稳扎稳打Silverlight(42) - 4.0控件之Viewbox, RichTextBox
2011-11-28 16:09
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[源码下载]
稳扎稳打Silverlight(42) - 4.0控件之Viewbox, RichTextBox
作者：webabcd
介绍
Silverlight
4.0 控件一览：
Viewbox - 一个容器控件，其内只能有一个子元素。Viewbox 可以决定其内的子元素如何拉伸、缩放、对齐
RichTextBox - 编辑器。用于显示或编辑文本、超链、图片、UI元素等
在线DEMO
/article/4589659.html
示例
1、Viewbox
的 Demo
ViewboxDemo.xaml
代码
<navigation:Page x:Class="Silverlight40.Control.ViewboxDemo"
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:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
Title="ViewboxDemo Page">
<Grid x:Name="LayoutRoot" Background="White">
<StackPanel Background="AntiqueWhite" HorizontalAlignment="Left">
<!-- 用于演示 Viewbox.Stretch 属性 -->
<StackPanel Margin="5" Width="200">
<TextBlock Text="Stretch" />
<Button Name="btn1" Click="stretchNone" Content="None" />
<Button Name="btn2" Click="stretchFill" Content="Fill" />
<Button Name="btn3" Click="stretchUniform" Content="Uniform" />
<Button Name="btn4" Click="stretchUniformToFill" Content="UniformToFill" />
</StackPanel>
<!-- 用于演示 Viewbox.StretchDirection 属性 -->
<StackPanel Margin="5" Width="200">
<TextBlock Text="StretchDirection" />
<Button Name="btn5" Click="stretchDirectionUpOnly" Content="UpOnly" />
<Button Name="btn6" Click="stretchDirectionDownOnly" Content="DownOnly" />
<Button Name="btn7" Click="stretchDirectionBoth" Content="Both" />
</StackPanel>
<!-- 用于演示 Viewbox.HorizontalAlignment 属性 -->
<StackPanel Margin="5" Width="200">
<TextBlock Text="HorizontalAlignment" />
<Button Name="btn8" Click="horizontalAlignmentCenter" Content="Center" />
<Button Name="btn9" Click="horizontalAlignmentLeft" Content="Left" />
<Button Name="btn10" Click="horizontalAlignmentRight" Content="Right" />
<Button Name="btn11" Click="horizontalAlignmentStretch" Content="Stretch" />
</StackPanel>
<!-- 用于演示 Viewbox.VerticalAlignment 属性 -->
<StackPanel Margin="5" Width="200">
<TextBlock Text="VerticalAlignment" />
<Button Name="btn12" Click="verticalAlignmentCenter" Content="Center" />
<Button Name="btn13" Click="verticalAlignmentTop" Content="Top" />
<Button Name="btn14" Click="verticalAlignmentBottom" Content="Bottom" />
<Button Name="btn15" Click="verticalAlignmentStretch" Content="Stretch" />
</StackPanel>
<!-- 用于显示当前 Viewbox 的 Stretch 值，StretchDirection 值，HorizontalAlignment 值，VerticalAlignment 值 -->
<StackPanel Margin="5">
<TextBlock Name="lblMsg" />
</StackPanel>
<!-- 用于演示 Viewbox 的各种效果 -->
<StackPanel Width="500" Height="300" Background="Black">
<Viewbox Name="viewbox" Width="500" Height="300">
<!-- 注：Viewbox 内只能有一个子元素 -->
<Image Source="/Resource/Logo.jpg" />
</Viewbox>
</StackPanel>
</StackPanel>
</Grid>
</navigation:Page>
ViewboxDemo.xaml.cs
代码
/*
* Viewbox - 一个容器控件，其内只能有一个子元素。Viewbox 可以决定其内的子元素如何拉伸、缩放、对齐
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Navigation;
namespace Silverlight40.Control
{
public partial class ViewboxDemo : Page
{
public ViewboxDemo()
{
InitializeComponent();
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
ShowResult();
}
// 用于显示当前 Viewbox 的 Stretch 值，StretchDirection 值，HorizontalAlignment 值，VerticalAlignment 值
private void ShowResult()
{
lblMsg.Text = string.Format("Stretch: {0}, StretchDirection: {1}, HorizontalAlignment: {2}, VerticalAlignment: {3}",
