IVisualElement  - AS3 Flex

指出所指定物件的 Alpha 透明度值。 有效值是 0 (完全透明) 到 1 (完全不透明)。 預設值為 1。alpha 設為 0 的顯示物件「都是」作用中的狀態，即使看不見它們亦然。

Determines the order in which items inside of containers are rendered. Spark containers order their items based on their depth property, with the lowest depth in the back, and the higher in the front. Items with the same depth value appear in the order they are added to the container.

預設值為 0。

Specifies the optional DesignLayer instance associated with this visual element.

When a DesignLayer is assigned, a visual element must consider the visibility and alpha of its parent layer when ultimately committing its own effective visibility or alpha to its backing DisplayObject (if applicable).

A visual element must listen for layerPropertyChange notifications from the associated layer parent. When the effectiveAlpha or effectiveVisibility of the layer changes, the element must then compute its own effective visibility (or alpha) and apply it accordingly.

This property should not be set within MXML directly.

The designLayer property is not used for z-order control, please see depth.

預設值為 null。

相關 API 元素

會指出顯示物件的高度，以像素為單位。此高度是根據顯示物件內容的範圍計算而得。 當您設定 height 屬性時，scaleY 屬性也會相應調整，如下列程式碼所示：

    var rect:Shape = new Shape();
    rect.graphics.beginFill(0xFF0000);
    rect.graphics.drawRect(0, 0, 100, 100);
    trace(rect.scaleY) // 1;
    rect.height = 200;
    trace(rect.scaleY) // 2;

除了 TextField 和 Video 物件，無內容的顯示物件 (例如，空的 Sprite) 的高度為 0，即使您嘗試將 height 設定為其它值也是如此。

Contains true when the element is in 3D. The element can be in 3D either because it has 3D transform properties or it has 3D post layout transform offsets or both.

相關 API 元素

The owner of this IVisualElement object. By default, it is the parent of this IVisualElement object. However, if this IVisualElement object is a child component that is popped up by its parent, such as the drop-down list of a ComboBox control, the owner is the component that popped up this IVisualElement object.

This property is not managed by Flex, but by each component. Therefore, if you use the PopUpManger.createPopUp() or PopUpManger.addPopUp() method to pop up a child component, you should set the owner property of the child component to the component that popped it up.

The default value is the value of the parent property.

The parent container or component for this component. Only visual elements should have a parent property. Non-visual items should use another property to reference the object to which they belong. By convention, non-visual objects use an owner property to reference the object to which they belong.

Defines a set of adjustments that can be applied to the object's transform in a way that is invisible to its parent's layout.

For example, if you want a layout to adjust for an object that is rotated 90 degrees, set the object's rotation property. If you want the layout to not adjust for the object being rotated, set its postLayoutTransformOffsets.rotationZ property.

Controls the visibility of this visual element. If true, the object is visible.

If an object is not visible, but the includeInLayout property is set to true, then the object takes up space in the container, but is invisible.

If visible is set to true, the object may not necessarily be visible due to its size and whether container clipping is enabled.

Setting visible to false, prevents the component from getting focus.

預設值為 true。

相關 API 元素

會指出顯示物件的寬度，以像素為單位。 此寬度是根據顯示物件內容的範圍計算而得。 當您設定 width 屬性時，scaleX 屬性也會相應調整，如下列程式碼所示：

    var rect:Shape = new Shape();
    rect.graphics.beginFill(0xFF0000);
    rect.graphics.drawRect(0, 0, 100, 100);
    trace(rect.scaleX) // 1;
    rect.width = 200;
    trace(rect.scaleX) // 2;

除了 TextField 和 Video 物件，無內容的顯示物件 (例如，空的 Sprite) 的寬度為 0，即使您嘗試將 width 設定為其它值也是如此。

指出 DisplayObject 實體相對於父輩 DisplayObjectContainer 之區域座標的 x 座標。 如果物件位於已經變形的 DisplayObjectContainer 中，就表示位於包含的 DisplayObjectContainer 的區域座標系統中。 因此，對於以逆時針旋轉 90° 的 DisplayObjectContainer 而言，DisplayObjectContainer 子物件會繼承以逆時針旋轉 90° 的座標系統。 物件的座標是指註冊點的位置。

指出 DisplayObject 實體相對於父輩 DisplayObjectContainer 之區域座標的 y 座標。 如果物件位於已經變形的 DisplayObjectContainer 中，就表示位於包含的 DisplayObjectContainer 的區域座標系統中。 因此，對於以逆時針旋轉 90° 的 DisplayObjectContainer 而言，DisplayObjectContainer 子物件會繼承以逆時針旋轉 90° 的座標系統。 物件的座標是指註冊點的位置。