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  • Wpf Listbox and CheckBox

    - by Tan
    Hi iam using a listbox to show a list of items. in the listbox i ahve an togglebutton on every item. When i click on the toggle button the state of the togglebutton is pressed. But when i am scrolling down in the listbox and scolls up again. The togglebutton state is not pressed. How can i prevent this please help. Heres my itemtemplate <ListBox.ItemTemplate> <DataTemplate> <StackPanel Margin="0,3,0,0"> <Border BorderBrush="Black" BorderThickness="1,1,1,1"> <Border.Background> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0" MappingMode="RelativeToBoundingBox"> <GradientStop Color="#FFECECEC" Offset="1"/> <GradientStop Color="#FFE8E8E8"/> <GradientStop Color="#FFBDBDBD" Offset="0.153"/> <GradientStop Color="#FFE8E8E8" Offset="0.904"/> </LinearGradientBrush> </Border.Background> <Border.Style> <Style> <Style.Triggers> <DataTrigger Binding="{Binding Path=IsSelected, RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type ListBoxItem}}}" Value="True"> <Setter Property="Border.Height" Value="100"/> <Setter Property="Border.Background"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0" MappingMode="RelativeToBoundingBox"> <GradientStop Color="DarkGray" Offset="1"/> <GradientStop Color="#FFE8E8E8"/> <GradientStop Color="#FFBDBDBD" Offset="0.153"/> <GradientStop Color="DarkGray" Offset="0.904"/> </LinearGradientBrush> </Setter.Value> </Setter> </DataTrigger> </Style.Triggers> </Style> </Border.Style> <StackPanel Orientation="Horizontal" VerticalAlignment="Center"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="500"/> <ColumnDefinition Width="100"/> <ColumnDefinition Width="55"/> </Grid.ColumnDefinitions> <!--Pick number--> <StackPanel Grid.Column="0" VerticalAlignment="Center" Orientation="Vertical"> <TextBlock Text="{Binding Path=FtgNamn}" FontWeight="Bold" FontSize="22pt" FontFamily="Calibri"/> <TextBlock Text="{Binding Path=LevsAttBeskr}" FontSize="18pt" FontFamily="Calibri"/> </StackPanel> <!--Pick Quantity--> <StackPanel Grid.Column="1" VerticalAlignment="Center"> <TextBlock Text="{Binding Path=Antal}" FontSize="44pt" FontFamily="Calibri"/> </StackPanel> <!-- Checkbox--> <StackPanel Grid.Column="2" VerticalAlignment="Center" HorizontalAlignment="Center"> <ToggleButton Name="Check" Width="40" Height="40" Click="Check_Click" Tag="{Binding Path=Plocklista}"> <ToggleButton.Style> <Style TargetType="ToggleButton"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type ToggleButton}"> <Border x:Name="InnerBorder" Background="White" BorderBrush="Black" BorderThickness="1"/> <ControlTemplate.Triggers> <Trigger Property="IsChecked" Value="True"> <Setter TargetName="InnerBorder" Property="Background"> <Setter.Value> <ImageBrush ImageSource="/Images/button_ok.png"/> </Setter.Value> </Setter> <Setter TargetName="InnerBorder" Property="BorderThickness" Value="0"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> </ToggleButton.Style> </ToggleButton> </StackPanel> </Grid> <Border BorderBrush="Darkgray" BorderThickness="0,0,1,0"> </Border> <TextBlock Width="100" Text="{Binding Path=Quantity}" FontSize="44pt" FontFamily="Calibri"/> <CheckBox Width="78"/> </StackPanel> </Border> </StackPanel> </DataTemplate>

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  • Saving to SharedPreferences from custom DialogPreference

    - by Ronnie
    I've currently got a preferences screen, and I've created a custom class that extends DialogPreference and is called from within my Preferences. My preferences data seems store/retrieve from SharedPreferences without an issue, but I'm trying to add 2 more sets of settings from the DialogPreference. Basically I have two issues that I have not been able to find. Every site I've seen gives me the same standard info to save/restore data and I'm still having problems. Firstly I'm trying to save a username and password to my SharedPreferences (visible in the last block of code) and if possibly I'd like to be able to do it in the onClick(). My preferences XML that calls my DialogPreference: <?xml version="1.0" encoding="utf-8"?