All,
I have a WPF datagrid in which there is a template column defined as follows:
<DataGridTemplateColumn Width="105">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" Height="35">
<Button Style="{StaticResource tableButtonStyle}">
<ContentControl/>
</Button>
</StackPanel>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
The button style (which only displays the button when the user moves the mouse over a specific data grid row) is as follows:
<!-- Disappearing button for tables -->
<Style x:Key="tableButtonStyle" TargetType="Button" BasedOn="{StaticResource {x:Static ToolBar.ButtonStyleKey}}">
<Setter Property="Visibility" Value="Collapsed"/>
<Style.Triggers>
<DataTrigger Binding="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type DataGridRow}},Path=IsMouseOver}" Value="True">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
I would like to animate the height of the datagrid so that it is 'X' units high when the buttons are hidden, or 'Y' units high when the buttons are displayed. Can this be achieved in the xaml markup?
Thanks in advance!
I don't know if there's a way to do that in XAML(I don't know it because i'm new to xaml).
But what I would do that with code-behind. I would use a fancy animation, something like:
private Storyboard sb=new StoryBoard();
private DoubleAnimation da=new DoubleAnimation();
da.From=datagrid.actualHeight;
da.to=x;
da.Duration = new Duration(TimeSpan.FromSeconds(0.5));
Storyboard.SetTargetProperty(da, new PropertyPath(yourDatagrid.HeigthProperty));
sb.Children.Add(da);
yourDatagrid.BeginStoryboard(sb);
and maybe you can get this inside a ClickEvent.
Hope this help!
Related
I know it is possible to do this by working with ICommand, but since this is the only place in my whole project where this is needed, I am asking myself, if there is maybe a better solution than implementing RelayCommand and ICommand and an additional method in my otherwise property-only class?
Maybe my scenario may help here:
I have a ListView which is bound to a list of properties (this is a custom-class I made to display those).
I have a button in eacht row of entries, that I want to set the "IsToDelete"-Property to true.
If "IsToDelete" is true, all the controls I show in my ListView will collapse.
The whole logic is up to this point in DataTemplates, the one for my button looks like this:
<DataTemplate x:Key="DeleteButtonTemplate">
<Button Name="bt_Delete"
Command="{Binding RelativeSource={RelativeSource AncestorType=ListView}, Path=ItemSource.DeleteClicked}">
<Image Height="16" Width="16" Source="Images\RecycleBin\VSO_RecycleBin_16x.png"/>
<Button.Style>
<Style TargetType="{x:Type Button}">
<Style.Triggers>
<DataTrigger Binding="{Binding IsToDelete}" Value="True">
<Setter Property="Visibility" Value="Collapsed"/>
</DataTrigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
</DataTemplate>
Note the command in this DataTemplate is currently not working as intended, that is why I even got to the question ;)
In the optimal case I'd just have to do something like:
<Setter Property="{Binding IsToDelete}" Value="True"/>
So, is there a way to solve it like this or at least in a less complicated way than ICommand with RelayCommand?
why not use ToggleButton and bind IsChecked property to IsToDelete property of a viewModel?
simplified example with ItemsControl
<ItemsControl>
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<ToggleButton Content="X" IsChecked="{Binding Path=IsToDelete}"/>
<Border Width="100"
Background="MediumPurple"
Margin="5">
<Border.Style>
<Style TargetType="Border">
<Setter Property="Visibility" Value="Visible"/>
<Style.Triggers>
<DataTrigger Binding="{Binding Path=IsToDelete}" Value="True">
<Setter Property="Visibility" Value="Collapsed"/>
</DataTrigger>
</Style.Triggers>
</Style>
</Border.Style>
</Border>
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
You could use the Click eventhandler of the Button. Then you don't need any Commands.
private void bt_Delete_Click(object sender, RoutedEventArgs e)
{
var btn = sender as Button;
YourClass dc = btn.DataContext as YourClass;
dc.IsToDelete = true;
}
I don't really like this solution, but I think, it would work.
I am using the Xceed datagrid for WPF. Today I was trying to change the background of the whole row if one of its column "SA" has the some value or not null. I wrote the following piece of code in XAML with a converter function in code behind:
<xcdg:DataGridControl.Resources>
<Style TargetType="{x:Type xcdg:DataRow}">
<Style.Triggers>
<DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Converter={StaticResource newConverter}, Path=Cells[SA].Content}" Value="True">
<Setter Property="Background" Value="LightGreen" />
</DataTrigger>
</Style.Triggers>
</Style>
</xcdg:DataGridControl.Resources>
To my surprise, as soon as I load the grid for the first time, the data in the SA column is nowhere to be seen. However, once I scroll down a bit, till the point that row which is supposed to have data for the column is not visible, and then when I scroll up again to see that row, I can see the value in that column as well as the background changed.
