MiddleMouseDown

void MiddleMouseDown(string control)
void MiddleMouseDown(string control, float x, float y)

Description
Simulates pressing and holding the middle mouse button (mouse wheel button) over a control.
Does not release until MiddleMouseUp is called.
Optionally, relative coordinates x and y (values between 0.0 and 1.0) can be provided to press at a specific position within the control's bounding rectangle.
If omitted, the press is performed at the center of the control.

Parameters
- control - Identifier of the UI control.
- x (optional) - Relative horizontal position within the control (0.0 = left, 1.0 = right). Default: 0.5 (center).
- y (optional) - Relative vertical position within the control (0.0 = top, 1.0 = bottom). Default: 0.5 (center).

Returns
- none

Example
void main()
{
    MiddleMouseDown("MAP_CANVAS");
    // ... drag view
    MiddleMouseUp("MAP_CANVAS");

    MiddleMouseDown("MAP_CANVAS", 0.3, 0.3); // Press at 30% from left and top
}