> <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"> <PreferenceCategory> <com.rone.optusmon.AccDialog android:key="AccSettings" android:title="Account Settings" android:negativeButtonText="Cancel" android:positiveButtonText="Save" /> </PreferenceCategory> </PreferenceScreen> My Preference Activity Class: package com.rone.optusmon; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.os.Bundle; import android.preference.Preference; import android.preference.Preference.OnPreferenceClickListener; import android.preference.PreferenceActivity; import android.view.KeyEvent; public class EditPreferences extends PreferenceActivity { Context context = this; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.preferences); } } My Custom DialogPreference Class file: package com.rone.optusmon; import android.content.Context; import android.content.DialogInterface; import android.content.SharedPreferences; import android.preference.DialogPreference; import android.preference.PreferenceManager; import android.text.method.PasswordTransformationMethod; import android.util.AttributeSet; import android.view.View; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.Toast; public class AccDialog extends DialogPreference implements DialogInterface.OnClickListener { private TextView mUsername, mPassword; private EditText mUserbox, mPassbox; CharSequence mPassboxdata, mUserboxdata; private CheckBox mShowchar; private Context mContext; private int mWhichButtonClicked; public AccDialog(Context context, AttributeSet attrs) { super(context, attrs); mContext = context; } @Override protected View onCreateDialogView() { @SuppressWarnings("unused") LinearLayout.LayoutParams params; LinearLayout layout = new LinearLayout(mContext); layout.setOrientation(LinearLayout.VERTICAL); layout.setPadding(10, 10, 10, 10); layout.setBackgroundColor(0xFF000000); mUsername = new TextView(mContext); mUsername.setText("Username:"); mUsername.setTextColor(0xFFFFFFFF); mUsername.setPadding(0, 8, 0, 3); mUserbox = new EditText(mContext); mUserbox.setSingleLine(true); mUserbox.setSelectAllOnFocus(true); mPassword = new TextView(mContext); mPassword.setText("Password:"); mPassword.setTextColor(0xFFFFFFFF); mPassbox = new EditText(mContext); mPassbox.setSingleLine(true); mPassbox.setSelectAllOnFocus(true); mShowchar = new CheckBox(mContext); mShowchar.setOnCheckedChangeListener(mShowchar_listener); mShowchar.setText("Show Characters"); mShowchar.setTextColor(0xFFFFFFFF); mShowchar.setChecked(false); if(!mShowchar.isChecked()) { mPassbox.setTransformationMethod(new PasswordTransformationMethod()); } layout.addView(mUsername); layout.addView(mUserbox); layout.addView(mPassword); layout.addView(mPassbox); layout.addView(mShowchar); return layout; // Access default SharedPreferences SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this); } public void onClick(DialogInterface dialog, int which) { mWhichButtonClicked = which; // if statement to set save/cancel button roles if (mWhichButtonClicked == -1) { Toast.makeText(mContext, "Save was clicked", Toast.LENGTH_SHORT).show(); mUserboxdata = mUserbox.getText(); mPassboxdata = mPassbox.getText(); // Save user preferences SharedPreferences settings = getDefaultSharedPreferences(this); SharedPreferences.Editor editor = settings.edit(); editor.putString("usernamekey", (String) mUserboxdata); editor.putString("passwordkey", (String) mPassboxdata); } else { Toast.makeText(mContext, "Cancel was clicked", Toast.LENGTH_SHORT).show(); } } } In my SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this); line, Eclipse says "The method getDefaultSharedPreferences(AccDialog) is undefined for the type AccDialog". I've attempted to change the context to my preferences class, use a blank context and I've also tried naming my SharedPrefs and using "getSharedPreferences()" as well. I'm just not sure exactly what I'm doing here. As I'm quite new to Java/Android/coding in general, could you please be as detailed as possible with any help, eg. which of my files I need to write the code in and whereabouts in that file should I write it (i.e. onCreate(), onClick(), etc) Edit: I will need to the preferences to be Application-wide accessible, not activity-wide. Thanks

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  • Dependency Property WPF Grid

    - by developer
    Hi All, I want to Bind the textblock text in WPF datagrid to a dependency property. Somehow, nothing gets displayed, but when I use the same textblock binding outside the grid, everything works fine. Below is my code, <Window.Resources> <Style x:Key="cellCenterAlign" TargetType="{x:Type toolkit:DataGridCell}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type toolkit:DataGridCell}"> <Grid Background="{TemplateBinding Background}"> <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style> <Style x:Key="ColumnHeaderStyle" TargetType="{x:Type toolkit:DataGridColumnHeader}"> <Setter Property="VerticalContentAlignment" Value="Center" /> <Setter Property="HorizontalContentAlignment" Value="Center"/> </Style> <ObjectDataProvider MethodName="GetValues" ObjectType="{x:Type sys:Enum}" x:Key="RoleValues"> <ObjectDataProvider.MethodParameters> <x:Type TypeName="domain:SubscriptionRole"/> </ObjectDataProvider.MethodParameters> </ObjectDataProvider> <DataTemplate x:Key="myTemplate"> <StackPanel> <TextBlock Text="{Binding Path=OtherSubs}"/> </StackPanel> </DataTemplate> </Window.Resources> <Grid> <Grid.RowDefinitions> <RowDefinition Height="220"/> <RowDefinition