GUITextBox.h

#pragma once

#include "EasyViewer.h"
#include "GUIText.h"

class GUITextBox : public EasyViewer {
  size_t m_cursorPos;
  bool   m_isSelected;

  std::function<void(const String&)> m_functionOnChanged;

  String& getText() { return getChildViewer<GUIText>()->m_text; }

public:
  // Set
  std::shared_ptr<EasyViewer> setText(const String& text) {
    getChildViewer<GUIText>()->m_text = text;
    return shared_from_this();
  }
  std::shared_ptr<EasyViewer> setFunctionOnChanged(std::function<void(const String&)> functionOnChanged) {
    m_functionOnChanged = functionOnChanged;
    return shared_from_this();
  }
  std::shared_ptr<EasyViewer> setFont(const Font& font) {
    getChildViewer<GUIText>()->m_font = font;
    return shared_from_this();
  }

  // Get
  const String& getText() const { return getChildViewer<GUIText>()->m_text; }

  void init() override {
    addChildViewer<GUIText>(U"", Font(16), GUIText::Mode::DrawLeftCenter);
  }

  void update() override {
    RectF(getViewerSize()).draw(Palette::White).drawFrame(2.0, 0.0, Palette::Black);

    // 枠が押されたら有効化
    if (MouseL.down()) m_isSelected = isMouseover();

    // 入力
    if (m_isSelected) {
      auto newCursorPos = TextInput::UpdateText(getText(), m_cursorPos, TextInputMode::AllowBackSpace);

      if (newCursorPos != m_cursorPos && m_functionOnChanged) m_functionOnChanged(getText());

      m_cursorPos = newCursorPos;
    }

    // 位置調整
    getChildViewer<GUIText>()->setViewerRectInLocal(RectF(getViewerSize()).stretched(-2));
  }
};