ACE3/addons/maptools/functions/fnc_handleMouseButton.sqf

/*
 * Author: esteldunedain
 * Handle mouse buttons.
 *
 * Argument:
 * 0: 1 if mouse down down, 0 if mouse button up (Number)
 * 1: Parameters of the mouse button event
 *
 * Return value:
 * Boolean, true if event was handled
 */
#include "script_component.hpp"

params ["_dir", "_params"];
_params params ["_control", "_button", "_screenPosX", "_screenPosY", "_shiftKey", "_ctrlKey", "_altKey"];
TRACE_2("params",_dir,_params);

private _handled = false;

// If it's not a left button event, exit
if (_button != 0) exitWith {_handled};

// If releasing
if (_dir != 1) then {
    if (GVAR(mapTool_isDragging) || GVAR(mapTool_isRotating)) then {
        GVAR(mapTool_isDragging) = false;
        GVAR(mapTool_isRotating) = false;
        _handled = true;
    };
} else {
    // If clicking
    if !(call FUNC(canUseMapTools)) exitWith {};

    // Transform mouse screen position to coordinates
    private _pos = _control ctrlMapScreenToWorld [_screenPosX, _screenPosY];
    _pos set [count _pos, 0];

    GVAR(mapTool_isDragging) = false;
    GVAR(mapTool_isRotating) = false;

    // If no map tool marker then exit
    if (GVAR(mapTool_Shown) == 0) exitWith {};

    // Check if clicking the maptool
    if (_pos call FUNC(isInsideMapTool)) exitWith {
        // Store data for dragging
        GVAR(mapTool_startPos) = + GVAR(mapTool_pos);
        GVAR(mapTool_startDragPos) = + _pos;
        if (_altKey) then {
            // Store data for rotating
            GVAR(mapTool_startAngle) = + GVAR(mapTool_angle);
            GVAR(mapTool_startDragAngle) = (180 + ((GVAR(mapTool_startDragPos) select 0) - (GVAR(mapTool_startPos) select 0)) atan2 ((GVAR(mapTool_startDragPos) select 1) - (GVAR(mapTool_startPos) select 1)) mod 360);
            // Start rotating
            GVAR(mapTool_isRotating) = true;
        } else {
            // Start dragging
            GVAR(mapTool_isDragging) = true;
        };
        _handled = true;
    };
};

_handled