Hacer (crear) vistas dinámicas reutilizables
Nuestro equipo quiere crear vistas reutilizables y estables. Por ejemplo, queremos reutilizar en diferentes aplicaciones lasCommonPromptView (nuestro propio cuadro de diálogo personalizable donde podemos ocultar el botón "Cancelar", establecer el encabezado, mostrar el ícono específico, etc.).
Esa vista tiene varios elementos en su superficie: TextBlocks, Buttons. Queremos hacerlos estables a.
Bueno, ¿cuál es el mejor enfoque para resolver esta tarea?
La vista puede ser de tipo ventana.La vista puede ser de tipo UserControl.En el primer caso, el estilo puede ser soportado de dos maneras:
Los estilos de elementos tienen referencias a DynamicResources.Los estilos se pasan al constructor de una vista.Los dos no están limpios (en mi opinión).
Pero si una Vista es un UserControl, entonces cada vez que alguien que crea una aplicación nueva tiene que crear una nueva Ventana para contener un UserControl y establecer sus enlaces a los DP (del tipo de Estilo) correctamente. Además, si un UserControl tiene su propia API muy conveniente (métodos estáticos para las operaciones más utilizadas), se perderá para el usuario de la ventana que contiene el UserControl.
Update
Ejemplo deCommonPromptView implementado como un UserControl.
Code-behind
public sealed partial class CommonPromptView {
private const int CloseViewTimeIntervalInMilliseconds = 120000;
private DispatcherTimer timer;
public static readonly DependencyProperty CommonPromptBorderStyleProperty = DependencyProperty.Register(
"CommonPromptBorderStyle", typeof (Style), typeof (CommonPromptView), new PropertyMetadata(default(Style)));
public Style CommonPromptBorderStyle {
get { return (Style) GetValue(CommonPromptBorderStyleProperty); }
set { SetValue(CommonPromptBorderStyleProperty, value); }
}
public static readonly DependencyProperty CommonPromptHeaderStyleProperty = DependencyProperty.Register(
"CommonPromptHeaderStyle", typeof (Style), typeof (CommonPromptView), new PropertyMetadata(default(Style)));
public Style CommonPromptHeaderStyle {
get { return (Style) GetValue(CommonPromptHeaderStyleProperty); }
set { SetValue(CommonPromptHeaderStyleProperty, value); }
}
public static readonly DependencyProperty CommonPromptMessageStyleProperty = DependencyProperty.Register(
"CommonPromptMessageStyle", typeof (Style), typeof (CommonPromptView), new PropertyMetadata(default(Style)));
public Style CommonPromptMessageStyle {
get { return (Style) GetValue(CommonPromptMessageStyleProperty); }
set { SetValue(CommonPromptMessageStyleProperty, value); }
}
public static readonly DependencyProperty CommonPromptSpitterStyleProperty = DependencyProperty.Register(
"CommonPromptSpitterStyle", typeof (Style), typeof (CommonPromptView), new PropertyMetadata(default(Style)));
public Style CommonPromptSpitterStyle {
get { return (Style) GetValue(CommonPromptSpitterStyleProperty); }
set { SetValue(CommonPromptSpitterStyleProperty, value); }
}
public static readonly DependencyProperty CommonPromptButtonStyleProperty = DependencyProperty.Register(
"CommonPromptButtonStyle", typeof (Style), typeof (CommonPromptView), new PropertyMetadata(default(Style)));
public Style CommonPromptButtonStyle {
get { return (Style) GetValue(CommonPromptButtonStyleProperty); }
set { SetValue(CommonPromptButtonStyleProperty, value); }
}
[SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
public CommonPromptView(object header = null, string message = "Вы действительно хотите продолжить?",
Visibility headerVisibility = Visibility.Collapsed,
MessageBoxIconWPF iconType = MessageBoxIconWPF.Question,
object affirmButtonContent = null, object cancelButtonContent = null,
Visibility cancelButtonVisibility = Visibility.Visible, Visibility affirmButtonVisibility = Visibility.Visible) {
InitializeComponent();
Header.Content = header ?? string.Empty;