viewbox.Stretch.ToString(),
viewbox.StretchDirection.ToString(),
viewbox.HorizontalAlignment.ToString(),
viewbox.VerticalAlignment.ToString());
}
/*
* Viewbox.Stretch - 子元素在 Viewbox 内的拉伸模式 [System.Windows.Media.Stretch 枚举]
* Stretch.None - 不做处理。不做任何拉伸处理，填充内容保持原始大小
* Stretch.Fill - 充满。调整填充内容，以充满整个容器，填充内容比例变为容器比例
* Stretch.Uniform - 等比适应。调整填充内容，以适合容器尺寸，填充内容会做等比例调整（默认值）
* 如果填充内容与容器比例不一样，那么填充内容调整的结果为：
* 使得填充内容的宽与容器的宽相等，或者 填充内容的高与容器的高相等。填充内容会被完整显示
* Stretch.UniformToFill - 等比充满。调整填充内容，以适合容器尺寸，填充内容会做等比例调整
* 如果填充内容与容器比例不一样，那么填充内容调整的结果为：
* 使得填充内容的宽与容器的宽相等，并且 填充内容的高与容器的高相等。填充内容会被做相应的剪裁
*/
private void stretchNone(object sender, RoutedEventArgs e)
{
viewbox.Stretch = Stretch.None;
ShowResult();
}
private void stretchFill(object sender, RoutedEventArgs e)
{
viewbox.Stretch = Stretch.Fill;
ShowResult();
}
private void stretchUniform(object sender, RoutedEventArgs e)
{
viewbox.Stretch = Stretch.Uniform;
ShowResult();
}
private void stretchUniformToFill(object sender, RoutedEventArgs e)
{
viewbox.Stretch = Stretch.UniformToFill;
ShowResult();
}
/*
* Viewbox.StretchDirection - 子元素在 Viewbox 内的缩放模式 [System.Windows.Controls.StretchDirection 枚举]
* StretchDirection.UpOnly - 当子元素小于 Viewbox 时，子元素会放大
* StretchDirection.DownOnly - 当子元素大于 Viewbox 时，子元素会缩小
* StretchDirection.Both - 不做任何处理（默认值）
*/
private void stretchDirectionUpOnly(object sender, RoutedEventArgs e)
{
viewbox.StretchDirection = StretchDirection.UpOnly;
ShowResult();
}
private void stretchDirectionDownOnly(object sender, RoutedEventArgs e)
{
viewbox.StretchDirection = StretchDirection.DownOnly;
ShowResult();
}
private void stretchDirectionBoth(object sender, RoutedEventArgs e)
{
viewbox.StretchDirection = StretchDirection.Both;
ShowResult();
}
/*
* Viewbox.HorizontalAlignment - 子元素在 Viewbox 内的水平方向的对齐模式 [System.Windows.HorizontalAlignment 枚举]
* Center, Left, Right, Stretch（默认值）
*/
private void horizontalAlignmentCenter(object sender, RoutedEventArgs e)
{
viewbox.HorizontalAlignment = HorizontalAlignment.Center;
ShowResult();
}
private void horizontalAlignmentLeft(object sender, RoutedEventArgs e)
{
viewbox.HorizontalAlignment = HorizontalAlignment.Left;
ShowResult();
}
private void horizontalAlignmentRight(object sender, RoutedEventArgs e)
{
viewbox.HorizontalAlignment = HorizontalAlignment.Right;
ShowResult();
}
private void horizontalAlignmentStretch(object sender, RoutedEventArgs e)
{
viewbox.HorizontalAlignment = HorizontalAlignment.Stretch;
ShowResult();
}
/*
* Viewbox.VerticalAlignment - 子元素在 Viewbox 内的垂直方向的对齐模式 [System.Windows.VerticalAlignment 枚举]
* Center, Top, Bottom, Stretch（默认值）
*/
private void verticalAlignmentCenter(object sender, RoutedEventArgs e)
{
viewbox.VerticalAlignment = VerticalAlignment.Center;
ShowResult();
}
private void verticalAlignmentTop(object sender, RoutedEventArgs e)
{
viewbox.VerticalAlignment = VerticalAlignment.Top;
ShowResult();
}
private void verticalAlignmentBottom(object sender, RoutedEventArgs e)
{
viewbox.VerticalAlignment = VerticalAlignment.Bottom;
ShowResult();
}
private void verticalAlignmentStretch(object sender, RoutedEventArgs e)
{
viewbox.VerticalAlignment = VerticalAlignment.Stretch;
ShowResult();
}
}
}
2、RichTextBox
的 Demo
RichTextBoxDemo.xaml
代码