Height="Auto"/> </Grid.RowDefinitions> <StackPanel Grid.Row="0"> <toolkit:DataGrid Name="definitionGrid" Margin="0,10,0,0" AutoGenerateColumns="False" CanUserAddRows="False" CanUserDeleteRows="False" IsReadOnly="False" RowHeight="25" FontWeight="Normal" ItemsSource="{Binding programSubscription}" ColumnHeaderStyle="{DynamicResource ColumnHeaderStyle}" SelectionMode="Single" ScrollViewer.HorizontalScrollBarVisibility="Disabled" Width="450" ScrollViewer.VerticalScrollBarVisibility="Auto" Height="200"> <toolkit:DataGrid.Columns> <toolkit:DataGridTextColumn Header="Program" Width="80" Binding="{Binding Program.JobNum}" CellStyle="{StaticResource cellCenterAlign}" IsReadOnly="True"/> <toolkit:DataGridTemplateColumn Header="Role" Width="80" CellStyle="{StaticResource cellCenterAlign}"> <toolkit:DataGridTemplateColumn.CellTemplate> <DataTemplate> <ComboBox SelectedItem="{Binding Role}" ItemsSource="{Binding Source={StaticResource RoleValues}}" Width="70"> <ComboBox.Style> <Style> <Style.Triggers> <DataTrigger Binding="{Binding Path=Role}" Value="Owner"> <Setter Property="ComboBox.Focusable" Value="False"/> <Setter Property="ComboBox.IsEnabled" Value="False"/> <Setter Property="ComboBox.IsHitTestVisible" Value="False"/> </DataTrigger> </Style.Triggers> </Style> </ComboBox.Style> </ComboBox> </DataTemplate> </toolkit:DataGridTemplateColumn.CellTemplate> </toolkit:DataGridTemplateColumn> <toolkit:DataGridCheckBoxColumn Header="Email" Width="60" Binding="{Binding ReceivesEmail}" CellStyle="{StaticResource cellCenterAlign}"/> <!--<toolkit:DataGridTextColumn Header="Others" Width="220" Binding="{Binding programSubscription1.Subscriber.Username}" CellStyle="{StaticResource cellCenterAlign}" IsReadOnly="True"/>--> <toolkit:DataGridTemplateColumn Header="Others" Width="220" CellStyle="{StaticResource cellCenterAlign}" IsReadOnly="True"> <toolkit:DataGridTemplateColumn.CellTemplate> <DataTemplate> <TextBlock Text="{Binding Path=OtherSubs}"/> </DataTemplate> </toolkit:DataGridTemplateColumn.CellTemplate> </toolkit:DataGridTemplateColumn> </toolkit:DataGrid.Columns> </toolkit:DataGrid> <TextBlock Text="{Binding Path=OtherSubs}"/> </StackPanel> <Grid Grid.Row="1"> <Grid.ColumnDefinitions> <ColumnDefinition Width="200"/> <ColumnDefinition Width="*"/> </Grid.ColumnDefinitions> <StackPanel Grid.Column="0" HorizontalAlignment="Center" VerticalAlignment="Center"> <CheckBox Content="Show Only Active Programs" IsChecked="True" Margin="0,0,8,0"/> </StackPanel> <StackPanel Orientation="Horizontal" VerticalAlignment="Center" Grid.Column="1" HorizontalAlignment="Right"> <Button Content="Save" Height="23" Width="75" Margin="0,0,8,0" Click="Save_Click"/> <Button Content="Cancel" Height="23" Width="75" Margin="0,0,8,0" Click="Cancel_Click" /> </StackPanel> </Grid> </Grid> Code-Behind public partial class ProgramSubscriptions : Window { public static ObservableCollection programSubscription { get; set; } public string OtherSubs { get { return (string)GetValue(OtherSubsProperty); } set { SetValue(OtherSubsProperty, value); } } public static readonly DependencyProperty OtherSubsProperty = DependencyProperty.Register("OtherSubs", typeof(string), typeof(ProgramSubscriptions), new UIPropertyMetadata(string.Empty)); private string CurrentUsername = "test"; public ProgramSubscriptions() { InitializeComponent(); DataContext = this; LoadData(); } protected void LoadData() { programSubscription = new ObservableCollection<ProgramSubscriptionViewModel>(); if (res != null && res.TotalResults > 0) { List<ProgramSubscriptionViewModel> UserPrgList = new List<ProgramSubscriptionViewModel>(); //other.... List<ProgramSubscriptionViewModel> OtherPrgList = new List<ProgramSubscriptionViewModel>(); ArrayList myList = new ArrayList(); foreach (DomainObject obj in res.ResultSet) { ProgramSubscription prg = (ProgramSubscription)obj; if (prg.Subscriber.Username == CurrentUsername) { UserPrgList.Add(new ProgramSubscriptionViewModel(prg)); myList.Add(prg.Program.ID); } else OtherPrgList.Add(new ProgramSubscriptionViewModel(prg)); } for (int i = 0; i < UserPrgList.Count; i++) { ProgramSubscriptionViewModel item = UserPrgList[i]; programSubscription.Add(item); } //other.... for (int i = 0; i < OtherPrgList.Count; i++) { foreach (int y in myList) { ProgramSubscriptionViewModel otheritem = OtherPrgList[i]; if (y == otheritem.Program.ID) OtherSubs += otheritem.Subscriber.Username + ", "; } } } } } I posted the entire code. What exactly I want to do is in the datagridtemplatecolumn for others I want to display the usernames that are not in CurrentUsername, but they have the same program Id as the CurrentUsername. Please do let me know if there is another way that i can make this work, instead of using a dependencyproperty, althouht for testing I did put a textblock below datagrid, and it works perfectly fine.. Help!

