So I have a loading control which if effectively a usercontrol that says "Loading" over the top of my main user control, preventing the user interacting with my program until it is loaded.
I would like to use visual states to transition the visibility of the "Loading" control to slowly fade to collapsed and stay collapsed for any other state within my program.
I currently have my loading control:
<ContentControl x:Name="contentControl" Content="{StaticResource loadingAnimation}">
<i:Interaction.Triggers>
<ei:DataTrigger Value="false" Binding="{Binding IsLoadingAnimationVisible}">
<ei:GoToStateAction StateName="Loaded"/>
</ei:DataTrigger>
</i:Interaction.Triggers>
</ContentControl>
Where:
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="VisualStateGroup">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0:0:0.5" To="Collapsed">
<VisualTransition.GeneratedEasingFunction>
<CubicEase EasingMode="EaseInOut"/>
</VisualTransition.GeneratedEasingFunction>
</VisualTransition>
<VisualTransition GeneratedDuration="0:0:0.5" To="Expanded">
<VisualTransition.GeneratedEasingFunction>
<CubicEase EasingMode="EaseInOut"/>
</VisualTransition.GeneratedEasingFunction>
</VisualTransition>
<VisualTransition GeneratedDuration="0:0:0.5" To="Loaded">
<VisualTransition.GeneratedEasingFunction>
<CubicEase EasingMode="EaseInOut"/>
</VisualTransition.GeneratedEasingFunction>
</VisualTransition>
</VisualStateGroup.Transitions>
<VisualState x:Name="Expanded">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="contentControl">
<DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Collapsed}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Collapsed">
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(FrameworkElement.Width)" Storyboard.TargetName="metaGrid">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="contentControl">
<DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Collapsed}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Loaded">
<Storyboard>
<BooleanAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.IsHitTestVisible)" Storyboard.TargetName="contentControl">
<DiscreteBooleanKeyFrame KeyTime="0" Value="False"/>
</BooleanAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="contentControl">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
now the problem with this is that when I trigger the Expanded and Collapsed states the "Loading" contentControl becomes visible and then fades to collapsed over .5 seconds.
How can I permanently set the loading control to collapsed once the Loaded state has been triggered?
EDIT
I am not sure this is the correct way to transition a visibility in blend (i.e. setting ishittestvisible = false and opacitiy = 0 but it was the only way I could think as setting visibility.collapsed didnt seem to transition when I tried it, it would snap to collapsed)
It sounds like you want to use the Timeline.BeginTime Property. Using this property, you can delay the start of the Visibility.Collapsed Animation. Ideally, you should set the Duration property on your DoubleAnimationUsingKeyFrames object too. Try this:
<VisualState x:Name="Collapsed">
<Storyboard>
<DoubleAnimationUsingKeyFrames Duration="0:0:5" Storyboard.TargetProperty="(FrameworkElement.Width)" Storyboard.TargetName="metaGrid">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames BeginTime="0:0:5" Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="contentControl">
<DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Collapsed}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
Related
I have TabView that basically looks like this:
<controls:TabView
x:Name="PlaylistTabView">
<controls:TabView.ItemHeaderTemplate>
<DataTemplate x:DataType="data:Playlist">
// Something
</DataTemplate>
</controls:TabView.ItemHeaderTemplate>
<controls:TabView.ItemTemplate>
<DataTemplate x:DataType="data:Playlist">
<local:HeaderedPlaylistControl IsPlaylist="True" Loaded="HeaderedPlaylistControl_Loaded" />
</DataTemplate>
</controls:TabView.ItemTemplate>
<controls:TabView.TabStartHeader>
// Something
</controls:TabView.TabStartHeader>
<controls:TabView.TabEndHeader>
// Something
</controls:TabView.TabEndHeader>
<controls:TabView.Footer>
<RelativePanel
x:Name="PlaylistFooter"
Height="{StaticResource PlaylistTabFooterHeight}"
