calculateInteractiveButtonScaleRotate method

dynamic calculateInteractiveButtonScaleRotate({ required double editorScaleFactor, required Offset editorScaleOffset, required ProImageEditorConfigs configs, required ScaleUpdateDetails details, required Layer activeLayer, required Size editorSize, required bool configEnabledHitVibration, required ThemeLayerInteraction layerTheme, })

Calculates scaling and rotation based on user interactions.

Implementation

calculateInteractiveButtonScaleRotate({
  required double editorScaleFactor,
  required Offset editorScaleOffset,
  required ProImageEditorConfigs configs,
  required ScaleUpdateDetails details,
  required Layer activeLayer,
  required Size editorSize,
  required bool configEnabledHitVibration,
  required ThemeLayerInteraction layerTheme,
}) {
  Offset layerOffset = Offset(
    activeLayer.offset.dx,
    activeLayer.offset.dy,
  );
  Size activeSize = rotateScaleLayerSizeHelper!;

  double realDx =
      (details.focalPoint.dx - editorScaleOffset.dx) / editorScaleFactor;

  double realDy =
      (details.focalPoint.dy - editorScaleOffset.dy) / editorScaleFactor;

  Offset touchPositionFromCenter = Offset(
        realDx - editorSize.width / 2,
        realDy - editorSize.height / 2,
      ) -
      layerOffset;

  touchPositionFromCenter = Offset(
    touchPositionFromCenter.dx * (activeLayer.flipX ? -1 : 1),
    touchPositionFromCenter.dy * (activeLayer.flipY ? -1 : 1),
  );

  double newDistance = touchPositionFromCenter.distance;

  double margin = layerTheme.buttonRadius + layerTheme.strokeWidth * 2;
  var realSize = Offset(
        activeSize.width / 2 - margin,
        activeSize.height / 2 - margin,
      ) /
      rotateScaleLayerScaleHelper!;

  activeLayer.scale = newDistance / realSize.distance;
  _setMinMaxScaleFactor(configs, activeLayer);
  activeLayer.rotation =
      touchPositionFromCenter.direction - atan(1 / activeSize.aspectRatio);

  if (editorScaleFactor > 1) return;
  checkRotationLine(
    activeLayer: activeLayer,
    editorSize: editorSize,
    configEnabledHitVibration: configEnabledHitVibration,
  );
}