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  • Visualising a 'Smarties' lid using XAML (WPF/Silverlight, Visual Studio/Blend)

    - by Mr. Disappointment
    Hi folks, First off, to clarify something in the title which could well be ambiguous/misleading, I'd like to inform you of my definition of 'Smarties', as I know often products are available all over - only under a different alias. Smarties are a candy product in the UK, little chocolate drops covered in a crispy shell which are distributed in a card tube, this tube used to have a plastic lid/top with an individual letter on the underside (they've taken a more economical approach as of late), the lid/top of the old-style tube is the main element of this question. Familiarisation Link Lid View Link Okay, now with the seller-type pitch out of the way (no, I don't work for Nestlé ;)), hopefully the question is becoming rather clear. Essentially, I'd like to recreate one of these lids using XAML, ultimately to be utilised in a Silverlight web application. That is, I'd like to result in a reusable control, of which the following is true: It looks like a Smarties lid. The colour can be specified. The letter can be specified. The control can be rotated to display either side. The second two seem trivial, but we must bare in mind that the background colour specified will almost, if not always, be the same as the foreground, leaving a visibility issue where the character content is concerned; as for the rotation, I'm hoping this kind of functionality is reasonably available, and acceptable to implement. So, to put this out there, consider a control named SmartiesLid which derives from ToggleButton (appropriate?) and further plotted out using a style in a resource dictionary which applies to it, as follows: <Style TargetType="local:SmartiesLid"> <Setter Property="Background" Value="Red"/> <Setter Property="Foreground" Value="Red"/> <Setter Property="VerticalContentAlignment" Value="Center"/> <Setter Property="HorizontalContentAlignment" Value="Center"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="local:SmartiesLid"> <Grid x:Name="LayoutRoot"> <Grid.ColumnDefinitions> <ColumnDefinition Width=".05*"/> <ColumnDefinition/> <ColumnDefinition/> <ColumnDefinition Width=".05*"/> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height=".05*"/> <RowDefinition/> <RowDefinition/> <RowDefinition Height=".05*"/> <RowDefinition Height=".1*"/> </Grid.RowDefinitions> <Ellipse Grid.RowSpan="4" Grid.ColumnSpan="4" Fill="{TemplateBinding Background}" Stroke="Transparent"/> <Ellipse Grid.RowSpan="2" Grid.ColumnSpan="2" Grid.Column="1" Grid.Row="1" Fill="{TemplateBinding Background}" Stroke="Transparent"> <Ellipse.Effect> <DropShadowEffect Direction="280" ShadowDepth="6" BlurRadius="6"/> </Ellipse.Effect> </Ellipse> <TextBlock Grid.RowSpan="2" Grid.ColumnSpan="2" Grid.Column="1" Grid.Row="1" Name="LetterTextBlock" Text="{TemplateBinding Content}" Foreground="{TemplateBinding Foreground}" FontSize="190" HorizontalAlignment="Center" VerticalAlignment="Center"> </TextBlock> <!-- <Path Stretch="Fill" Grid.Row="3" Grid.RowSpan="2" Grid.Column="1" Grid.ColumnSpan="2" Fill="Black" Data="..."> How to craw the lid 'tab'? </Path> --> </Grid> <ControlTemplate.Resources> <TranslateTransform x:Key="IndentTransform" X="10" /> <RotateTransform x:Key="RotateTransform" Angle="0" /> <Storyboard x:Key="MouseOver"> </Storyboard> <Storyboard x:Key="MouseLeave"> </Storyboard> </ControlTemplate.Resources> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="true"> <Trigger.EnterActions> <BeginStoryboard Storyboard="{StaticResource MouseOver}"/> </Trigger.EnterActions> <Trigger.ExitActions> <BeginStoryboard Storyboard="{StaticResource MouseLeave}"/> </Trigger.ExitActions> </Trigger> <Trigger Property="IsPressed" Value="true"> <Setter TargetName="LayoutRoot" Property="RenderTransform" Value="{StaticResource IndentTransform}"/> </Trigger> <Trigger Property="IsChecked" Value="true"> <Setter TargetName="LayoutRoot" Property="RenderTransform" Value="{StaticResource RotateTransform}"/> </Trigger> <Trigger Property="IsEnabled" Value="False"> <Setter Property="Foreground" Value="Gray"/> <Setter Property="Opacity" Value="0.5"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> With this in mind, can anyone give input on, in decreasing order of my incompetence in an area: Designing