1
我想讓一個名稱爲mainImage的對象作爲背景圖像,當用戶嘗試使用「sendBackwards」時,沒有其他對象可以傳遞它。方法。sendBackwards不會通過某個對象(fabricjs)
所以,在我的思想,我需要知道
1.If the mainImage is at index 0
2.If active selected object is at index 1 when I should not allow to use sendBackwards
這是我嘗試過,到目前爲止,但我猜你將能夠看到,這是失敗的:
$scope.getActiveIndex = function() {
for (var i = 0; i < canvas.fabric._objects.length; i++) {
console.log("not active");
if (canvas.fabric._objects[i].status === "active") {
console.log("active");
return i;
}
}
}
$scope.sendBackwards = function() {
var currentObject = canvas.fabric.getActiveObject();
for (var i = 0; i < canvas.fabric._objects.length; i++) {
console.log($scope.getActiveIndex());
if (canvas.fabric._objects[i].name === "mainImage" && $scope.getActiveIndex() == 1) {
console.log("Can not pass the background");
return;
} else {
canvas.fabric.sendBackwards(currentObject);
}
}
canvas.fabric.renderAll();
};
謝謝。