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Estilos e modelos do ProgressBar

  • Artigo

Este tópico descreve os estilos e modelos do controle ProgressBar. Você pode modificar o ControlTemplate padrão para dar ao controle uma aparência exclusiva. Para obter mais informações, consulte Criar um modelo para um controle.

Partes do ProgressBar

A tabela a seguir lista as partes nomeadas para o controle ProgressBar.

Parte Tipo Descrição
PART_Indicator FrameworkElement O objeto que indica o progresso.
PART_Track FrameworkElement O objeto que define o caminho do indicador de progresso.
PART_GlowRect FrameworkElement Um objeto que embeleza a barra de progresso.

Estados da Barra de Progresso

A tabela a seguir lista os estados visuais do controle ProgressBar.

Nome do VisualState Nome do VisualStateGroup Descrição
Determinado Estados Comuns ProgressBar relata o progresso com base na propriedade Value.
Indeterminado CommonStates ProgressBar relata o progresso genérico com um padrão recorrente.
Válido Estados de Validação O controle usa a classe Validation e a propriedade anexada Validation.HasError é false.
FocoInválido EstadosDeValidação A propriedade anexada Validation.HasError é true tem o controle como foco.
InválidoNãoFocado Estados de Validação A propriedade anexada Validation.HasError é aquela onde o controle true não tem foco.

Exemplo de ProgressBar ControlTemplate

O exemplo a seguir mostra como definir um ControlTemplate para o controle ProgressBar.

<Style x:Key="{x:Type ProgressBar}"
       TargetType="{x:Type ProgressBar}">
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type ProgressBar}">
        <Grid MinHeight="14"
              MinWidth="200"
              Background="{TemplateBinding Background}">
          <VisualStateManager.VisualStateGroups>
            <VisualStateGroup x:Name="CommonStates">
              <VisualState x:Name="Determinate" />
              <VisualState x:Name="Indeterminate">
                <Storyboard>
                  <ObjectAnimationUsingKeyFrames Duration="00:00:00"
                                                 Storyboard.TargetName="PART_Indicator"
                                                 Storyboard.TargetProperty="Background">
                    <DiscreteObjectKeyFrame KeyTime="00:00:00">
                      <DiscreteObjectKeyFrame.Value>
                        <SolidColorBrush>Transparent</SolidColorBrush>
                      </DiscreteObjectKeyFrame.Value>
                    </DiscreteObjectKeyFrame>
                  </ObjectAnimationUsingKeyFrames>

                </Storyboard>
              </VisualState>
            </VisualStateGroup>
          </VisualStateManager.VisualStateGroups>
          <Border x:Name="PART_Track"
                  CornerRadius="2"
                  BorderThickness="1">
            <Border.BorderBrush>
              <SolidColorBrush Color="{DynamicResource BorderMediumColor}" />
            </Border.BorderBrush>
          </Border>
          <Border x:Name="PART_Indicator"
                  CornerRadius="2"
                  BorderThickness="1"
                  HorizontalAlignment="Left"
                  Background="{TemplateBinding Foreground}"
                  Margin="0,-1,0,1">
            <Border.BorderBrush>
              <LinearGradientBrush StartPoint="0,0"
                                   EndPoint="0,1">
                <GradientBrush.GradientStops>
                  <GradientStopCollection>
                    <GradientStop Color="{DynamicResource BorderLightColor}"
                                  Offset="0.0" />
                    <GradientStop Color="{DynamicResource BorderMediumColor}"
                                  Offset="1.0" />
                  </GradientStopCollection>
                </GradientBrush.GradientStops>
              </LinearGradientBrush>

