENTS_NINE_PATCH_COMPONENT_H
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