C# WPF布局绑定
我为这篇文章的篇幅感到抱歉,但这篇文章让我连续两天感到厌烦。考虑下面的图像。在一个瓷砖1-4上的MouScLLIK瓷砖调整大小和大瓦片5出现在中间。另一个鼠标单击可反转此过程。 首先,我尝试直接绑定行和列定义的width/height属性。这根本不起作用。当前解决方案使用标签的宽度和高度属性来完成大小调整。代码如下 XAML:C# WPF布局绑定,c#,wpf,layout,binding,C#,Wpf,Layout,Binding,我为这篇文章的篇幅感到抱歉,但这篇文章让我连续两天感到厌烦。考虑下面的图像。在一个瓷砖1-4上的MouScLLIK瓷砖调整大小和大瓦片5出现在中间。另一个鼠标单击可反转此过程。 首先,我尝试直接绑定行和列定义的width/height属性。这根本不起作用。当前解决方案使用标签的宽度和高度属性来完成大小调整。代码如下 XAML: .... <Grid Name ="MainGrid" Background="Crimson"> <Grid.ColumnDefinitio
....
<Grid Name ="MainGrid" Background="Crimson">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid Name="LeftGrid" Grid.Column ="0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1"/>
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="1"/>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<Label Grid.Column ="1" Grid.Row ="0" Background ="Cyan " Width="200" Name="HandleLeftTop" />
<Label Grid.Column ="0" Grid.Row ="1" Background ="Cyan " Width="200" Name="HandleLeftSideTop" />
<Label Grid.Column ="0" Grid.Row ="2" Background ="Cyan " Width="200" Name="HandleLeftSideBottom"/>
<Grid Grid.Column ="1" Grid.Row ="1" Background ="Green" MouseDown="Grid_MouseDown"> </Grid>
<Grid Grid.Column ="1" Grid.Row ="2" Background ="Yellow" MouseDown="Grid_MouseDown_1"></Grid>
</Grid>
<Grid Name="RightGrid" Grid.Column ="2">
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition Width="1"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="1"/>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<Label Grid.Column ="0" Grid.Row ="0" Background ="Cyan " Width="200" Name="HandleRightTop"/>
<Label Grid.Column ="1" Grid.Row ="1" Background ="Cyan " Width="200" Name="HandleRightSideTop"/>
<Label Grid.Column ="1" Grid.Row ="2" Background ="Cyan " Width="200" Name="HandleRightSideBottom"/>
<Grid Grid.Column ="0" Grid.Row ="1" Background ="Thistle " MouseDown="Grid_MouseDown_2"></Grid>
<Grid Grid.Column ="0" Grid.Row ="2" Background ="Tan " MouseDown="Grid_MouseDown_3"></Grid>
</Grid>
<Grid Name="MiddleGrid" Grid.Column ="1">
<Grid.RowDefinitions>
<RowDefinition Height="1"/>
<RowDefinition />
</Grid.RowDefinitions>
<Label Grid.Row ="0" Background ="Cyan " Width="200" Name="HandleMiddleTop" />
<Grid Grid.Column ="0" Grid.Row ="1" Background ="Tomato"/>
</Grid>
</Grid>
public partial class RTGraphControl : UserControl
{
private readonly RTGraphControlViewModel _viewModel;
public RTGraphControl()
{
InitializeComponent();
_viewModel = new RTGraphControlViewModel(this);
DataContext = _viewModel;
//.... Binding row heights etc...
var leftColumnWidthbindingElement = new Binding
{
Source = _viewModel,
Path = new PropertyPath("LeftColumnWidth"),
Mode = BindingMode.OneWay,
UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
};
HandleLeftTop.SetBinding(WidthProperty, leftColumnWidthbindingElement);
// same for right and middle column
_viewModel.Expanded = false;
}
}
public class RTGraphControlViewModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private readonly RTGraphControl _rt;
private bool _expanded;
private double _rowHeight;
private double _leftcolumnWidth;
private double _middlecolumnWidth;
private double _rightcolumnWidth;
public RTGraphControlViewModel(RTGraphControl rt)
{
_rt = rt;
}
public bool Expanded
{
get { return _expanded; }
set
{
_expanded = value;
double width = _rt.MainGrid.ActualWidth;
if (_expanded)
{
LeftColumnWidth = width*0.2;
RightColumnwidth = width*0.2;
MiddleColumnWidth = width*0.6;
}
else
{
LeftColumnWidth = width * 0.5;
RightColumnwidth = width * 0.5;
MiddleColumnWidth = width * 0;
}
OnPropertyChanged("Expanded");
}
}
public double LeftColumnWidth
{
get { return _leftcolumnWidth; }
set
{
_leftcolumnWidth = value;
OnPropertyChanged("LeftColumnWidth");
}
}
public double MiddleColumnWidth {...}
public double RightColumnwidth {...}
private void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
这种方法适用于左栏和中栏,但有趣的是,它不适用于右栏。右边的列根本不会改变其宽度。另一个问题是,在初始化usercontrol之后,actualwidth设置为0。使用.Measure和.Arrange的变通方法无效
提前谢谢
Jon您可以这样定义XAML:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<Grid Grid.Column="0" Grid.Row="0" Background="ForestGreen" Margin="2"
MouseDown="OuterContainer_OnMouseDown" />
<Grid Grid.Column="2" Grid.Row="0" Background="LimeGreen" Margin="2"
MouseDown="OuterContainer_OnMouseDown" />
<Grid Grid.Column="0" Grid.Row="1" Background="Firebrick" Margin="2"
MouseDown="OuterContainer_OnMouseDown" />
<Grid Grid.Column="2" Grid.Row="1" Background="OrangeRed" Margin="2"
MouseDown="OuterContainer_OnMouseDown" />
<Grid Grid.Column="1" Grid.Row="0" Grid.RowSpan="2" Background="DodgerBlue"
MouseDown="MiddleContainer_OnMouseDown" x:Name="MiddleContainer"
Visibility="Collapsed" Width="300" Margin="2" />
</Grid>
隐藏的:
显示:
唯一需要注意的是,中间框的预设大小(300,但您可以更改),而不是60%。不确定您打算用它做什么,所以这可能是一个问题,也可能不是问题。我本来打算建议一个定制的
面板,但显然不起作用:(非常感谢。非常简单的解决方案,但经过一些调整后可以按预期工作。
private void OuterContainer_OnMouseDown(object sender, MouseButtonEventArgs e)
{
MiddleContainer.Visibility = Visibility.Visible;
}
private void MiddleContainer_OnMouseDown(object sender, MouseButtonEventArgs e)
{
MiddleContainer.Visibility = Visibility.Collapsed;
}