更改MapControl中的重叠顺序
更改MapControl中的重叠顺序
提问于 2016-09-28 11:13:31
我需要向MapControl添加一些元素，例如：
<Maps:MapControl HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Loaded="MapControl_Loaded" x:Name="mymap">
<Rectangle x:Name="r1" Width="100" Height="100" Fill="Red"/>
<Rectangle x:Name="r2" Width="20" Height="20" Fill="Green"/>
<Rectangle x:Name="r3" Width="20" Height="20" Fill="Blue"/>
<Rectangle x:Name="r4" Width="20" Height="20" Fill="Yellow"/>
<Rectangle x:Name="r5" Width="20" Height="20" Fill="Purple"/>
</Maps:MapControl>我通过代码设置矩形的位置：
MapControl.SetLocation(r1, new Geopoint(new BasicGeoposition() {
Latitude = 45.6593049969524,
Longitude = 8.97672694176435
}));
MapControl.SetNormalizedAnchorPoint(r1, new Point(0.5, 0.5));
MapControl.SetLocation(r2, new Geopoint(new BasicGeoposition()
{
Latitude = 45.6592821981758,
Longitude = 8.97627767175436
}));
MapControl.SetNormalizedAnchorPoint(r2, new Point(0.5, 0.5));
MapControl.SetLocation(r3, new Geopoint(new BasicGeoposition()
{
Latitude = 45.6589662004262,
Longitude = 8.97650314494967
}));
MapControl.SetNormalizedAnchorPoint(r3, new Point(0.5, 0.5));
MapControl.SetLocation(r4, new Geopoint(new BasicGeoposition()
{
Latitude = 45.6604913715273,
Longitude = 8.97657556459308
}));
MapControl.SetNormalizedAnchorPoint(r4, new Point(0.5, 0.5));
MapControl.SetLocation(r5, new Geopoint(new BasicGeoposition()
{
Latitude = 45.6580915488303,
Longitude = 8.97816779091954
}));矩形从第一个( r1 )呈现到最后一个( r5 )，因此r5与其他矩形重叠，r4重叠r3、r2、r1等。
现在我需要添加另一个矩形( r6 )，但是我希望r6在r1下面：
Rectangle r6 = new Rectangle();
r6.Width = 70;
r6.Height = 70;
r6.Fill = new SolidColorBrush(Colors.Coral);
mymap.Children.Insert(0, r6);
MapControl.SetLocation(r6, new Geopoint(new BasicGeoposition()
{
Latitude = 45.6594054121524,
Longitude = 8.97751081734896
}));
MapControl.SetNormalizedAnchorPoint(r6, new Point(0.5, 0.5));我使用"mymap.Children.Insert(0，r6 )“代替"Children.Add”将r6放在第一位置，但它不起作用，它的呈现方式就好像它是最后一个元素。
我试着使用Canvas.SetZIndex，但它在MapControl上不起作用。
因此，问题是，如何将r6添加到MapControl并将其呈现为第一个元素？
回答 1
Stack Overflow用户
回答已采纳
发布于 2016-09-29 08:26:58
呈现顺序取决于何时将控件添加到MapControl。虽然您在第一个位置插入了矩形(R6)，但是它最后被添加了，所以它首先呈现出来。要更改MapControl中XAML控件的呈现顺序，我们需要删除MapControl.Children中的所有控件，并按照正确的顺序重新添加它们，如下所示：
private void myMap_Loaded(object sender, RoutedEventArgs e)
{
//create a list to save the controls already in MapControl
var originalChildren = new List<DependencyObject>();
originalChildren = myMap.Children.ToList();
//clear the controls
myMap.Children.Clear();
Rectangle r6 = new Rectangle();
r6.Width = 70;
r6.Height = 70;
r6.Fill = new SolidColorBrush(Colors.Coral);
//re-add into MapControl
originalChildren.Insert(0, r6);
foreach (var item in originalChildren)
{
myMap.Children.Add(item);
}
MapControl.SetLocation(r1, new Geopoint(new BasicGeoposition()
{
Latitude = 45.6593049969524,
Longitude = 8.97672694176435
}));
MapControl.SetNormalizedAnchorPoint(r1, new Point(0.5, 0.5));
MapControl.SetLocation(r2, new Geopoint(new BasicGeoposition()
{
Latitude = 45.6592821981758,
Longitude = 8.97627767175436
}));
MapControl.SetNormalizedAnchorPoint(r2, new Point(0.5, 0.5));
MapControl.SetLocation(r3, new Geopoint(new BasicGeoposition()
{
Latitude = 45.6589662004262,
Longitude = 8.97650314494967
}));
MapControl.SetNormalizedAnchorPoint(r3, new Point(0.5, 0.5));
MapControl.SetLocation(r4, new Geopoint(new BasicGeoposition()
{
Latitude = 45.6604913715273,
Longitude = 8.97657556459308
}));
MapControl.SetNormalizedAnchorPoint(r4, new Point(0.5, 0.5));
MapControl.SetLocation(r5, new Geopoint(new BasicGeoposition()
{
Latitude = 45.6580915488303,
Longitude = 8.97816779091954
}));
MapControl.SetLocation(r6, new Geopoint(new BasicGeoposition()
{
Latitude = 45.6594054121524,
Longitude = 8.97751081734896
}));
MapControl.SetNormalizedAnchorPoint(r6, new Point(0.5, 0.5));
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/39745832
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