Notifies the instance that the user has started drawing the panoramic polygon.
drawStarted(
item: ImageViewerItem,
x: number,
y: number,
args: InteractiveDragStartedEventArgs
): void;
item
The item where the double-tap took place.
x
The mouse's x-coordinate
y
The mouse's y-coordinate
args
The native interactive arguments
The draw action happens when the user clicks on an image with the mouse button. At that point drawStarted gets fired.
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