RenderTransformOrigin="0,0">
<RelativePanel.RenderTransform>
<TranslateTransform />
</RelativePanel.RenderTransform>
<local:IconTextButton
x:Name="ShowAllPlaylistButton"
Padding="10,5"
IconTextMargin="0,0,10,0"
LabelPosition="Left"
RelativePanel.AlignRightWithPanel="True"
Style="{StaticResource PlaylistIconTextButtonStyle}"
ToolTipService.ToolTip="Show All Playlists">
<local:IconTextButton.Icon>
<FontIcon
x:Name="UpArrowIcon"
FontFamily="Segoe MDL2 Assets"
FontWeight="{x:Bind ShowAllPlaylistButton.FontWeight}"
Glyph=""
RenderTransformOrigin=".5,.5">
<FontIcon.RenderTransform>
<RotateTransform />
</FontIcon.RenderTransform>
</FontIcon>
</local:IconTextButton.Icon>
<local:IconTextButton.Flyout>
<MenuFlyout Closed="ClosePlaylistsFlyout" Opening="OpenPlaylistsFlyout" />
</local:IconTextButton.Flyout>
</local:IconTextButton>
<local:IconTextButton
x:Name="SortByButton"
Padding="10,5"
HorizontalAlignment="Right"
Icon="Sort"
IconTextMargin="10,0,0,0"
Label="Sort By Title"
LabelPosition="Right"
RelativePanel.AlignLeftWithPanel="True"
Style="{StaticResource PlaylistIconTextButtonStyle}"
Tapped="SortByButton_Tapped"
ToolTipService.ToolTip="Sort Playlists" />
</RelativePanel>
</controls:TabView.Footer>
</controls:TabView>
I have a local:HeaderedPlaylistControl in the ItemTemplate which is basically a ListView. I want to implement the effect that as you scroll down the footer will translate down and when you scroll up the footer will quickly show up.
I am able to implement such effect. However, I am only moving the PlaylistFooter not the TabView.Footer, meaning that the Footer lingers and leaves a blank space at the bottom as is shown in the picture below. How can I move the footer as well?
I checked your code， I found you have implemented TranslateTransform for PlaylistFooter, if you just move the PlaylistFooter down not set Visibility as Collapsed, the footer will still display, So the better way is set Visibility as Collapsed.
<VisualStateGroup x:Name="FooterVisibilityStates">
<VisualState x:Name="FooterFadeIn">
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="PlaylistFooter" Storyboard.TargetProperty="Opacity">
<EasingDoubleKeyFrame KeyTime="0" Value="0" />
<EasingDoubleKeyFrame KeyTime="0:0:0.3" Value="1" />
</DoubleAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaylistFooter" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed"/>
<DiscreteObjectKeyFrame KeyTime="0:0:0.3" Value="Visibility" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="FooterFadeOut">
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="PlaylistFooter" Storyboard.TargetProperty="Opacity">
<EasingDoubleKeyFrame KeyTime="0" Value="1" />
<EasingDoubleKeyFrame KeyTime="0:0:0.4" Value="0" />
</DoubleAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaylistFooter" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Visible"/>
<DiscreteObjectKeyFrame KeyTime="0:0:0.4" Value="Collapsed" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaylistFooter" Storyboard.TargetProperty="IsHitTestVisible">
<DiscreteObjectKeyFrame KeyTime="0" Value="False" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
Update
After discuss with Seaky Luo, we found a solution that set PlaylistFooter height as 0 when the list view scroll down. For more please refer the following code.
<Storyboard x:Name="HideFooterAnimation">
<DoubleAnimation
Storyboard.TargetName="PlaylistFooter"
Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.Y)"
To="0"
Duration="0:0:0.1" />
<ObjectAnimationUsingKeyFrames
Storyboard.TargetName="PlaylistFooter"
Storyboard.TargetProperty="Height"
Duration="0:0:0.1">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PlaylistTabFooterHeight}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Name="ShowFooterAnimation">
<DoubleAnimation
Storyboard.TargetName="PlaylistFooter"
Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.Y)"
To="{StaticResource PlaylistTabFooterHeight}"
Duration="0" />
<ObjectAnimationUsingKeyFrames
Storyboard.TargetName="PlaylistFooter"
Storyboard.TargetProperty="Height"
Duration="0">
<DiscreteObjectKeyFrame KeyTime="0" Value="0" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
I am trying to style a toggle button and I want the Foreground colour for the selected state and the MouseOver state to be white.