the overall look and feel of the damn thing (I'm no designer, and while I could hack away at this single control for days and potentially get something relatively useful, it's always a gamble). The particular barrier for me here is 'pathing' the tab of the lid, as you will see in the XAML as an element commented out. Should Path be used, or would it be more appropriate to transform a rectangle with rounded corners, or any specific suggestions? Bevelling the individually displayed letter; as detailed above, when the colour of both the foreground and background are the same then this will be invisible if no effects are applied, also for a decent level of realism I'd like to be able to apply such an effect/s. So far use of DropShadow and Balder3DEngine have fulfilled my requirements for graphics in XAML, how achievable is a bevel effect? Rotating the control on mouse-click, that is, showing the opposing face. Is this going to be possible using a style and XAML only for the design? Or is it that ugliness may rear it's head in the form of code-behind to show/hide embedded controls? Should the faces be separate controls and later somehow combined? Allowing the control to size dynamically. I'm supposing I will be able to convert a solid, absolute layout to a nice generic one when I actually have the former in place. Obviously this entails sizing the centralised letter and the lid 'tab', but that's it really, other than keeping the aspect ratio equal (since the ellipses grow nicely with the grid). Any suggestions to approaching this would be greatly appreciated, particularly with a dynamically growing font - I've done that before in a web-imaging scenario using code and System.Drawing, and wouldn't like to approach it in even a similar way. By the way, the reason I specify both WPF and Silverlight is that, from my current knowledge, the inputs being written targeting either of these will be fairly transferable for similar output by the other, albeit not without alterations in either scenario. The resulting application is in fact destined to be written in Silverlight, however, so I don't fancy inviting anything from WPF which will guarantee my only being able to convert 90% of it. I'll go give this little project a start, maybe in Blend(?), hopefully can catch up with some advice shortly. Thanks, Mr. D EDIT: Next question, ought this to be broken up into separate questions? :/

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  • Horrorble performance using ListViews with nested objects in WPF

    - by Christian
    Hi community, like mentioned in the title I get a horrible performance if I use ListViews with nested objects. My scenario is: Each row of a ListView presents an object of the class Transaction with following attributes: private int mTransactionID; private IBTTransactionSender mSender; private IBTTransactionReceiver mReceiver; private BTSubstrate mSubstrate; private double mAmount; private string mDeliveryNote; private string mNote; private DateTime mTransactionDate; private DateTime mCreationTimestamp; private BTEmployee mEmployee; private bool mImported; private bool mDescendedFromRecurringTransaction; Each attribute can be accessed by its corresponding property. An ObservableCollection<Transaction> is bound to the ItemsSource of a ListView. The ListView itself looks like the following: </ListView.GroupStyle> <ListView.View> <GridView> <GridViewColumn core:SortableListView.SortPropertyName="Transaction.ToSave" Width="80"> <GridViewColumnHeader Name="GVCHLoadedToSave" Style="{StaticResource ListViewHeaderStyle}">Speichern</GridViewColumnHeader> <GridViewColumn.CellTemplate> <DataTemplate> <Grid> <CheckBox Name="CBListViewItem" IsChecked="{Binding Path=Transaction.ToSave, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></CheckBox> </Grid> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> <GridViewColumn core:SortableListView.SortPropertyName="Transaction.TransactionDate" Width="80"> <GridViewColumnHeader Name="GVCHLoadedDate" Style="{StaticResource ListViewHeaderStyle}">Datum</GridViewColumnHeader> <GridViewColumn.CellTemplate> <DataTemplate> <Grid> <TextBlock Text="{Binding ElementName=DPDate, Path=Text}" Style="{StaticResource GridBlockStyle}"/> <toolkit:DatePicker Name="DPDate" Width="{Binding ElementName=GVCHDate, Path=ActualWidth}" SelectedDateFormat="Short" Style="{StaticResource