            </Border.BorderBrush>
            <Grid ClipToBounds="True"
                  x:Name="Animation">
              <Rectangle x:Name="PART_GlowRect"
                         Width="100"
                         HorizontalAlignment="Left"
                         Fill="{DynamicResource ProgressBarIndicatorAnimatedFill}"
                         Margin="-100,0,0,0" />
            </Grid>
          </Border>
        </Grid>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
  <Setter Property="Background">
    <Setter.Value>
      <LinearGradientBrush EndPoint="0,1"
                           StartPoint="0,0">
        <GradientStop Color="{DynamicResource ControlLightColor}"
                      Offset="0" />
        <GradientStop Color="{DynamicResource ControlMediumColor}"
                      Offset="1" />
      </LinearGradientBrush>
    </Setter.Value>
  </Setter>
  <Setter Property="Foreground">
    <Setter.Value>
      <LinearGradientBrush EndPoint="0.5,1"
                           StartPoint="0.5,0">
        <GradientStop Color="{DynamicResource ControlMediumColor}"
                      Offset="0" />
        <GradientStop Color="{DynamicResource ControlDarkColor}"
                      Offset="1" />
      </LinearGradientBrush>
    </Setter.Value>
  </Setter>
</Style>

O exemplo anterior usa um ou mais dos recursos a seguir.

<!--Control colors.-->
<Color x:Key="WindowColor">#FFE8EDF9</Color>
<Color x:Key="ContentAreaColorLight">#FFC5CBF9</Color>
<Color x:Key="ContentAreaColorDark">#FF7381F9</Color>

<Color x:Key="DisabledControlLightColor">#FFE8EDF9</Color>
<Color x:Key="DisabledControlDarkColor">#FFC5CBF9</Color>
<Color x:Key="DisabledForegroundColor">#FF888888</Color>

<Color x:Key="SelectedBackgroundColor">#FFC5CBF9</Color>
<Color x:Key="SelectedUnfocusedColor">#FFDDDDDD</Color>

<Color x:Key="ControlLightColor">White</Color>
<Color x:Key="ControlMediumColor">#FF7381F9</Color>
<Color x:Key="ControlDarkColor">#FF211AA9</Color>

<Color x:Key="ControlMouseOverColor">#FF3843C4</Color>
<Color x:Key="ControlPressedColor">#FF211AA9</Color>


<Color x:Key="GlyphColor">#FF444444</Color>
<Color x:Key="GlyphMouseOver">sc#1, 0.004391443, 0.002428215, 0.242281124</Color>

<!--Border colors-->
<Color x:Key="BorderLightColor">#FFCCCCCC</Color>
<Color x:Key="BorderMediumColor">#FF888888</Color>
<Color x:Key="BorderDarkColor">#FF444444</Color>

<Color x:Key="PressedBorderLightColor">#FF888888</Color>
<Color x:Key="PressedBorderDarkColor">#FF444444</Color>

<Color x:Key="DisabledBorderLightColor">#FFAAAAAA</Color>
<Color x:Key="DisabledBorderDarkColor">#FF888888</Color>

<Color x:Key="DefaultBorderBrushDarkColor">Black</Color>

<!--Control-specific resources.-->
<Color x:Key="HeaderTopColor">#FFC5CBF9</Color>
<Color x:Key="DatagridCurrentCellBorderColor">Black</Color>
<Color x:Key="SliderTrackDarkColor">#FFC5CBF9</Color>

<Color x:Key="NavButtonFrameColor">#FF3843C4</Color>

<LinearGradientBrush x:Key="MenuPopupBrush"
                     EndPoint="0.5,1"
                     StartPoint="0.5,0">
  <GradientStop Color="{DynamicResource ControlLightColor}"
                Offset="0" />
  <GradientStop Color="{DynamicResource ControlMediumColor}"
                Offset="0.5" />
  <GradientStop Color="{DynamicResource ControlLightColor}"
                Offset="1" />
</LinearGradientBrush>

<LinearGradientBrush x:Key="ProgressBarIndicatorAnimatedFill"
                     StartPoint="0,0"
                     EndPoint="1,0">
  <LinearGradientBrush.GradientStops>
    <GradientStopCollection>
      <GradientStop Color="#000000FF"
                    Offset="0" />
      <GradientStop Color="#600000FF"
                    Offset="0.4" />
      <GradientStop Color="#600000FF"
                    Offset="0.6" />
      <GradientStop Color="#000000FF"
                    Offset="1" />
    </GradientStopCollection>
  </LinearGradientBrush.GradientStops>
</LinearGradientBrush>

Para obter o exemplo completo, consulte Estilo com ode Exemplo ControlTemplates.

Consulte também