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#pragma once
#include <memory>
#include <optional>
#include "ui/control.h"
namespace cru
{
namespace ui
{
namespace controls
{
struct TextRange
{
TextRange() = default;
TextRange(const int position, const int count)
: position(position), count(count)
{
}
TextRange(const TextRange& other) = default;
TextRange(TextRange&& other) = default;
TextRange& operator=(const TextRange& other) = default;
TextRange& operator=(TextRange&& other) = default;
~TextRange() = default;
unsigned position;
unsigned count;
explicit operator DWRITE_TEXT_RANGE() const
{
return DWRITE_TEXT_RANGE { position, count };
}
};
class TextBlock : public Control
{
public:
using TextLayoutHandlerPtr = FunctionPtr<void(Microsoft::WRL::ComPtr<IDWriteTextLayout>)>;
static TextBlock* Create(
const String& text = L"",
const Microsoft::WRL::ComPtr<IDWriteTextFormat>& init_text_format = nullptr,
const Microsoft::WRL::ComPtr<ID2D1Brush>& init_brush = nullptr)
{
const auto text_block = new TextBlock(init_text_format, init_brush);
text_block->SetText(text);
return text_block;
}
protected:
explicit TextBlock(
const Microsoft::WRL::ComPtr<IDWriteTextFormat>& init_text_format = nullptr,
const Microsoft::WRL::ComPtr<ID2D1Brush>& init_brush = nullptr
);
public:
TextBlock(const TextBlock& other) = delete;
TextBlock(TextBlock&& other) = delete;
TextBlock& operator=(const TextBlock& other) = delete;
TextBlock& operator=(TextBlock&& other) = delete;
~TextBlock() override;
String GetText() const
{
return text_;
}
void SetText(const String& text);
Microsoft::WRL::ComPtr<ID2D1Brush> GetBrush() const
{
return brush_;
}
void SetBrush(const Microsoft::WRL::ComPtr<ID2D1Brush>& brush);
Microsoft::WRL::ComPtr<IDWriteTextFormat> GetTextFormat() const
{
return text_format_;
}
void SetTextFormat(const Microsoft::WRL::ComPtr<IDWriteTextFormat>& text_format);
void AddTextLayoutHandler(TextLayoutHandlerPtr handler);
void RemoveTextLayoutHandler(const TextLayoutHandlerPtr& handler);
bool IsSelectable() const
{
return is_selectable_;
}
void SetSelectable(bool is_selectable);
std::optional<TextRange> GetSelectedRange() const
{
return selected_range_;
}
void SetSelectedRange(std::optional<TextRange> text_range);
protected:
void OnSizeChangedCore(events::SizeChangedEventArgs& args) override final;
void OnDraw(ID2D1DeviceContext* device_context) override;
void OnMouseDownCore(events::MouseButtonEventArgs& args) override final;
void OnMouseMoveCore(events::MouseEventArgs& args) override final;
void OnMouseUpCore(events::MouseButtonEventArgs& args) override final;
void OnLoseFocusCore(events::FocusChangeEventArgs& args) override final;
Size OnMeasure(const Size& available_size) override final;
private:
void OnTextChangedCore(const String& old_text, const String& new_text);
void CreateDefaultTextFormat();
void RecreateTextLayout();
private:
String text_;
Microsoft::WRL::ComPtr<ID2D1Brush> brush_;
Microsoft::WRL::ComPtr<ID2D1Brush> selection_brush_;
Microsoft::WRL::ComPtr<IDWriteTextFormat> text_format_;
Microsoft::WRL::ComPtr<IDWriteTextLayout> text_layout_;
Vector<TextLayoutHandlerPtr> text_layout_handlers_;
bool is_selectable_ = false;
bool is_selecting_ = false;
unsigned mouse_down_position_ = 0;
std::optional<TextRange> selected_range_ = std::nullopt;
};
}
}
}
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