<navigation:Page x:Class="Silverlight40.Control.RichTextBoxDemo"
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:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
Title="RichTextBoxDemo Page">
<StackPanel HorizontalAlignment="Left">
<StackPanel Background="AntiqueWhite" Orientation="Horizontal">
<ComboBox x:Name="cmbFontSize" FontSize="{Binding SelectedItem.FontSize, RelativeSource={RelativeSource Self}}" SelectionChanged="cmbFontSize_SelectionChanged">
<ComboBoxItem Content="16" Tag="16" FontSize="16" IsSelected="True" />
<ComboBoxItem Content="48" Tag="48" FontSize="48" />
</ComboBox>
<ComboBox x:Name="cmbFontFamily" FontFamily="{Binding SelectedItem.FontFamily, RelativeSource={RelativeSource Self}}" SelectionChanged="cmbFontFamily_SelectionChanged">
<ComboBoxItem Content="Arial" Tag="Arial" FontFamily="Arial" IsSelected="True" />
<ComboBoxItem Content="Verdana" Tag="Verdana" FontFamily="Verdana" />
</ComboBox>
<Button Name="btnBold" Content="加粗" Click="btnBold_Click" />
<Button Name="btnItalic" Content="斜体" Click="btnItalic_Click" />
<Button Name="btnUnderline" Content="下划线" Click="btnUnderline_Click" />
<Button Name="btnHyperlink" Content="插入超级链接的 Demo" Click="btnHyperlink_Click" />
<Button Name="btnUIElement" Content="插入 UIElement 的 Demo" Click="btnUIElement_Click" />
<ToggleButton Name="btnXaml" Content="xaml" Checked="btnXaml_Checked" Unchecked="btnXaml_Checked" />
<ToggleButton Name="btnPreview" Content="预览" Checked="btnPreview_Checked" Unchecked="btnPreview_Checked" />
<Button Name="btnTextPointerDemo" Content="TextPointer 的 Demo (将光标当前所在位置到文本结尾的文字全变为绿色)" Click="btnTextPointerDemo_Click" />
</StackPanel>
<Grid Width="600" Height="400">
<RichTextBox Name="richTextBox" VerticalScrollBarVisibility="Auto">
<Paragraph>
webabcd
</Paragraph>
<Paragraph>
<Span>webabcd</Span>
<LineBreak />
<Bold>webabcd</Bold>
<LineBreak />
<Italic>webabcd</Italic>
<LineBreak />
<Underline>webabcd</Underline>
<LineBreak />
<Run FontFamily="Arial" FontSize="20" FontStretch="Normal" FontStyle="Italic" FontWeight="Bold" Foreground="Red" TextDecorations="underline" Text="webabcd" />
<LineBreak />
<Hyperlink TargetName="_black" NavigateUri="http://webabcd.cnblogs.com/">webabcd</Hyperlink>
<LineBreak />
<InlineUIContainer>
<Image Source="/Resource/Logo.jpg" Height="100" Width="100" ToolTipService.ToolTip="我是提示" />
</InlineUIContainer>
</Paragraph>
</RichTextBox>
<TextBox Name="txtXaml" TextWrapping="Wrap" VerticalScrollBarVisibility="Auto" Visibility="Collapsed" />
</Grid>
<TextBlock Name="lblMsg" />
</StackPanel>
</navigation:Page>
RichTextBoxDemo.xaml.cs
代码
/*
* RichTextBox - 编辑器。用于显示或编辑文本、超链、图片、UI元素等
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Navigation;
using System.Windows.Media.Imaging;
namespace Silverlight40.Control
{
public partial class RichTextBoxDemo : Page
{
public RichTextBoxDemo()
{
InitializeComponent();
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
/*
* RichTextBox 的内容结构说明如下：
*
* Block - 抽象类。块级内容的基类
* Paragraph - 段落，包含一组内联元素。继承自 Block
* Inline - 抽象类。内联元素的基类
* Run - 文本。继承自 Inline
* LineBreak - 换行。继承自 Inline
* Span - 文本。继承自 Inline
* Hyperlink - 超链接。继承自 Span
* Bold - 加粗。继承自 Span
* Italic - 斜体。继承自 Span
* Underline - 下划线。继承自 Span
* InlineUIContainer - 用于承载 UIElement 类型的对象。继承自 Span