My style is as follows:
<Window.Resources>
<ControlTemplate x:Key="MenuButton" TargetType="{x:Type ToggleButton}">
<Border x:Name="border" >
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="MouseOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(FrameworkElement.Cursor)" Storyboard.TargetName="MenuItemContainer">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Cursor>Hand</Cursor>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(TextElement.Foreground).(SolidColorBrush.Color)" Storyboard.TargetName="menuText">
<EasingColorKeyFrame KeyTime="0" Value="White"/>
</ColorAnimationUsingKeyFrames>
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(TextElement.Foreground).(SolidColorBrush.Color)" Storyboard.TargetName="icon">
<EasingColorKeyFrame KeyTime="0" Value="White"/>
</ColorAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Normal"/>
</VisualStateGroup>
<VisualStateGroup x:Name="CheckStates">
<VisualState x:Name="Checked">
<Storyboard>
<ThicknessAnimationUsingKeyFrames Storyboard.TargetProperty="(Border.BorderThickness)" Storyboard.TargetName="border">
<EasingThicknessKeyFrame KeyTime="0" Value="4,0,0,0"/>
</ThicknessAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(Border.BorderBrush)" Storyboard.TargetName="border">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="#FF19AA8D"/>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(TextElement.Foreground).(SolidColorBrush.Color)" Storyboard.TargetName="icon">
<EasingColorKeyFrame KeyTime="0" Value="White"/>
</ColorAnimationUsingKeyFrames>
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(TextElement.Foreground).(SolidColorBrush.Color)" Storyboard.TargetName="menuText">
<EasingColorKeyFrame KeyTime="0" Value="White"/>
</ColorAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unchecked"/>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<StackPanel x:Name="MenuItemContainer" Orientation="Horizontal" Height="46" Margin="14,0,0,0" Background="Transparent" >
<TextBlock x:Name="icon" Grid.Column="0" VerticalAlignment="Center" FontFamily="{StaticResource FontAwesome}" Foreground="#a7b1c2" FontSize="13" Text="" Margin="0,0,6,0"/>
<TextBlock x:Name="menuText" VerticalAlignment="Center" Foreground="#a7b1c2" FontSize="13" Text="{TemplateBinding Property=ContentControl.Content}"/>
</StackPanel>
</Border>
</ControlTemplate>
</Window.Resources>
This is working fine and for MouseOver and Selected states the foreground is set to white. However in Expression Blend Designer I see a warning message which says "To Avoid Unpredictable behaviour, you should not change an object-property in more than one state ..."
Should I just ignore this warning or is there a better way to implement what I am trying to achieve?
Thanks
Yes, you should care about the warning. And in fact the style doesn't behave correctly. Do the following test:
1: set the button to checked -> the text turns to white -> ok
2: move the mouse away -> the text stays in white -> ok
3: move the mouse over the button -> the text stays in white -> ok
4: move the mouse away -> the text turns back to your non-checked default Color -> not ok
In other words you should not modify the same property of the same control from two different visual state groups. Just because the last change wins.
A solution in your case could be this:
<ControlTemplate x:Key="MenuButton" TargetType="{x:Type ToggleButton}">
<Border x:Name="border" >
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="MouseOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(FrameworkElement.Cursor)" Storyboard.TargetName="MenuItemContainer">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Cursor>Hand</Cursor>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(FrameworkElement.Visibility)" Storyboard.TargetName="menuTextMouseOver">
<DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="iconMouseOver">
<DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="menuText">
<DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="icon">
<DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Normal"/>
</VisualStateGroup>
<VisualStateGroup x:Name="CheckStates">
<VisualState x:Name="Checked">
<Storyboard>
<ThicknessAnimationUsingKeyFrames Storyboard.TargetProperty="(Border.BorderThickness)" Storyboard.TargetName="border">
<EasingThicknessKeyFrame KeyTime="0" Value="4,0,0,0"/>
</ThicknessAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(Border.BorderBrush)" Storyboard.TargetName="border">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="#FF19AA8D"/>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(TextElement.Foreground).(SolidColorBrush.Color)" Storyboard.TargetName="icon">
<EasingColorKeyFrame KeyTime="0" Value="White"/>
</ColorAnimationUsingKeyFrames>
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(TextElement.Foreground).(SolidColorBrush.Color)" Storyboard.TargetName="menuText">
<EasingColorKeyFrame KeyTime="0" Value="White"/>
</ColorAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unchecked"/>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<StackPanel x:Name="MenuItemContainer" Orientation="Horizontal" Height="46" Margin="14,0,0,0" Background="Transparent" >
<TextBlock x:Name="iconMouseOver" Grid.Column="0" VerticalAlignment="Center" Foreground="White" FontSize="13" Text="the icon" Margin="0,0,6,0" Visibility="Collapsed"/>
<TextBlock x:Name="menuTextMouseOver" VerticalAlignment="Center" Foreground="White" FontSize="13" Text="{TemplateBinding Property=ContentControl.Content}" Visibility="Collapsed"/>
<TextBlock x:Name="icon" Grid.Column="0" VerticalAlignment="Center" Foreground="#a7b1c2" FontSize="13" Text="the icon" Margin="0,0,6,0"/>
<TextBlock x:Name="menuText" VerticalAlignment="Center" Foreground="#a7b1c2" FontSize="13" Text="{TemplateBinding Property=ContentControl.Content}"/>
</StackPanel>
</Border>
</ControlTemplate>
I try to change the button foreground color using visual sate manager its does not work at all.
