WPF Radcalender customization day template format - wpf

I want to cretae wpf radcalender in my wpf mvvm application. I can't able to customize the calender day template. I want to this format.
I am using this code. But the text has been overwrite the date.
xmal:
<telerik:RadCalendar Margin="30" SelectableDateStart="2015-01-01" SelectableDateEnd="2015-01-31" >
<telerik:RadCalendar.DayTemplate>
<DataTemplate>
<StackPanel>
<TextBox Text="Test"/>
</StackPanel>
</DataTemplate>
</telerik:RadCalendar.DayTemplate>
</telerik:RadCalendar>

I've worked with the RadCalendar within a Winrt app and here how i fixed that (with some help from the official Docs)
First add a new converter that will return the Date Label like that:
public class CellModelConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, string language)
{
var cellModel = value as CalendarCellModel;
return cellModel.Label;
}
public object ConvertBack(object value, Type targetType, object parameter, string language)
{
throw new NotImplementedException();
}
}
then in you Xaml add a textBlock to display the Cell Date using the previous converter :
<telerik:RadCalendar Margin="30" SelectableDateStart="2015-01-01" SelectableDateEnd="2015-01-31" >
<telerik:RadCalendar.DayTemplate>
<DataTemplate>
<StackPanel>
<TextBox Text="Test"/>
<TextBlock Text="{Binding Converter={StaticResource CellModelConverter}}" FontSize="13.333" VerticalAlignment="Bottom" Margin="6,0,0,4" />
</StackPanel>
</DataTemplate>
</telerik:RadCalendar.DayTemplate>
</telerik:RadCalendar>
and don't forget to add the Converter to the Static Resources:
<converters:CellModelConverter x:Key="CellModelConverter" />
--EDIT 1
the code above work fine in a Winrt application, for a WPF project you don't need a converter at all :
<telerik:RadCalendar Margin="30" SelectableDateStart="2015-01-01" SelectableDateEnd="2015-01-31" >
<telerik:RadCalendar.DayTemplate>
<DataTemplate>
<StackPanel>
<TextBox Text="Test"/>
<TextBlock Text="{Binding}" FontSize="13.333" VerticalAlignment="Bottom" Margin="6,0,0,4" />
</StackPanel>
</DataTemplate>
</telerik:RadCalendar.DayTemplate>
</telerik:RadCalendar>
--EDIT 2
the above code shows the "test" text in all the cells including WeekName, DayName ..., to fix that you can use either a Converter or a DataTrigger, here how to do it using a DataTrigger :
<telerik:RadCalendar Margin="30" SelectableDateStart="2015-01-01" SelectableDateEnd="2015-01-31" >
<telerik:RadCalendar.DayTemplate>
<DataTemplate>
<StackPanel>
<TextBox Text="Test">
<TextBox.Style>
<Style TargetType="TextBox">
<Setter Property="Visibility" Value="Collapsed"></Setter>
<Style.Triggers>
<DataTrigger Binding="{Binding DataContext.ButtonType,ElementName=tb}"
Value="Date">
<Setter Property="Visibility" Value="Visible" />
</DataTrigger>
</Style.Triggers>
</Style>
</TextBox.Style>
</TextBox>
<TextBlock x:Name="tb" Text="{Binding Converter={StaticResource CellModelConverter}}" FontSize="13.333" VerticalAlignment="Bottom" Margin="6,0,0,4" />
</StackPanel>
</DataTemplate>
</telerik:RadCalendar.DayTemplate>
</telerik:RadCalendar>
Output:

Related

How to check the property value of the singleton(or static) class in the XAML?