* TextElement - TextElement是 Inline 的基类，可以对其设置如下属性
* FontSize - 字体大小
* FontFamily - 字体名称
* Foreground - 字体颜色（因为 xaml 属性仅支持可以表示为一个字符串的属性值。所以这里只能使用 SolidColorBrush，而不能使用 LinearGradientBrush 之类的）
* FontWeight - 笔画粗细
* FontStyle - 是否斜体
* FontStretch - 字体的拉伸程度（需要字体支持）
*/
/*
* Paragraph.Inlines - 段落所包含的内联元素的集合
* RichTextBox.Blocks - RichTextBox 中的块级元素的集合
* RichTextBox.Xaml - RichTextBox 中的内容的 xaml 代码
*/
Bold bold = new Bold();
bold.Inlines.Add("web");
LineBreak lineBreak = new LineBreak();
Run run = new Run();
run.Text = "abcd";
Paragraph paragraph = new Paragraph();
paragraph.Inlines.Add(bold);
paragraph.Inlines.Add(lineBreak);
paragraph.Inlines.Add(run);
richTextBox.Blocks.Add(paragraph);
}
/*
* RichTextBox.Selection - 获取 RichTextBox 中的选中内容，返回一个 TextSelection 类型的对象
* TextSelection.ApplyPropertyValue(DependencyProperty formattingProperty, Object value) - 为选中的内容指定其格式的属性和值
* DependencyProperty formattingProperty - 格式的属性
* Object value - 格式的属性的值
* TextSelection.Text - 选中的内容中的纯文本内容
* TextSelection.Xaml - 选中的内容的 xaml 代码
* TextSelection.Insert() - 把当前选中的内容替换成指定的 TextElement
* 以下分别举例如何设置选中文本的字体大小、字体名称、加粗、斜体、下划线
*/
private void cmbFontSize_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (richTextBox != null && richTextBox.Selection.Text.Length > 0)
{
richTextBox.Selection.ApplyPropertyValue(Run.FontSizeProperty, double.Parse((cmbFontSize.SelectedItem as ComboBoxItem).Tag.ToString()));
}
}
private void cmbFontFamily_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (richTextBox != null && richTextBox.Selection.Text.Length > 0)
{
richTextBox.Selection.ApplyPropertyValue(Run.FontFamilyProperty, new FontFamily((cmbFontFamily.SelectedItem as ComboBoxItem).Tag.ToString()));
}
}
private void btnBold_Click(object sender, RoutedEventArgs e)
{
if (richTextBox.Selection.Text.Length > 0)
{
if (richTextBox.Selection.GetPropertyValue(Run.FontWeightProperty) is FontWeight && ((FontWeight)richTextBox.Selection.GetPropertyValue(Run.FontWeightProperty)) == FontWeights.Normal)
richTextBox.Selection.ApplyPropertyValue(Run.FontWeightProperty, FontWeights.Bold);
else
richTextBox.Selection.ApplyPropertyValue(Run.FontWeightProperty, FontWeights.Normal);
}
}
private void btnItalic_Click(object sender, RoutedEventArgs e)
{
if (richTextBox.Selection.Text.Length > 0)
{
if (richTextBox.Selection.GetPropertyValue(Run.FontStyleProperty) is FontStyle && ((FontStyle)richTextBox.Selection.GetPropertyValue(Run.FontStyleProperty)) == FontStyles.Normal)
richTextBox.Selection.ApplyPropertyValue(Run.FontStyleProperty, FontStyles.Italic);
else
richTextBox.Selection.ApplyPropertyValue(Run.FontStyleProperty, FontStyles.Normal);
}
}
private void btnUnderline_Click(object sender, RoutedEventArgs e)
{
if (richTextBox.Selection.Text.Length > 0)
{
if (richTextBox.Selection.GetPropertyValue(Run.TextDecorationsProperty) == null)
richTextBox.Selection.ApplyPropertyValue(Run.TextDecorationsProperty, TextDecorations.Underline);
else
richTextBox.Selection.ApplyPropertyValue(Run.TextDecorationsProperty, null);
}
}
/*
* TextSelection.Insert() - 把当前选中的内容替换成指定的 TextElement
* Hyperlink - 一个用于显示超链接的内联元素。Hyperlink继承自Span，Span继承自Inline，Inline继承自TextElement
* 以下举例如何插入超链接（要在 RichTextBox 使超链接有效，需要将 RichTextBox 设置为显示状态）
*/