if (header == null)
HeaderSplitter.Visibility = Visibility.Collapsed;
Message.Content = message;
Ok.Content = affirmButtonContent ?? "ОК";
Cancel.Content = cancelButtonContent ?? "Отмена";
Cancel.Visibility = cancelButtonVisibility;
Header.Visibility = headerVisibility;
Ok.Visibility = affirmButtonVisibility;
BitmapImage icon = new BitmapImage();
icon.BeginInit();
icon.UriSource = new Uri(GetIconPath(iconType));
//new Uri("pack://application:,,,/ApplicationName;component/Resources/logo.png");
icon.EndInit();
Icon.Source = icon;
SetTimer();
}
private static string GetIconPath(MessageBoxIconWPF icon) {
const string uri = "pack://application:,,,/Microtech.WPF.Common;component/";
string iconName;
switch (icon) {
case MessageBoxIconWPF.Error:
iconName = "CustomDialogStop";
break;
case MessageBoxIconWPF.Information:
iconName = "CustomDialogInformation";
break;
case MessageBoxIconWPF.Question:
iconName = "CustomDialogQuestion";
break;
case MessageBoxIconWPF.Warning:
iconName = "CustomDialogWarning";
break;
default:
throw new ArgumentException("There were no such an image");
}
return uri + string.Format("Images/{0}.{1}", iconName, "png");
}
public CommonPromptView(string content, Visibility cancelButtonVisibility = Visibility.Visible)
: this(message: content, cancelButtonVisibility: cancelButtonVisibility) {
}
private void SetTimer() {
TimeSpan timerInterval = TimeSpan.FromMilliseconds(CloseViewTimeIntervalInMilliseconds);
timer = new DispatcherTimer(timerInterval, DispatcherPriority.ApplicationIdle,
(obj, e) => Cancel_Click(null, null),
Dispatcher.CurrentDispatcher);
timer.Start();
}
public CommonPromptView() {
InitializeComponent();
}
public static bool PromptOnUserAgreement(string header, string message, string okText = "Да",
string cancelText = "Нет") {
return new CommonPromptView(header,
message, Visibility.Visible, MessageBoxIconWPF.Information, okText, cancelText).ShowDialog()
.GetValueOrDefault();
}
public static void PromptOnWarning(string header, string message) {
new CommonPromptView(header, message, headerVisibility: Visibility.Visible, iconType: MessageBoxIconWPF.Warning,
cancelButtonVisibility: Visibility.Collapsed).ShowDialog();
}
public static void PromptOnError(string header, string message) {
new CommonPromptView(header, message, headerVisibility: Visibility.Visible, iconType: MessageBoxIconWPF.Error,
cancelButtonVisibility: Visibility.Collapsed).ShowDialog();
}
public static void PromptOnSuccess(string header, string message) {
new CommonPromptView(header, message, headerVisibility: Visibility.Visible,
iconType: MessageBoxIconWPF.Information,
cancelButtonVisibility: Visibility.Collapsed).ShowDialog();
}
private void Ok_Click(object sender, RoutedEventArgs e) {
StopTimer();
TryCloseTheWindow(true);
}
private void Cancel_Click(object sender, RoutedEventArgs e) {
StopTimer();
TryCloseTheWindow(false);
}
private void TryCloseTheWindow(bool dialogResult) {
Window parentwin = GetWindow(this);
if (parentwin != null) {
try {
parentwin.DialogResult = dialogResult;
} catch (InvalidOperationException) {
}
parentwin.Close();
}
}
private void StopTimer() {
if (timer != null) {
timer.Stop();
timer = null;
}
}
}
XAML
<UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="Microtech.WPF.Common.CommonPromptView"
Background="Transparent"
DataContext="{Binding RelativeSource={RelativeSource Self}}">
<UserControl.Resources>
<Style x:Key="DefaultViewStyle" TargetType="Window">
<Setter Property="ResizeMode" Value="NoResize" />
<Setter Property="ShowInTaskbar" Value="False" />
<Setter Property="WindowStyle" Value="None" />
<Setter Property="WindowState" Value="Normal" />
<Setter Property="SizeToContent" Value="WidthAndHeight" />
<Setter Property="Topmost" Value="True" />
<Setter Property="Cursor" Value="Arrow" />
</Style>
<Style x:Key="DefaultHeaderStyle" TargetType="Label">
<Setter Property="Margin" Value="10,5,5,5"/>
