ES-DE/es-core/src/components/TextComponent.h

//
//  TextComponent.h
//
//  Displays text.
//

#pragma once
#ifndef ES_CORE_COMPONENTS_TEXT_COMPONENT_H
#define ES_CORE_COMPONENTS_TEXT_COMPONENT_H

#include "resources/Font.h"
#include "GuiComponent.h"

class ThemeData;

// Used to display text.
// TextComponent::setSize(x, y) works a little differently than most components:
//  * (0, 0)                    - Will automatically calculate a size that fits
//                                the text on one line (expand horizontally).
//  * (x != 0, 0)               - Wrap text so that it does not reach beyond x. Will
//                                automatically calculate a vertical size (expand vertically).
//  * (x != 0, y <= fontHeight) - Will truncate text so it fits within this box.
class TextComponent : public GuiComponent
{
public:
    TextComponent(Window* window);
    TextComponent(
            Window* window,
            const std::string& text,
            const std::shared_ptr<Font>& font,
            unsigned int color = 0x000000FF,
            Alignment align = ALIGN_LEFT,
            Vector3f pos = Vector3f::Zero(),
            Vector2f size = Vector2f::Zero(),
            unsigned int bgcolor = 0x00000000);

    void setFont(const std::shared_ptr<Font>& font);
    void setUppercase(bool uppercase);
    void onSizeChanged() override;
    void setText(const std::string& text);
    void setColor(unsigned int color) override;
    void setHorizontalAlignment(Alignment align);
    void setVerticalAlignment(Alignment align);
    void setLineSpacing(float spacing);
    void setBackgroundColor(unsigned int color);
    void setRenderBackground(bool render);

    unsigned int getColor() const override { return mColor; };
    void render(const Transform4x4f& parentTrans) override;

    std::string getValue() const override;
    void setValue(const std::string& value) override;

    unsigned char getOpacity() const override;
    void setOpacity(unsigned char opacity) override;

    inline std::shared_ptr<Font> getFont() const { return mFont; }

    virtual void applyTheme(const std::shared_ptr<ThemeData>& theme, const std::string& view,
            const std::string& element, unsigned int properties) override;

protected:
    virtual void onTextChanged();

    std::string mText;
    std::shared_ptr<Font> mFont;

private:
    void calculateExtent();

    void onColorChanged();

    unsigned int mColor;
    unsigned int mBgColor;
    unsigned char mColorOpacity;
    unsigned char mBgColorOpacity;
    bool mRenderBackground;

    bool mUppercase;
    Vector2i mAutoCalcExtent;
    std::shared_ptr<TextCache> mTextCache;
    Alignment mHorizontalAlignment;
    Alignment mVerticalAlignment;
    float mLineSpacing;
};

#endif // ES_CORE_COMPONENTS_TEXT_COMPONENT_H