selectTool method

void selectTool(EditToolsMenu tool)

切换主工具

Implementation

void selectTool(EditToolsMenu tool) {
  if (isSingleToolMode) return;
  EditToolsMenu? resolvedTool;
  if (isCropTool(tool)) {
    resolvedTool = _resolveCropTool(tool);
  } else if (isRotateTool(tool)) {
    resolvedTool = _resolveRotateTool(tool);
  } else if (tool == EditToolsMenu.text) {
    resolvedTool = isToolEnabled(tool) ? tool : null;
  } else {
    resolvedTool = tool;
  }

  if (resolvedTool == null) {
    return; // 所请求的工具被禁用
  }

  if (_activeTool == resolvedTool) {
    // 如果重复点击同一个工具，则关闭它
    cancelCurrentTool();
    return;
  }
  _activeTool = resolvedTool;
  // 进入工具时，备份当前状态以便取消
  if (isCroppingActive) {
    _backupCropRect = _cropRect; // 备份当前裁剪框
    _initializeCropRect(aspectRatio: _getCurrentAspectRatio());
  } else {
    _cropRect = null; // 确保非裁剪模式下没有裁剪框
  }
  if (isRotateTool(_activeTool)) {
    _backupRotationAngle = _currentRotationAngle; // 备份当前旋转角度
  }
  notifyListeners();
}