<Setter Property="HorizontalAlignment" Value="Left" />
<Setter Property="VerticalAlignment" Value="Center" />
<Setter Property="FontSize" Value="20" />
<Setter Property="FontWeight" Value="Bold" />
</Style>
<Style x:Key="DefaultBorderStyle" TargetType="Border">
<Setter Property="Background" Value="#ADAAAD"/>
<Setter Property="BorderBrush" Value="Black" />
<Setter Property="Padding" Value="10" />
<Setter Property="BorderThickness" Value="3"/>
<Setter Property="CornerRadius" Value="10"/>
</Style>
<Style x:Key="DefaultMessageStyle" TargetType="Label">
<Setter Property="Margin" Value="10"/>
<Setter Property="FontSize" Value="14"/>
<Setter Property="FontFamily" Value="Verdana"/>
<Setter Property="FontWeight" Value="Normal"/>
</Style>
<Style x:Key="DefaultSplitterStyle" TargetType="GridSplitter">
<Setter Property="HorizontalAlignment" Value="Stretch" />
<Setter Property="VerticalAlignment" Value="Bottom" />
<Setter Property="BorderThickness" Value="0.65" />
<Setter Property="BorderBrush" Value="Black" />
<Setter Property="IsEnabled" Value="False" />
</Style>
<Style x:Key="FStandartButton" TargetType="{x:Type Button}">
<Setter Property="Background" Value="{x:Null}" />
<Setter Property="BorderBrush" Value="#00000000" />
<Setter Property="Foreground" Value="White" />
<Setter Property="VerticalContentAlignment" Value="Center" />
<Setter Property="Height" Value="Auto" />
<Setter Property="MinHeight" Value="55" />
<Setter Property="Width" Value="420" />
<Setter Property="Margin" Value="5" />
<Setter Property="Padding" Value="10" />
<Setter Property="FontSize" Value="22" />
<Setter Property="FontWeight" Value="Bold" />
<Setter Property="FocusVisualStyle" Value="{x:Null}" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Border x:Name="border" BorderBrush="#FF000000" BorderThickness="1,1,1,1" CornerRadius="4,4,4,4">
<Border.Background>
<LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
<GradientStop Offset="0" Color="#8C8A8C" />
<GradientStop Offset="1" Color="#636163" />
</LinearGradientBrush>
</Border.Background>
<ContentPresenter Name="ContentContainer"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
RecognizesAccessKey="True"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsPressed" Value="True">
<Setter TargetName="border" Property="Background" Value="#CC000000" />
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Foreground" Value="Gray" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="DefaultButtonStyle" TargetType="Button" BasedOn="{StaticResource FStandartButton}">
<Setter Property="FontFamily" Value="Verdana"/>
<Setter Property="FontSize" Value="14"/>
<Setter Property="Margin" Value="6"/>
</Style>
</UserControl.Resources>
<Border Style="{Binding CommonPromptBorderStyle, TargetNullValue={StaticResource DefaultBorderStyle}}">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Label x:Name="Header"
Style="{Binding CommonPromptHeaderStyle, TargetNullValue={StaticResource DefaultHeaderStyle}}" />
<GridSplitter x:Name="HeaderSplitter" Grid.Row="0"
Style="{Binding CommonPromptSpitterStyle, TargetNullValue={StaticResource DefaultSplitterStyle}}"
/>
<StackPanel Grid.Row="1" Margin="5,10,5,0" Orientation="Horizontal">
<Image x:Name="Icon" Width="32" Height="32" Margin="5"
HorizontalAlignment="Left"
VerticalAlignment="Center" />
<Label x:Name="Message"
Style="{Binding CommonPromptMessageStyle,
TargetNullValue={StaticResource DefaultMessageStyle}}" />
</StackPanel>
<StackPanel Grid.Row="2" HorizontalAlignment="Center" Orientation="Horizontal">
<Button x:Name="Ok"
Style="{Binding CommonPromptButtonStyle, TargetNullValue={StaticResource DefaultButtonStyle}}"
Click="Ok_Click" />
<Button x:Name="Cancel"
Style="{Binding CommonPromptButtonStyle, TargetNullValue={StaticResource DefaultButtonStyle}}"
IsDefault="True" Click="Cancel_Click" />
</StackPanel>
</Grid>
</Border>