There may be expressions that sound rude because I'm not a native English speaker.
I hope you to understand.
I am creating an application supporting the theme.
I would like to change the image in the XAML whenever the theme changes.
Currently, my requirements were implemented by using both cs code and XAML code as below.
<HierarchicalDataTemplate DataType="{x:Type models:SolutionStruct}" ItemsSource="{Binding Projects}">
<StackPanel Orientation="Horizontal">
<Image Source="{Binding Converter={converters:ToImageByThemeConverter}, ConverterParameter='Solution'}" Width="16" Height="16" Margin="0 0 5 0">
</Image>
<TextBlock Text="{Binding Name}"/>
</StackPanel>
</HierarchicalDataTemplate>
The below code is the cs code to convert.
public class ToImageByThemeConverter : MarkupExtension, IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
string result = string.Empty;
if (Theme.ThemeKind == ThemeKind.Dark)
{
if (parameter.ToString() == "Solution") result = "/Resources/solution.png";
else if (parameter.ToString() == "Project") result = "/Resources/project.png";
}
return result;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
public override object ProvideValue(IServiceProvider serviceProvider) => this;
}
The above code works well but I would like to implement the equal functionality by using only XAML code.
I think If I can check the property value of the Theme class then I can solve it.
Here are some of the vague codes that I hit upon to solve this problem. (not operate)
<HierarchicalDataTemplate DataType="{x:Type models:SolutionStruct}" ItemsSource="{Binding Projects}">
<StackPanel Orientation="Horizontal">
<Image Width="16" Height="16" Margin="0 0 5 0">
<Image.Triggers>
<Trigger Binding Source="{Binding {x:Static Theme}, Path="{ThemeKind}"} Value="Dark">
<Setter Source="/Resources/solution_dark.png"/>
</Trigger>
</Triggers>
</Image>
<TextBlock Text="{Binding Name}"/>
</StackPanel>
</HierarchicalDataTemplate>
Of course, the above code does not operate because I design vaguely.
Is it possible to design a code that operates with a similar feel to the above code?
or if you have another way to solve this problem please let me know, I don't obsess my way.
Thank you for reading.
You can bind to static properties by enclosing the property path in parentheses.
Adding the corresponding DataTrigger to the DataTemplate the HierarchicalDataTemplate would become:
<HierarchicalDataTemplate DataType="{x:Type models:SolutionStruct}"
ItemsSource="{Binding Projects}">
<StackPanel Orientation="Horizontal">
<Image x:Name="Image"
Source="/Resources/solution.png" />
<TextBlock Text="{Binding Name}" />
</StackPanel>
<HierarchicalDataTemplate.Triggers>
<DataTrigger Binding="{Binding Path=(Theme.ThemeKind)}" Value="{x:Static ThemeKind.Dark}">
<Setter TargetName="Image" Property="Source" Value="/Resources/solution_dark.png" />
</DataTrigger>
</HierarchicalDataTemplate.Triggers>
</HierarchicalDataTemplate>

Combine design time menu elements into databound menu item binding

Hopefully I got the vernacular right on my question so I don't throw people completely off.
I have a menu that is data bound and using a HierarchicalDataTemplate that handles the various nested types in my binding object. So far everything is working fantastically; but now I would like to add a couple additional menu items to menu items of a certain type, but of course that breaks the binding as I cannot bind to a collection that already contains elements. CompositeCollection seems to be what I am looking for but I keep running into syntax errors when trying to apply that to my HierarchicalDataTemplate.
<Menu.Resources>
<HierarchicalDataTemplate DataType="{x:Type ODIF:PluginContainer}" ItemsSource="{Binding Instance.Devices}">
<HierarchicalDataTemplate.ItemsSource>
<CompositeCollection>
<CollectionContainer Collection="{Binding Instance.Devices}"/>
<MenuItem>One more item!</MenuItem>
<MenuItem>Two more items!</MenuItem>
</CompositeCollection>
</HierarchicalDataTemplate.ItemsSource>
<StackPanel HorizontalAlignment="Left" Orientation="Horizontal">
<Image Source="{Binding PluginIcon}" Width="16" Height="16">
<Image.Style>
<Style TargetType="{x:Type Image}">
<Style.Triggers>
<DataTrigger Binding="{Binding PluginIcon}" Value="{x:Null}">
<Setter Property="Visibility" Value="Collapsed" />
</DataTrigger>
</Style.Triggers>
</Style>
</Image.Style>
</Image>
<TextBlock Text="{Binding PluginName}"/>
</StackPanel>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate DataType="{x:Type ODIF:Device}" ItemsSource="{Binding InputChannels}">
<StackPanel HorizontalAlignment="Left" Orientation="Horizontal">
<Image Source="{Binding StatusIcon}" Width="16" Height="16">
<Image.Style>
<Style TargetType="{x:Type Image}">
<Style.Triggers>
<DataTrigger Binding="{Binding StatusIcon}" Value="{x:Null}">
<Setter Property="Visibility" Value="Collapsed" />
</DataTrigger>
</Style.Triggers>
</Style>
</Image.Style>
</Image>
<TextBlock Text="{Binding DeviceName}"/>
</StackPanel>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate DataType="{x:Type ODIF:DeviceChannel}">
<local:ChannelBox Channel="{Binding}" Width="200" Click="ChannelClicked"/>
</HierarchicalDataTemplate>
</Menu.Resources>
This throws:
The specified value cannot be assigned. The following type was
expected: "BindingBase".
and
Property 'ItemsSource' does not support values of type 'CompositeCollection'.
I guess you have to use a converter for solving your issue.
Let's suppose that MenuModel is a class which represents a menu item. It is really simple:
public class MenuModel
{
private List<MenuModel> children = new List<MenuModel>();
public string Description { get; set; }
public IList Children
{
get
{
return children;
}
}
}
Now we have our XAML:
<Window.Resources>
<collections:ArrayList x:Key="someOtherMenus">
<local:MenuModel Description="Menu A">
<local:MenuModel.Children>
<local:MenuModel Description="SubMenu i" />
<local:MenuModel Description="SubMenu ii" />
</local:MenuModel.Children>
</local:MenuModel>
<local:MenuModel Description="Menu B" />
</collections:ArrayList>
</Window.Resources>
<DockPanel>
<Menu DockPanel.Dock="Top" Margin="3" ItemsSource="{Binding MenuModels}">
<Menu.ItemTemplate>
<HierarchicalDataTemplate>
<HierarchicalDataTemplate.ItemsSource>
<Binding ConverterParameter="someOtherMenus">
<Binding.Converter>
<local:CompositeCollectionConverter />
</Binding.Converter>
</Binding>
</HierarchicalDataTemplate.ItemsSource>
<TextBlock Text="{Binding Description}" Margin="3" />
</HierarchicalDataTemplate>
</Menu.ItemTemplate>
</Menu>
<TextBlock Text="text" Margin="10" />
</DockPanel>
So now we can consider the converter implementation:
public class CompositeCollectionConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
MenuModel menuModel = value as MenuModel;
if (parameter != null)
{
CollectionContainer collectionContainer = new CollectionContainer();
collectionContainer.Collection = menuModel.Children;
CompositeCollection compositeCollection = new CompositeCollection();
compositeCollection.Add(collectionContainer);
collectionContainer = new CollectionContainer();
collectionContainer.Collection = (IEnumerable)App.Current.MainWindow.FindResource(parameter);
compositeCollection.Add(collectionContainer);
return compositeCollection;
}
else
{
return menuModel.Children;
}
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotSupportedException();
}
}
As you can see it uses its parameter to get a specific resource (in our case I am using the resource called "someOtherMenus", which is an IEnumerable of MenuModels).
Of course the HierarchicalDataTemplate is recursive so the "someOtherMenus" MenuModels will be added to each level (but the first one) of your Menu.
I hope my sample can help you.