<Button x:Name="Close" HorizontalAlignment="Stretch"
Width="100" Background="#FF4F4F4F"
Height="50" BorderThickness="2" BorderBrush="#FF2F2F2F"
Content="Cancel">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="PointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Close"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="#FFFFFFFF" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Close"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="#FFFFFFFF" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</Button>
please help me to work this.
Thanks in advance.
It is not working because you were trying to set Color value for a Brush type.
Please create a Brush StaticResource using the color you need. And set the resource in animation.
<SolidColorBrush x:Key="TextBoxErrorThemeBrush" Color="Red" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="PART_TextBlock">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource TextBoxErrorThemeBrush}"/>
</ObjectAnimationUsingKeyFrames>
Regards,
Jessie
In the Full screen Landscape view, I have a Gridview control to display data, I want to convert the Gridview to Listview when change the view to snapped, after researching for a long time, still doesn't find a article or a thread to introduce this. Anyone can help?
have your see the windows 8 app store sample in vs2012 (GroupedItemsPage.xaml) .?
<VisualStateManager.VisualStateGroups>
<!-- Visual states reflect the application's view state -->
<VisualStateGroup x:Name="ApplicationViewStates">
<VisualState x:Name="FullScreenLandscape"/>
<VisualState x:Name="Filled"/>
<!-- The entire page respects the narrower 100-pixel margin convention for portrait -->
<VisualState x:Name="FullScreenPortrait">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" Storyboard.TargetProperty="Style">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PortraitBackButtonStyle}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemGridView" Storyboard.TargetProperty="Padding">
<DiscreteObjectKeyFrame KeyTime="0" Value="96,137,10,56"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<!--
The back button and title have different styles when snapped, and the list representation is substituted
for the grid displayed in all other view states
-->
<VisualState x:Name="Snapped">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" Storyboard.TargetProperty="Style">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SnappedBackButtonStyle}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="pageTitle" Storyboard.TargetProperty="Style">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SnappedPageHeaderTextStyle}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemListView" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Visible"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemGridView" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
I'm trying to plan an mvvm based infrastructure, i decided that the view will be bounded directly to the entities through the vm. (the vm will hold the entity reference, and binding will be o entity.propertyName...)
now i got a problem, when user start editing fields in one view, i wanna lock(make readonly) all other view that bound to the entity being under edit.
so my question is:
what changes do i need to do in my design for having the ability to know who(what view) started editing first, and when he finished.. and how to know about changed that came not from the ui(for not locking anything)
First you'll have to define exactly what it means for user to be "editing" an entity.
What action on the user's part signals they are beginning to edit an entity? Clearly when someone types something in a TextBox bound to a model field they are editing the entity. But what if someone clicks a button in the view that clears a property value in the model or sets it to a predefined value. Is that considered "editing" the entity? What if they change the settings of the view so that it shows fewer options and a ComboBox switches the value in the model to a new value because the old value is no longer listed?
What action on the user's part signals they are done editing an entity? Are they done when the focus leaves the control they are on? When the focus leaves the view? When they click "Ok" or "Save"?
Depending on the answers to these questions, several simple solutions present themselves. I'll explain one simple answer. If it doesn't apply please clarify the answers to the above questions.
Supposing:
Any change made to a model object except a data refresh from the database is considered editing, whether it be done with a button, checkbox, etc
The view that contains the focus is considered to be the one who is making the change
"Editing" ends when the view loses focus or the user saves the data.
Then the following will work:
Add a "Reloading" property either as a static property or somewhere within your model
In your data reloading code, set this property "true" and in a finally block set it "false" again
In your model object (or in a data structure shared between your view models and mapped from the model using a weak dictionary), add a property that contains the view model of the view that is currently editing the entity
In your view, add a PropertyChanged handler to your model object when the view model is attached
In the handler, if: a. The Reloading flag is false, b. No view is currently editing the entity, and c. This view's IsKeyboardFocusWithin is true, then record the fact that this view is currently editing the entity
In every view model, attach a handler to the "CurrentlyEditorView" property mentioned in step 3 (either directly or through the separate data structure). Whenever this propety changed, if it is non-null and not the current view model, set an inherited "Locked" property causing the view to lock.