GridEditStyle}" SelectedDate="{Binding Path=Transaction.TransactionDate, Mode=TwoWay}" SelectedDateChanged="DPDate_SelectedDateChanged"/> </Grid> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> <GridViewColumn core:SortableListView.SortPropertyName="Transaction.Sender.Description" Width="120"> <GridViewColumnHeader Name="GVCHLoadedSender" Style="{StaticResource ListViewHeaderStyle}">Von</GridViewColumnHeader> <GridViewColumn.CellTemplate> <DataTemplate> <Grid> <TextBlock Text="{Binding Path=Transaction.Sender.Description}" Style="{StaticResource GridBlockStyle}"/> <ComboBox Name="CBSender" Width="{Binding ElementName=GVCHSender, Path=ActualWidth}" SelectedItem="{Binding Path=Transaction.Sender}" DisplayMemberPath="Description" Text="{Binding Path=Sender.Description, Mode=OneWay}" ItemsSource="{Binding ElementName=Transaction, Path=SenderList}" Style="{StaticResource GridEditStyle}"> </ComboBox> </Grid> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> <GridViewColumn core:SortableListView.SortPropertyName="Transaction.Receiver.Description" Width="120"> <GridViewColumnHeader Name="GVCHLoadedReceiver" Style="{StaticResource ListViewHeaderStyle}">Nach</GridViewColumnHeader> <GridViewColumn.CellTemplate> <DataTemplate> <Grid> <TextBlock Text="{Binding Path=Transaction.Receiver.Description}" Style="{StaticResource GridBlockStyle}"/> <ComboBox Name="CBReceiver" Width="{Binding ElementName=GVCHReceiver, Path=ActualWidth}" SelectedItem="{Binding Path=Transaction.Receiver}" DisplayMemberPath="Description" Text="{Binding Path=Receiver.Description, Mode=OneWay}" ItemsSource="{Binding ElementName=Transaction, Path=ReceiverList}" Style="{StaticResource GridEditStyle}"> </ComboBox> </Grid> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> <GridViewColumn core:SortableListView.SortPropertyName="Transaction.Substrate.Description" Width="140"> <GridViewColumnHeader Name="GVCHLoadedSubstrate" Style="{StaticResource ListViewHeaderStyle}">Substrat</GridViewColumnHeader> <GridViewColumn.CellTemplate> <DataTemplate> <Grid> <TextBlock Text="{Binding Path=Transaction.Substrate.Description}" Style="{StaticResource GridBlockStyle}"/> <ComboBox Name="CBSubstrate" Width="{Binding ElementName=GVCHSubstrate, Path=ActualWidth}" SelectedItem="{Binding Path=Transaction.Substrate}" DisplayMemberPath="Description" Text="{Binding Path=Substrate.Description, Mode=OneWay}" ItemsSource="{Binding ElementName=Transaction, Path=SubstrateList}" Style="{StaticResource GridEditStyle}"> </ComboBox> </Grid> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> <GridViewColumn core:SortableListView.SortPropertyName="Transaction.Amount" Width="80"> <GridViewColumnHeader Name="GVCHLoadedAmount" Style="{StaticResource ListViewHeaderStyle}">Menge [kg]</GridViewColumnHeader> <GridViewColumn.CellTemplate> <DataTemplate> <Grid> <TextBlock Text="{Binding Path=Transaction.Amount}" Style="{StaticResource GridBlockStyle}"/> <TextBox Name="TBAmount" Text="{Binding Path=Transaction.Amount, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Width="{Binding ElementName=GVCHAmount, Path=ActualWidth}" Style="{StaticResource GridTextBoxStyle}" /> </Grid> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> <GridViewColumn core:SortableListView.SortPropertyName="Transaction.DeliveryNote" Width="100"> <GridViewColumnHeader Name="GVCHLoadedDeliveryNote" Style="{StaticResource ListViewHeaderStyle}">Lieferschein Nr.</GridViewColumnHeader> <GridViewColumn.CellTemplate> <DataTemplate> <Grid> <TextBlock Text="{Binding Path=Transaction.DeliveryNote}" Style="{StaticResource GridBlockStyle}"/> <TextBox Name="TBDeliveryNote" Text="{Binding Path=Transaction.DeliveryNote, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Width="{Binding ElementName=GVCHDeliveryNote, Path=ActualWidth}" Style="{StaticResource GridEditStyle}" /> </Grid> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> <GridViewColumn core:SortableListView.SortPropertyName="Transaction.Note" Width="190"> <GridViewColumnHeader Name="GVCHLoadedNote" Style="{StaticResource ListViewHeaderStyle}">Bemerkung</GridViewColumnHeader> <GridViewColumn.CellTemplate> <DataTemplate> <Grid> <TextBlock Text="{Binding Path=Transaction.Note}" Style="{StaticResource GridBlockStyle}"/> <TextBox Name="TBNote" Text="{Binding Path=Transaction.Note, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Width="{Binding