Prevent empty tooltips at a wpf datagrid

I am working on a calendar program, which consists mainly of a WPF DataGrid. As there is not always enough space to display all the entries of a day (which is a DataGridCell), a tooltip with all the entries of the day shell appear at mouse over. This works so far with the code snippet shown below. And now the (little) problem: If there are no entries for a day, no tooltip shell pop up. With the code below an empty tooltip pops up.
<DataGridTemplateColumn x:Name="Entry"
IsReadOnly="True">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Grid>
<TextBlock Text="{Binding EntryText}"
Foreground="{Binding EntryForeground}"
FontWeight="{Binding EntryFontWeight}">
</TextBlock>
<TextBlock Text="{Binding RightAlignedText}"
Foreground="Gray"
Background="Transparent">
<TextBlock.ToolTip>
<TextBlock Text="{Binding AllEntriesText}"/>
</TextBlock.ToolTip>
</TextBlock>
</Grid>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
The Databinding is made via
myCalDataGrid.Itemssource = _listOfDays;
in code behind, where a 'Day' is the view model for a single calendar row.
As H.B. suggested bind directly to the ToolTip property instead of using TextBlock and in case AllEntriesText is empty string you can apply a trigger on your TextBlock to disable your tooltip by setting the property ToolTipService.IsEnabled like this -
<TextBlock Text="{Binding RightAlignedText}"
Foreground="Gray"
Background="Transparent"
ToolTip="{Binding AllEntriesText}">
<TextBlock.Style>
<Style TargetType="TextBlock">
<Style.Triggers>
<Trigger Property="ToolTip"
Value="{x:Static system:String.Empty}">
<Setter Property="ToolTipService.IsEnabled" Value="False" />
</Trigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
Make sure to add namespace system in your xaml -
xmlns:system="clr-namespace:System;assembly=mscorlib"
Bind directly to the ToolTip property (do not create a TextBlock for it) and set AllEntriesText to null if there are no entries, then the ToolTip itself is also null and should not show.
Thanks for the solutions, they may work, no question. But I need a TextBlock for the tooltip to format and align the text. So I found this solution:
<TextBlock Text="{Binding RightAlignedText}"
HorizontalAlignment="Stretch"
TextAlignment="Right" Padding="2,0"
Foreground="Gray"
Background="Transparent"
ToolTipService.ShowDuration="60000"
ToolTipService.BetweenShowDelay="0"
ToolTipService.InitialShowDelay="0"
>
<TextBlock.ToolTip>
<ToolTip Visibility="{Binding EntryToolTipVisibility}">
<TextBlock Text="{Binding ToolTipText}"
TextAlignment="Left"
FontFamily="Courier New"/>
</ToolTip>
</TextBlock.ToolTip>
</TextBlock>
I bound the propertie "Visibility" of tooltip to a propertie "EntryToolTipVisibility" (of type Visibility) in the view model. See code snippet below.
public Visibility EntryToolTipVisibility
{
get
{
return _entries.Count > 0 ? Visibility.Visible : Visibility.Collapsed;
}
}
Another option is to use an own Converter.
I prefer this way for example for a TextBlock tooltip that displays TextBlock's text, but for the case there is no text, the empty tooltip is not desired.
XAML code:
//step #1
xmlns:local="clr-namespace:MyNamespace"
//step #2 - into Window.Resources or other
<local:StringToVisibleTooltip x:Key="StringToVis" />
//step #3 - example of use
<TextBlock ...other attributes... TextTrimming="CharacterEllipsis">
<TextBlock.ToolTip>
<ToolTip Visibility="{Binding Path=Text, Converter={StaticResource StringToVis}}">
<TextBlock Text="{Binding Text}"/>
</ToolTip>
</TextBlock.ToolTip>
</TextBlock>
And code behind
namespace MyNamespace
{
public class StringToVisibleTooltip : IValueConverter
{
public StringToVisibleTooltip() { }
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value != null && ((string)value).Length > 0) //empty string does not need tooltip
return Visibility.Visible;
else
return Visibility.Collapsed;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return null;
}
}
}