In the view, add a LostFocus event handler that checks if the model's current view is this one, and if so clears it.
Also add a handler for the Save command that does the same thing.
It would really depend on your program structure. I have some similar requirements and I did this in my primaryshell view...
<Grid wpfi:VisualStateAssistant.CurrentVisualState="{Binding Path=CurrentVisualState}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="640" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="480" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="ActiveFormStateGroup">
<VisualStateGroup.Transitions>
</VisualStateGroup.Transitions>
<VisualState x:Name="Searching">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="SearchHeaderView">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="SearchNavigationView">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="SearchResultsView">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="DoctorsModuleShell">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="DoctorsModuleNavigationView">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="DoctorEdit">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="SearchHeaderView">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="SearchNavigationView">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="SearchResultsView">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="DoctorsModuleShell">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="DoctorsModuleNavigationView">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="VisualAlertsStateGroup">
<VisualStateGroup.Transitions>
</VisualStateGroup.Transitions>
<VisualState x:Name="DialogShowing">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="rectangle">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="DialogNotShowing">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="rectangle">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="IsWaiting">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="rectangle">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="WaitControl">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="IsNotWaiting">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="rectangle">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="WaitControl">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="DialogFormsStateGroup">
<VisualStateGroup.Transitions>
</VisualStateGroup.Transitions>
<VisualState x:Name="ShowContactInfoEdit">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="rectangle">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="ContactInfoDatagridView">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="HideContactInfoEdit">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="rectangle">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="ContactInfoDatagridView">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="ShowDoctorTaxonomyEdit">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="rectangle">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="DoctorsTaxonomyEditView">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="HideDoctorTaxonomyEdit">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="rectangle">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="DoctorsTaxonomyEditView">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<DockPanel Grid.Column="0"
Grid.Row="0"
Grid.ColumnSpan="3"
Grid.RowSpan="3">
<!--TOP-->
<Grid ShowGridLines="False"
DockPanel.Dock="Top">
<views:SearchHeaderView x:Name="SearchHeaderView" />
</Grid>
<!--BOTTOM-->
<Grid ShowGridLines="false"
DockPanel.Dock="Bottom">
<views:SearchNavigationView x:Name="SearchNavigationView" />
<views:DoctorsModuleNavigationView x:Name="DoctorsModuleNavigationView"
Visibility="Collapsed" />
</Grid>
<!--FILL-->
<Grid ShowGridLines="False">
<views:SearchResultsView x:Name="SearchResultsView" />
<views:DoctorsModuleShell x:Name="DoctorsModuleShell"
Visibility="Collapsed" />
</Grid>
</DockPanel>
<Rectangle x:Name="rectangle"
RadiusX="2"
RadiusY="2"
Grid.Column="0"
Grid.Row="0"
Grid.ColumnSpan="3"
Grid.RowSpan="3"
Fill="{StaticResource modalFormHitTestRectangleBrush}"
IsHitTestVisible="True"
Visibility="Collapsed" />
<controls:WaitingControl x:Name="WaitControl"
Width="100"
Height="100"
Visibility="Collapsed"
Grid.Column="1"
Grid.Row="1" />
<views:ContactInfoDatagridView x:Name="ContactInfoDatagridView"
Grid.Column="1"
Grid.Row="1"
Visibility="Collapsed" />
<views:DoctorsTaxonomyEditView x:Name="DoctorsTaxonomyEditView"
Grid.Column="1"
Grid.Row="1"
Visibility="Collapsed" />
</Grid>
Basically I databound my visualstatemanager to a property on my primary viewmodel that would trigger various visual states depending on an enum I created. I got the best help for doing that from Karl Shifflets Stuff Application.
An option would be to use an EventAggegator or use the Mediator pattern to alert other view models that a particular entity instance is under edit. Those viewmodels can set a property IsReadonly = true which can be bound in xaml to make the controls readonly.
Just rasie an out of edit event to tell those viewmodels that it is no longer in reaonly mode.
If you are binding directly to the entity it should be implementing INotifyPropertyChanged which your view model can listen to in order to detect the first edit taking place.
HTH