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 | #pragma once
#include "text_control.hpp"
#include "timer.hpp"
namespace cru::ui::controls
{
    class TextBox : public TextControl
    {
    public:
        static constexpr auto control_type = L"TextBox";
        static TextBox* Create()
        {
            return new TextBox();
        }
    protected:
        TextBox();
    public:
        TextBox(const TextBox& other) = delete;
        TextBox(TextBox&& other) = delete;
        TextBox& operator=(const TextBox& other) = delete;
        TextBox& operator=(TextBox&& other) = delete;
        ~TextBox() override;
        StringView GetControlType() const override final;
    protected:
        void OnDrawContent(ID2D1DeviceContext* device_context) override;
        void OnGetFocusCore(events::FocusChangeEventArgs& args) override final;
        void OnLoseFocusCore(events::FocusChangeEventArgs& args) override final;
        void OnKeyDownCore(events::KeyEventArgs& args) override final;
        void OnCharCore(events::CharEventArgs& args) override final;
        void RequestChangeCaretPosition(unsigned position) override final;
    private:
        // return true if left
        bool GetCaretSelectionSide() const;
        void ShiftLeftSelectionRange(int count);
        void ShiftRightSelectionRange(int count);
    private:
        unsigned caret_position_ = 0;
        std::optional<TimerTask> caret_timer_{};
        Microsoft::WRL::ComPtr<ID2D1Brush> caret_brush_;
        bool is_caret_show_ = false;
    };
}
 |