Use different template for last item in a WPF itemscontrol

I'm using a custom template in my itemscontrol to display the following result:
item 1, item 2, item3,
I want to change the template of the last item so the result becomes:
item 1, item2, item3
The ItemsControl:
<ItemsControl ItemsSource="{Binding Path=MyCollection}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" IsItemsHost="True"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Path=Name}"/>
<TextBlock Text=", "/>
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
Is there anyone who can give a solution for my problem? Thank you!
I've found the solution for my problem using only XAML. If there is anybody who needs to do the same, use this:
<ItemsControl ItemsSource="{Binding Path=MyCollection}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" IsItemsHost="True"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock x:Name="comma" Text=", "/>
<TextBlock Text="{Binding}"/>
</StackPanel>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding RelativeSource={RelativeSource PreviousData}}" Value="{x:Null}">
<Setter TargetName="comma" Property="Visibility" Value="Collapsed"/>
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
You can use DataTemplateSelector, in SelectTemplate() method you can check whether item is the last and then return an other template.
In XAML:
<ItemsControl.ItemTemplate>
<DataTemplate>
<ContentPresenter
ContentTemplateSelector = "{StaticResource MyTemplateSelector}">
In Code behind:
private sealed class MyTemplateSelector: DataTemplateSelector
{
public override DataTemplate SelectTemplate(
object item,
DependencyObject container)
{
// ...
}
}
This solution affects the last row and updates with changes to the underlying collection:
CodeBehind
The converter requires 3 parameters to function properly - the current item, the itemscontrol, the itemscount, and returns true if current item is also last item:
class LastItemConverter : IMultiValueConverter
{
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
int count = (int)values[2];
if (values != null && values.Length == 3 && count>0)
{
System.Windows.Controls.ItemsControl itemsControl = values[0] as System.Windows.Controls.ItemsControl;
var itemContext = (values[1] as System.Windows.Controls.ContentPresenter).DataContext;
var lastItem = itemsControl.Items[count-1];
return Equals(lastItem, itemContext);
}
return DependencyProperty.UnsetValue;
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
XAML
The Data-Trigger for a DataTemplate, that includes a textbox named 'PART_TextBox':
<DataTemplate.Triggers>
<DataTrigger Value="True" >
<DataTrigger.Binding>
<MultiBinding Converter="{StaticResource LastItemConverter}">
<Binding RelativeSource="{RelativeSource FindAncestor, AncestorType={x:Type ItemsControl}}" />
<Binding RelativeSource="{RelativeSource Self}"/>
<Binding RelativeSource="{RelativeSource FindAncestor, AncestorType={x:Type ItemsControl}}" Path="Items.Count"/>
</MultiBinding>
</DataTrigger.Binding>
<Setter Property="Foreground" TargetName="PART_TextBox" Value="Red" />
</DataTrigger>
</DataTemplate.Triggers>
The converter as a static resource in the Xaml
<Window.Resources>
<local:LastItemConverter x:Key="LastItemConverter" />
</Window.Resources>
SnapShot
And a snapshot of it in action
The code has been added to the itemscontrol from this 'codeproject'
https://www.codeproject.com/Articles/242628/A-Simple-Cross-Button-for-WPF
Note the last item's text in red
One question... I see you're using an ItemsControl as opposed to say a ListBox and that it appears to be bound to a collection of strings, and that you're only trying to display the resulting text without formatting the individual parts, which makes me wonder if your desired output is actually the string itself as mentioned in the question, and not an actual ItemsControl per se.
If I'm correct about that, have you considered just using a simple TextBlock bound to the items collection, but fed through a converter? Then Inside the converter, you would cast value to an array of strings, then in the Convert method, simply Join them using a comma as the separator which will automatically, only add them between elements, like so...
var strings = (IEnumerable<String>)value;
return String.Join(", ", strings);