What am I doing wrong?
Use simple binding and avoid converter/template
<TextBlock Text="{Binding}"></TextBlock>
To fill color in your column use this or the following code:
<xcdg:Column Title="Unit Price" FieldName="UnitPrice" ReadOnly="True">
<xcdg:Column.CellContentTemplate>
<DataTemplate>
<DockPanel LastChildFill="false" x:Name="UnitPrice">
<TextBlock Text="{Binding}"></TextBlock>
<Image x:Name="img" Width="16" Height="16" DockPanel.Dock="Right"
Margin="2,0,0,0" Visibility="Collapsed"
ToolTip="Unit Price is Undefined." VerticalAlignment="Center"
HorizontalAlignment="Left" />
</DockPanel>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding}" Value="0.00">
<Setter TargetName="img" Property="Visibility" Value="Visible" />
<Setter TargetName="UnitPrice" Property="Background" Value="Pink" />
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
</xcdg:Column.CellContentTemplate>
</xcdg:Column>
I have an expander...and a textbox. The textbox is hidden by default. when user click on the expander, I am displaying the text box. This is working fine.
What I need is, when user click on the expander...I need to set the focus in the textbox.
Please help me to do this...I tried with following code...but it seems "IsFocused" is readonly property.
Any help would be appreciated !
<StackPanel>
<DockPanel>
<TextBlock DockPanel.Dock="Left" Text="ID"/>
<Expander x:Name="ID" DockPanel.Dock="Right" IsExpanded="False" ExpandDirection="Down">
</Expander>
</DockPanel>
<TextBox Text="{Binding Path=SearchCCCId.Value,UpdateSourceTrigger=PropertyChanged}"
Visibility="{Binding ElementName=ID,Path=IsExpanded,Converter={x:Static local:Converters.BoolToVisibility}}" Width="70" >
<TextBox.Style>
<Style>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=ID, Path=IsEpanded}" Value="True" >
<Setter Property="IsFocused" Value="True" />
</DataTrigger>
</Style.Triggers>
</Style>
</TextBox.Style>
</TextBox>
</StackPanel>
With all your help, I am able to find out the answer...
<TextBox.Style>
<Style>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=ID, Path=IsExpanded}" Value="True">
<Setter Property="FocusManager.FocusedElement"
Value="{Binding ElementName=PropertyIDSearch}"/>
</DataTrigger>
</Style.Triggers>
</Style>
</TextBox.Style>
IsFocused is ReadOnly property. You may want to look at these -
How to set focus to textbox using MVVM?
WPF - Set Focus when a button is clicked - No Code Behind
You can handler Expanded event of Expander and set focus inside handler method.
private void OnExpanderExpanded(object sender, RoutedEventArgs args)
{
txtTest.Focus();
}
I'm using a the WPF datagrid from the Microsoft CodePlex project. I have a custom control that I want to databind to a field from the row of the datagrid. I can't for the life of me figure out how to specify a tooltip on a datagrid row.
The closest I've come is to use a RowStyle with a Setter to set the tooltip, but this only seems to work for text. When I try to put a ControlTempalte in as the Value for the ToolTip, it displays the result of calling ToString on the ControlTemplate type.
I think I need to set the "Template" property of the ToolTip, but I can't seem to figure out how to do that...
<dg:DataGrid Name="dgResults" AutoGenerateColumns="True">
<dg:DataGrid.RowStyle >
<Style TargetType="{x:Type dg:DataGridRow}">
<Setter Property="ToolTip" >
<Setter.Value>
<ControlTemplate TargetType="{x:Type ToolTip}">
<StackPanel>
<TextBlock>txt1</TextBlock><TextBlock>txt2</TextBlock>
</StackPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</dg:DataGrid.RowStyle>
</dg:DataGrid>
Figured it out... took me about 6 hours...
For some reason, I can't set the value directly using Value.Setter. If I define the content for the tooltip as a static resource though, and then set it in the Style property of the DataGrid.RowStyle it works.
So, the datagrid row style looks like:
<Style TargetType="{x:Type dg:DataGridRow}">
<Setter Property="ToolTip" Value="{StaticResource resKWIC}">
</Setter>
</Style>
</dg:DataGrid.RowStyle>
And the resource is
<Window.Resources>
<StackPanel x:Key="resKWIC">
<TextBlock>f1</TextBlock>
<TextBlock>f2></TextBlock>
</StackPanel>
</Window.Resources>
Thanks!