private void btnHyperlink_Click(object sender, RoutedEventArgs e)
{
Hyperlink hyperlink = new Hyperlink();
hyperlink.TargetName = "_blank";
hyperlink.NavigateUri = new Uri("http://webabcd.cnblogs.com/");
hyperlink.Inlines.Add("webabcd blog");
richTextBox.Selection.Insert(hyperlink);
}
/*
* InlineUIContainer - 一个容器，可以承载任何 UIElement 类型的对象。InlineUIContainer继承自Inline
* 以下举例如何插入图片
*/
private void btnUIElement_Click(object sender, RoutedEventArgs e)
{
Image img = new Image();
img.Source = new BitmapImage(new Uri("/Resource/Logo.jpg", UriKind.Relative));
img.Width = 100;
img.Height = 100;
InlineUIContainer container = new InlineUIContainer();
container.Child = img;
richTextBox.Selection.Insert(container);
}
/*
* RichTextBox.Xaml - RichTextBox 中的内容的 xaml 代码
* 以下举例如何在“显示模式”和“代码模式”之间切换
*/
private void btnXaml_Checked(object sender, RoutedEventArgs e)
{
if (btnXaml.IsChecked.Value)
{
txtXaml.Text = richTextBox.Xaml;
txtXaml.Visibility = Visibility.Visible;
}
else
{
richTextBox.Xaml = txtXaml.Text;
txtXaml.Visibility = Visibility.Collapsed;
}
}
/*
* RichTextBox.IsReadOnly - 指定是否可以在 RichTextBox 中编辑内容
* true - 显示模式
* false - 编辑模式（此模式下可以通过快捷键的方式来支持撤销 Ctrl+Z 和重做 Ctrl+Y 操作）
* 以下举例如何预览 RichTextBox 中的内容（注：只有在显示模式中超链接才生效）
*/
private void btnPreview_Checked(object sender, RoutedEventArgs e)
{
richTextBox.IsReadOnly = btnPreview.IsChecked.Value;
}
private void btnTextPointerDemo_Click(object sender, RoutedEventArgs e)
{
/*
* TextPointer - 表示 RichTextBox 中的一个位置
* 插入位置（Insertion Position）的概念：
* TextPointer 出现在内容中的字符之间则为插入位置
* TextPointer 出现在定义内容结构的元素标记之间，则此位置不是插入位置。例如，两个相邻段落标记（即前一个段落的结束标记与下一个段落的开始标记）之间的位置就是一个有效的 TextPointer 位置，但不是插入位置
* TextPointer.CompareTo(TextPointer tp) - 当前 TextPointer 位于指定的 TextPointer 之前则为 -1，之后则为 1，相同则为 0
* TextPointer.IsAtInsertionPosition - 当前 TextPointer 是否是一个插入位置
* TextPointer.GetNextInsertionPosition(LogicalDirection direction) - 获取当前 TextPointer 的按指定的逻辑方向的下一个插入位置
* LogicalDirection - 逻辑方向 [System.Windows.Documents.LogicalDirection 枚举]
* LogicalDirection.Forward - 向前
* LogicalDirection.Backward - 向后
* TextPointer.GetPositionAtOffset(int offset, LogicalDirection direction) - 获取当前 TextPointer 的按指定的逻辑方向偏移了指定值的 TextPointer
* TextPointer.Parent - 包含当前 TextPointer 的容器。比如，文字的 Parent 是 run ；RichTextBox.ContentEnd 的 Parent 是 RichTextBox
*
* RichTextBox.ContentStart - RichTextBox 内容的开头的 TextPointer（肯定不是插入位置）
* RichTextBox.ContentEnd - RichTextBox 内容的结尾的 TextPointer（肯定不是插入位置）
* RichTextBox.GetPositionFromPoint(Point point) - 获取离指定 Point 最近的插入位置
* RichTextBox.Selection - 获取 RichTextBox 中的选中内容，返回一个 TextSelection 类型的对象
* TextSelection.Start - 选中内容的开头 TextPointer
* TextSelection.End - 选中内容的开头 TextPointer
* TextSelection.Select(TextPointer tp1, TextPointer tp2) - 指定两个 TextPointer 来更新选中内容
*
* 在 RichTextBox 中被视为一个符号的有：TextElement 的开始或结束标记；InlineUIContainer 中的 UIElement 元素；Run 中的字符
*/
// 将光标当前所在位置到文本结尾的文字全变为绿色
TextPointer currentPointer = richTextBox.Selection.Start;
TextPointer endPointer = richTextBox.ContentEnd.GetNextInsertionPosition(LogicalDirection.Backward);
richTextBox.Selection.Select(currentPointer, endPointer);
richTextBox.Selection.ApplyPropertyValue(Run.ForegroundProperty, Colors.Green);
// 将光标当前所在位置到文本结尾的文字信息输出到页面上
while (currentPointer.CompareTo(endPointer) == -1)
{
string currentChar = "";