Refreshing a binding that uses a value converter

I have a WPF UI that is bound to an object. I'm using a ValueConverter to convert a property to a specific image by a business rule:
public class ProposalStateImageConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var proposal = value as Proposal;
var basePath = "pack://application:,,,/ePub.Content;component/Images/General/Flag_{0}.png";
string imagePath;
if(proposal.Invoice != null)
{
imagePath = string.Format(basePath, "Good");
}
else
{
imagePath = string.Format(basePath, "Warning");
}
var uri = new Uri(imagePath);
var src = uri.GetImageSource(); //Extention method
return src;
}
}
The element is a TreeView where the image is on the 2nd level:
<TreeView x:Name="tree"
ItemsSource="{Binding People}"
SelectedItemChanged="OnTreeItemChanged">
<TreeView.Resources>
<HierarchicalDataTemplate DataType="{x:Type dmn:Person}"
ItemsSource="{Binding Proposals}">
<StackPanel Orientation="Horizontal" ToolTip="{Binding Path=Fullname}" Margin="3">
<Image Margin="5,0,5,0" Width="16" Height="16" Source="pack://application:,,,/ePub.Content;component/Images/General/Person_Active.png" />
<TextBlock Text="{Binding Path=Firstname}" />
<TextBlock Text="{Binding Path=Lastname}" Margin="5,0,0,0" />
</StackPanel>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate DataType="{x:Type dmn:Proposal}">
<StackPanel Orientation="Horizontal" Margin="3">
<Image x:Name="invoiceImage" Width="16" Height="16" Margin="5,0,5,0" Source="{Binding, Converter={StaticResource ProposalStateImageConverter}, UpdateSourceTrigger=PropertyChanged}" />
<TextBlock Text="{Binding DeliveryDate, Converter={StaticResource textCulturedDateConverter}}" />
</StackPanel>
</HierarchicalDataTemplate>
</TreeView.Resources>
</TreeView>
It is working fine, but later, when the object's state changes, I want to refresh the image and make the value converter reevaluate. How is this possible?
It looks like you're only using a single value inside the converter and you're just doing a simple switch between two values so you could instead just do this directly in XAML with a trigger. This method also switches to a Binding against the Invoice property so that any change notifications for that property will cause the Trigger to update.
<HierarchicalDataTemplate >
<StackPanel Orientation="Horizontal" Margin="3">
<Image x:Name="invoiceImage" Width="16" Height="16" Margin="5,0,5,0" Source="good.png"/>
<TextBlock ... />
</StackPanel>
<HierarchicalDataTemplate.Triggers>
<DataTrigger Binding="{Binding Invoice}" Value="{x:Null}">
<Setter TargetName="invoiceImage" Property="Source" Value="warning.png"/>
</DataTrigger>
</HierarchicalDataTemplate.Triggers>
</HierarchicalDataTemplate>
Assuming you can't use INotifyPropertyChanged because you're binding to the whole object, you need to call BindingExpression.UpdateTarget.
The slight subtlety is in getting hold of the binding expression. This requires you to have a fairly intimate knowledge of the view: as far as I know, the only way to do this is to call BindingOperations.GetBindingExpression, passing the control and property whose binding you want to update, e.g.:
BindingOperations.GetBindingExpression(myImage, Image.SourceProperty).UpdateTarget();

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