handleMouseEvent method

void handleMouseEvent(MouseEvent event, int localX, int localY, Rect area,)

Handles mouse events for dragging the slider thumb.

Implementation

void handleMouseEvent(MouseEvent event, int localX, int localY, Rect area) {
  if (event.type != MouseEventType.press &&
      event.type != MouseEventType.drag) {
    return;
  }

  if (axis == SliderAxis.horizontal) {
    if (localY != 0) return;
    final trackLength = area.width;
    if (trackLength <= 1) return;

    final percent = (localX / (trackLength - 1)).clamp(0.0, 1.0);
    value = min + percent * (max - min);
    onChanged?.call(value);
  } else {
    if (localX != 0) return;
    final trackLength = area.height;
    if (trackLength <= 1) return;

    // For vertical slider, top (y=0) is max, bottom (y=height-1) is min
    final percent = 1.0 - (localY / (trackLength - 1)).clamp(0.0, 1.0);
    value = min + percent * (max - min);
    onChanged?.call(value);
  }
}