TextPointer nextPointer = currentPointer.GetNextInsertionPosition(LogicalDirection.Forward);
if (nextPointer != null)
{
richTextBox.Selection.Select(currentPointer, nextPointer);
if (richTextBox.Selection.Text.Length != 0)
currentChar = richTextBox.Selection.Text;
}
lblMsg.Text += currentChar;
currentPointer = currentPointer.GetNextInsertionPosition(LogicalDirection.Forward);
}
}
}
}
OK
[源码下载]
稳扎稳打Silverlight(42) - 4.0控件之Viewbox, RichTextBox
作者：webabcd
介绍
Silverlight
4.0 控件一览：
Viewbox - 一个容器控件，其内只能有一个子元素。Viewbox 可以决定其内的子元素如何拉伸、缩放、对齐
RichTextBox - 编辑器。用于显示或编辑文本、超链、图片、UI元素等
在线DEMO
/article/4589659.html
示例
1、Viewbox
的 Demo
ViewboxDemo.xaml
代码
<navigation:Page x:Class="Silverlight40.Control.ViewboxDemo"
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:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
Title="ViewboxDemo Page">
<Grid x:Name="LayoutRoot" Background="White">
<StackPanel Background="AntiqueWhite" HorizontalAlignment="Left">
<!-- 用于演示 Viewbox.Stretch 属性 -->
<StackPanel Margin="5" Width="200">
<TextBlock Text="Stretch" />
<Button Name="btn1" Click="stretchNone" Content="None" />
<Button Name="btn2" Click="stretchFill" Content="Fill" />
<Button Name="btn3" Click="stretchUniform" Content="Uniform" />
<Button Name="btn4" Click="stretchUniformToFill" Content="UniformToFill" />
</StackPanel>
<!-- 用于演示 Viewbox.StretchDirection 属性 -->
<StackPanel Margin="5" Width="200">
<TextBlock Text="StretchDirection" />
<Button Name="btn5" Click="stretchDirectionUpOnly" Content="UpOnly" />
<Button Name="btn6" Click="stretchDirectionDownOnly" Content="DownOnly" />
<Button Name="btn7" Click="stretchDirectionBoth" Content="Both" />
</StackPanel>
<!-- 用于演示 Viewbox.HorizontalAlignment 属性 -->
<StackPanel Margin="5" Width="200">
<TextBlock Text="HorizontalAlignment" />
<Button Name="btn8" Click="horizontalAlignmentCenter" Content="Center" />
<Button Name="btn9" Click="horizontalAlignmentLeft" Content="Left" />
<Button Name="btn10" Click="horizontalAlignmentRight" Content="Right" />
<Button Name="btn11" Click="horizontalAlignmentStretch" Content="Stretch" />
</StackPanel>
<!-- 用于演示 Viewbox.VerticalAlignment 属性 -->
<StackPanel Margin="5" Width="200">
<TextBlock Text="VerticalAlignment" />
<Button Name="btn12" Click="verticalAlignmentCenter" Content="Center" />
<Button Name="btn13" Click="verticalAlignmentTop" Content="Top" />
<Button Name="btn14" Click="verticalAlignmentBottom" Content="Bottom" />
<Button Name="btn15" Click="verticalAlignmentStretch" Content="Stretch" />
</StackPanel>
<!-- 用于显示当前 Viewbox 的 Stretch 值，StretchDirection 值，HorizontalAlignment 值，VerticalAlignment 值 -->
<StackPanel Margin="5">
<TextBlock Name="lblMsg" />
</StackPanel>
<!-- 用于演示 Viewbox 的各种效果 -->
<StackPanel Width="500" Height="300" Background="Black">
<Viewbox Name="viewbox" Width="500" Height="300">
<!-- 注：Viewbox 内只能有一个子元素 -->
<Image Source="/Resource/Logo.jpg" />
</Viewbox>
</StackPanel>
</StackPanel>
</Grid>
</navigation:Page>
ViewboxDemo.xaml.cs
代码
/*
* Viewbox - 一个容器控件，其内只能有一个子元素。Viewbox 可以决定其内的子元素如何拉伸、缩放、对齐
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Navigation;
namespace Silverlight40.Control
{
public partial class ViewboxDemo : Page
{
public ViewboxDemo()
{
InitializeComponent();
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