The key is to use the Property ToolTipService.ToolTip, instead of ToolTip - like this:
<Setter Property="ToolTipService.ToolTip" Value="My Tooltip"/>
I also got this working with a couple of changes; included incase it helps someone.
My Datadrid is bound to a list of custom objects, I wanted to display the string "Name" as a column and the string "text" in the tooltip. The trick for me (newbe) was that I had to include the Text Column and hide it for it to show up in the tooltip, i.e.:
<DataGrid AutoGenerateColumns="False" CanUserAddRows="False" EnableRowVirtualization="False" HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch" IsReadOnly="True" IsSynchronizedWithCurrentItem="True" ItemsSource="{Binding}" Name="dgrTextGroupText" VerticalContentAlignment="Stretch" Grid.Column="3" Grid.Row="1" Grid.RowSpan="6" CanUserReorderColumns="False" CanUserSortColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Name}" Width="*" />
<DataGridTextColumn Binding="{Binding Text}" Width="0" Visibility="Hidden" />
</DataGrid.Columns>
<DataGrid.RowStyle>
<Style TargetType="{x:Type DataGridRow}">
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="ToolTip" Value="{Binding RelativeSource={RelativeSource Self}, Path=DataContext.text}" />
</Trigger>
</Style.Triggers>
</Style>
</DataGrid.RowStyle>
</DataGrid>
Not sure you can do it through XAML.
A easier way might be to just handle the LoadingRow event. In xaml have something like:
<dg:DataGrid Name="dgResults" AutoGenerateColumns="True"
LoadingRow="dgResults_LoadingRow"
ItemsSource="{Binding ListOfStrings}" />
Then in code behind
void dgResults_LoadingRow(object sender, DataGridRowEventArgs e)
{
DataGridRow row = e.Row;
row.ToolTip = row.DataContext as string;
}
Obviously you will have to change the code depending on how you are populating the data in the datagrid. This is also untested =)
I needed to set the tooltip dynamically based on the cell content. I'm using the tooltip to display text overflow text from the cell. The binding below is from a c# class property named CellText. Thanks to the posts above for allowing me to avoid figuring out the entire thing myself.
<DataGridTextColumn Header="HeaderText" Binding="{Binding DisplayText, Mode=OneWay}" Width="33*">
<DataGridTextColumn.CellStyle>
<Style>
<Setter Property="ToolTipService.ToolTip" Value="{Binding DisplayText, Mode=OneWay}"/>
</Style>
</DataGridTextColumn.CellStyle>
</DataGridTextColumn>
There's no need for the ControlTemplate. If you want the StackPanel in the ToolTip, just set it as:
<Setter Property="ToolTip">
<Setter.Value>
<StackPanel>
<TextBlock>txt1</TextBlock><TextBlock>txt2</TextBlock>
</StackPanel>
</Setter.Value>
</Setter>
I have expanders that contain text boxes, the text boxes use the wpf validation stuff to draw a red box around them ( text boxes are wrapped in Adorner Decorators to make sure I don't get empty red boxes everywhere when the expanders are collapsed)
I want to indicate in the header of the expander that it has contents that have errors (in case it is in a collapsed state) - an icon or red exclamation mark or something. I think I see a way to do this in code from my validation function (not ideal) but is there a way to do it in xaml? Can I use a style for the expander with a trigger somehow pointing to the Validation.HasError of all children?
thanks for any thoughts..
Trev
If you know the contents of your expander, you can use a MultiDataTrigger to do this:
<Expander>
<Expander.Header>
<TextBlock>
<TextBlock.Style>
<Style TargetType="{x:Type TextBlock}">
<Setter Property="Text" Value="ERROR"/>
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding ElementName=txtWidth, Path=(Validation.HasError)}" Value="False"/>
<Condition Binding="{Binding ElementName=txtHeight, Path=(Validation.HasError)}" Value="False"/>
</MultiDataTrigger.Conditions>
<Setter Property="Text" Value="NO ERROR"/>
</MultiDataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
</Expander.Header>
<StackPanel>
<TextBox x:Name="txtWidth" Text="{Binding Width, ElementName=rect, UpdateSourceTrigger=PropertyChanged, ValidatesOnExceptions=True}"/>
<TextBox x:Name="txtHeight" Text="{Binding Height, ElementName=rect, UpdateSourceTrigger=PropertyChanged, ValidatesOnExceptions=True}"/>
<Rectangle x:Name="rect" Width="100" Height="100" Margin="10" Fill="Green"/>
</StackPanel>
</Expander>
If the contents of the expander aren't known, then you'll probably have to set Binding.NotifyOnValidationError on the TextBoxes and handle the Error attached event.