ElementName=GVCHNote, Path=ActualWidth}" Style="{StaticResource GridEditStyle}" /> </Grid> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> <GridViewColumn core:SortableListView.SortPropertyName="Transaction.Employee.LastName" Width="100"> <GridViewColumnHeader Name="GVCHLoadedEmployee" Style="{StaticResource ListViewHeaderStyle}">Mitarbeiter</GridViewColumnHeader> <GridViewColumn.CellTemplate> <DataTemplate> <Grid> <TextBlock Text="{Binding Path=Transaction.Employee.LastName}" Style="{StaticResource GridBlockStyle}"/> <ComboBox Name="CBEmployee" Width="{Binding ElementName=GVCHEmployee, Path=ActualWidth}" SelectedItem="{Binding Path=Transaction.Employee}" DisplayMemberPath="LastName" Text="{Binding Path=Employee.LastName, Mode=OneWay}" ItemsSource="{Binding ElementName=Transaction, Path=EmployeeList}" Style="{StaticResource GridEditStyle}"> </ComboBox> </Grid> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> </GridView> </ListView.View> </ListView> As you can see in the screenshot the user got the possibility to change the values of the transaction attributes with comboboxes. Ok now to my problem. If I click on the "Laden" button the application will load about 150 entries in the ObservableCollection<Transaction>. Before I fill the collection I set the ItemsSource of the ListView to null and after filling I bind the collection to the ItemsSource once again. The loading itself takes a few milliseconds, but the rendering of the filled collection takes a long time (150 entries = about 20 sec). I tested to delete all Comboboxes out of the xaml and i got a better performance, because I don't have to fill the ComboBoxes for each row. But I need to have these comboboxes for modifing the attributes of the Transaction. Does anybody know how to improve the performance? THX

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  • Silverlight MVVM Confusion: Updating Image Based on State

    - by senfo
    I'm developing a Silverlight application and I'm trying to stick to the MVVM principals, but I'm running into some problems changing the source of an image based on the state of a property in the ViewModel. For all intents and purposes, you can think of the functionality I'm implementing as a play/pause button for an audio app. When in the "Play" mode, IsActive is true in the ViewModel and the "Pause.png" image on the button should be displayed. When paused, IsActive is false in the ViewModel and "Play.png" is displayed on the button. Naturally, there are two additional images to handle when the mouse hovers over the button. I thought I could use a Style Trigger, but apparently they're not supported in Silverlight. I've been reviewing a forum post with a question similar to mine where it's suggested to use the VisualStateManager. While this might help with changing the image for hover/normal states, the part missing (or I'm not understanding) is how this would work with a state set via the view model. The post seems to apply only to events rather than properties of the view model. Having said that, I also haven't successfully completed the normal/hover affects, either. Below is my Silverlight 4 XAML. It should also probably be noted I'm working with MVVM Light. <UserControl x:Class="Foo.Bar.MyUserControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity" mc:Ignorable="d" d:DesignHeight="100" d:DesignWidth="200"> <UserControl.Resources> <Style x:Key="MyButtonStyle" TargetType="Button"> <Setter Property="IsEnabled" Value="true"/> <Setter Property="IsTabStop" Value="true"/> <Setter Property="Background" Value="#FFA9A9A9"/> <Setter Property="Foreground" Value="#FF000000"/> <Setter Property="MinWidth" Value="5"/> <Setter Property="MinHeight" Value="5"/> <Setter Property="Margin" Value="0"/> <Setter Property="HorizontalAlignment" Value="Left" /> <Setter Property="HorizontalContentAlignment" Value="Center"/> <Setter Property="VerticalAlignment" Value="Top" /> <Setter Property="VerticalContentAlignment" Value="Center"/> <Setter Property="Cursor" Value="Hand"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="Button"> <Grid> <Image Source="/Foo.Bar;component/Resources/Icons/Bar/Play.png"> <VisualStateManager.VisualStateGroups> <VisualStateGroup x:Name="Active"> <VisualState