ShowResult();
}
// 用于显示当前 Viewbox 的 Stretch 值，StretchDirection 值，HorizontalAlignment 值，VerticalAlignment 值
private void ShowResult()
{
lblMsg.Text = string.Format("Stretch: {0}, StretchDirection: {1}, HorizontalAlignment: {2}, VerticalAlignment: {3}",
viewbox.Stretch.ToString(),
viewbox.StretchDirection.ToString(),
viewbox.HorizontalAlignment.ToString(),
viewbox.VerticalAlignment.ToString());
}
/*
* Viewbox.Stretch - 子元素在 Viewbox 内的拉伸模式 [System.Windows.Media.Stretch 枚举]
* Stretch.None - 不做处理。不做任何拉伸处理，填充内容保持原始大小
* Stretch.Fill - 充满。调整填充内容，以充满整个容器，填充内容比例变为容器比例
* Stretch.Uniform - 等比适应。调整填充内容，以适合容器尺寸，填充内容会做等比例调整（默认值）
* 如果填充内容与容器比例不一样，那么填充内容调整的结果为：
* 使得填充内容的宽与容器的宽相等，或者 填充内容的高与容器的高相等。填充内容会被完整显示
* Stretch.UniformToFill - 等比充满。调整填充内容，以适合容器尺寸，填充内容会做等比例调整
* 如果填充内容与容器比例不一样，那么填充内容调整的结果为：
* 使得填充内容的宽与容器的宽相等，并且 填充内容的高与容器的高相等。填充内容会被做相应的剪裁
*/
private void stretchNone(object sender, RoutedEventArgs e)
{
viewbox.Stretch = Stretch.None;
ShowResult();
}
private void stretchFill(object sender, RoutedEventArgs e)
{
viewbox.Stretch = Stretch.Fill;
ShowResult();
}
private void stretchUniform(object sender, RoutedEventArgs e)
{
viewbox.Stretch = Stretch.Uniform;
ShowResult();
}
private void stretchUniformToFill(object sender, RoutedEventArgs e)
{
viewbox.Stretch = Stretch.UniformToFill;
ShowResult();
}
/*
* Viewbox.StretchDirection - 子元素在 Viewbox 内的缩放模式 [System.Windows.Controls.StretchDirection 枚举]
* StretchDirection.UpOnly - 当子元素小于 Viewbox 时，子元素会放大
* StretchDirection.DownOnly - 当子元素大于 Viewbox 时，子元素会缩小
* StretchDirection.Both - 不做任何处理（默认值）
*/
private void stretchDirectionUpOnly(object sender, RoutedEventArgs e)
{
viewbox.StretchDirection = StretchDirection.UpOnly;
ShowResult();
}
private void stretchDirectionDownOnly(object sender, RoutedEventArgs e)
{
viewbox.StretchDirection = StretchDirection.DownOnly;
ShowResult();
}
private void stretchDirectionBoth(object sender, RoutedEventArgs e)
{
viewbox.StretchDirection = StretchDirection.Both;
ShowResult();
}
/*
* Viewbox.HorizontalAlignment - 子元素在 Viewbox 内的水平方向的对齐模式 [System.Windows.HorizontalAlignment 枚举]
* Center, Left, Right, Stretch（默认值）
*/
private void horizontalAlignmentCenter(object sender, RoutedEventArgs e)
{
viewbox.HorizontalAlignment = HorizontalAlignment.Center;
ShowResult();
}
private void horizontalAlignmentLeft(object sender, RoutedEventArgs e)
{
viewbox.HorizontalAlignment = HorizontalAlignment.Left;
ShowResult();
}
private void horizontalAlignmentRight(object sender, RoutedEventArgs e)
{
viewbox.HorizontalAlignment = HorizontalAlignment.Right;
ShowResult();
}
private void horizontalAlignmentStretch(object sender, RoutedEventArgs e)
{
viewbox.HorizontalAlignment = HorizontalAlignment.Stretch;
ShowResult();
}
/*
* Viewbox.VerticalAlignment - 子元素在 Viewbox 内的垂直方向的对齐模式 [System.Windows.VerticalAlignment 枚举]
* Center, Top, Bottom, Stretch（默认值）
*/
private void verticalAlignmentCenter(object sender, RoutedEventArgs e)
{
viewbox.VerticalAlignment = VerticalAlignment.Center;
ShowResult();
}
private void verticalAlignmentTop(object sender, RoutedEventArgs e)
{
viewbox.VerticalAlignment = VerticalAlignment.Top;
ShowResult();
}
private void verticalAlignmentBottom(object sender, RoutedEventArgs e)
{
viewbox.VerticalAlignment = VerticalAlignment.Bottom;
