arcgis for javascript4.x 屏蔽掉地图的默认事件及默认控件

屏蔽地图默认事件

原理是通过设置view的监听，然后在相应事件触发时候阻止事件冒泡，我们可以添加一个内部状态curentState来设置是否启用禁止默认事件效果。

//禁止默认事件
DisableInteraction(view) {
  let curentState = true; //禁止通过键盘+-缩放地图

  view.on("key-down", function (event) {
    var prohibitedKeys = ["+", "-", "Shift", "_", "="];
    var keyPressed = event.key;

    if (prohibitedKeys.indexOf(keyPressed) !== -1) {
      if (curentState) event.stopPropagation();
    }
  }); //禁止滚轮缩放地图

  view.on("mouse-wheel", function (event) {
    if (curentState) {
      event.stopPropagation();
    }
  }); //禁止双击放大

  view.on("double-click", function (event) {
    if (curentState) event.stopPropagation();
  }); //禁止Ctrl+双击缩小

  view.on("double-click", ["Control"], function (event) {
    if (curentState) event.stopPropagation();
  }); //禁止移动地图

  view.on("drag", function (event) {
    if (curentState) event.stopPropagation();
  }); // 禁止通过上下左右箭头移动地图

  view.on("key-down", function (event) {
    // prevents panning with the arrow keys

    var keyPressed = event.key;

    if (keyPressed.slice(0, 5) === "Arrow") {
      if (curentState) event.stopPropagation();
    }
  }); //禁止Shift+拖拽拉框放大

  view.on("drag", ["Shift"], function (event) {
    if (curentState) event.stopPropagation();
  }); //禁止Shift+Ctrl+拖拽拉框缩小

  view.on("drag", ["Shift", "Control"], function (event) {
    if (curentState) event.stopPropagation();
  });

  return function (state) {
    curentState = state;
};