x:Name="MouseOver"> <Storyboard> <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Source" Storyboard.TargetName="/Foo.Bar;component/Resources/Icons/Bar/Play_Hover.png" /> </Storyboard> </VisualState> </VisualStateGroup> </VisualStateManager.VisualStateGroups> </Image> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style> </UserControl.Resources> <Grid x:Name="LayoutRoot" Background="White"> <Button Style="{StaticResource MyButtonStyle}" Command="{Binding ChangeStatus}" Height="30" Width="30" /> </Grid> </UserControl> What is the proper way to update images on buttons with the state determined by the view model? Update I changed my Button to a ToggleButton hoping I could use the Checked state to differentiate between play/pause. I practically have it, but I ran into one additional problem. I need to account for two states at the same time. For example, Checked Normal/Hover and Unchecked Normal/Hover. Following is my updated XAML: <UserControl x:Class="Foo.Bar.MyUserControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity" mc:Ignorable="d" d:DesignHeight="100" d:DesignWidth="200"> <UserControl.Resources> <Style x:Key="MyButtonStyle" TargetType="ToggleButton"> <Setter Property="IsEnabled" Value="true"/> <Setter Property="IsTabStop" Value="true"/> <Setter Property="Background" Value="#FFA9A9A9"/> <Setter Property="Foreground" Value="#FF000000"/> <Setter Property="MinWidth" Value="5"/> <Setter Property="MinHeight" Value="5"/> <Setter Property="Margin" Value="0"/> <Setter Property="HorizontalAlignment" Value="Left" /> <Setter Property="HorizontalContentAlignment" Value="Center"/> <Setter Property="VerticalAlignment" Value="Top" /> <Setter Property="VerticalContentAlignment" Value="Center"/> <Setter Property="Cursor" Value="Hand"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="ToggleButton"> <Grid> <VisualStateManager.VisualStateGroups> <VisualStateGroup x:Name="CommonStates"> <VisualState x:Name="Normal"> <Storyboard> <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="Pause"> <DiscreteObjectKeyFrame KeyTime="0"> <DiscreteObjectKeyFrame.Value> <Visibility>Collapsed</Visibility> </DiscreteObjectKeyFrame.Value> </DiscreteObjectKeyFrame> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> <VisualState x:Name="MouseOver"> <Storyboard> <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="PlayHover"> <DiscreteObjectKeyFrame KeyTime="0"> <DiscreteObjectKeyFrame.Value> <Visibility>Visible</Visibility> </DiscreteObjectKeyFrame.Value> </DiscreteObjectKeyFrame> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="Play"> <DiscreteObjectKeyFrame KeyTime="0"> <DiscreteObjectKeyFrame.Value> <Visibility>Collapsed</Visibility> </DiscreteObjectKeyFrame.Value> </DiscreteObjectKeyFrame> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> </VisualStateGroup> <VisualStateGroup x:Name="CheckStates"> <VisualState x:Name="Checked"> <Storyboard> <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="Pause"> <DiscreteObjectKeyFrame KeyTime="0"> <DiscreteObjectKeyFrame.Value> <Visibility>Visible</Visibility> </DiscreteObjectKeyFrame.Value> </DiscreteObjectKeyFrame> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="Play"> <DiscreteObjectKeyFrame KeyTime="0"> <DiscreteObjectKeyFrame.Value> <Visibility>Collapsed</Visibility> </DiscreteObjectKeyFrame.Value> </DiscreteObjectKeyFrame> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="PlayHover"> <DiscreteObjectKeyFrame KeyTime="0"> <DiscreteObjectKeyFrame.Value> <Visibility>Collapsed</Visibility> </DiscreteObjectKeyFrame.Value> </DiscreteObjectKeyFrame> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> <VisualState x:Name="Unchecked" /> </VisualStateGroup> </VisualStateManager.VisualStateGroups> <Image x:Name="Play" Source="/Foo.Bar;component/Resources/Icons/Bar/Play.png" /> <Image x:Name="Pause" Source="/Foo.Bar;component/Resources/Icons/Bar/Pause.png" Visibility="Collapsed" /> <Image x:Name="PlayHover" Source="/Foo.Bar;component/Resources/Icons/Bar/Play_Hover.png" Visibility="Collapsed" /> <Image x:Name="PauseHover" Source="/Foo.Bar;component/Resources/Icons/Bar/Pause_Hover.png" Visibility="Collapsed" /> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style> </UserControl.Resources> <Grid x:Name="LayoutRoot" Background="White"> <ToggleButton Style="{StaticResource MyButtonStyle}" IsChecked="{Binding IsPlaying}" Command="{Binding ChangeStatus}" Height="30" Width="30" /> </Grid> </UserControl>

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