ShowResult();
}
private void verticalAlignmentStretch(object sender, RoutedEventArgs e)
{
viewbox.VerticalAlignment = VerticalAlignment.Stretch;
ShowResult();
}
}
}
2、RichTextBox
的 Demo
RichTextBoxDemo.xaml
代码
<navigation:Page x:Class="Silverlight40.Control.RichTextBoxDemo"
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:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
Title="RichTextBoxDemo Page">
<StackPanel HorizontalAlignment="Left">
<StackPanel Background="AntiqueWhite" Orientation="Horizontal">
<ComboBox x:Name="cmbFontSize" FontSize="{Binding SelectedItem.FontSize, RelativeSource={RelativeSource Self}}" SelectionChanged="cmbFontSize_SelectionChanged">
<ComboBoxItem Content="16" Tag="16" FontSize="16" IsSelected="True" />
<ComboBoxItem Content="48" Tag="48" FontSize="48" />
</ComboBox>
<ComboBox x:Name="cmbFontFamily" FontFamily="{Binding SelectedItem.FontFamily, RelativeSource={RelativeSource Self}}" SelectionChanged="cmbFontFamily_SelectionChanged">
<ComboBoxItem Content="Arial" Tag="Arial" FontFamily="Arial" IsSelected="True" />
<ComboBoxItem Content="Verdana" Tag="Verdana" FontFamily="Verdana" />
</ComboBox>
<Button Name="btnBold" Content="加粗" Click="btnBold_Click" />
<Button Name="btnItalic" Content="斜体" Click="btnItalic_Click" />
<Button Name="btnUnderline" Content="下划线" Click="btnUnderline_Click" />
<Button Name="btnHyperlink" Content="插入超级链接的 Demo" Click="btnHyperlink_Click" />
<Button Name="btnUIElement" Content="插入 UIElement 的 Demo" Click="btnUIElement_Click" />
<ToggleButton Name="btnXaml" Content="xaml" Checked="btnXaml_Checked" Unchecked="btnXaml_Checked" />
<ToggleButton Name="btnPreview" Content="预览" Checked="btnPreview_Checked" Unchecked="btnPreview_Checked" />
<Button Name="btnTextPointerDemo" Content="TextPointer 的 Demo (将光标当前所在位置到文本结尾的文字全变为绿色)" Click="btnTextPointerDemo_Click" />
</StackPanel>
<Grid Width="600" Height="400">
<RichTextBox Name="richTextBox" VerticalScrollBarVisibility="Auto">
<Paragraph>
webabcd
</Paragraph>
<Paragraph>
<Span>webabcd</Span>
<LineBreak />
<Bold>webabcd</Bold>
<LineBreak />
<Italic>webabcd</Italic>
<LineBreak />
<Underline>webabcd</Underline>
<LineBreak />
<Run FontFamily="Arial" FontSize="20" FontStretch="Normal" FontStyle="Italic" FontWeight="Bold" Foreground="Red" TextDecorations="underline" Text="webabcd" />
<LineBreak />
<Hyperlink TargetName="_black" NavigateUri="http://webabcd.cnblogs.com/">webabcd</Hyperlink>
<LineBreak />
<InlineUIContainer>
<Image Source="/Resource/Logo.jpg" Height="100" Width="100" ToolTipService.ToolTip="我是提示" />
</InlineUIContainer>
</Paragraph>
</RichTextBox>
<TextBox Name="txtXaml" TextWrapping="Wrap" VerticalScrollBarVisibility="Auto" Visibility="Collapsed" />
</Grid>
<TextBlock Name="lblMsg" />
</StackPanel>
</navigation:Page>
RichTextBoxDemo.xaml.cs
代码
/*
* RichTextBox - 编辑器。用于显示或编辑文本、超链、图片、UI元素等
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Navigation;
using System.Windows.Media.Imaging;
namespace Silverlight40.Control
{
public partial class RichTextBoxDemo : Page
{
public RichTextBoxDemo()
{
InitializeComponent();
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
/*
* RichTextBox 的内容结构说明如下：
*
* Block - 抽象类。块级内容的基类
* Paragraph - 段落，包含一组内联元素。继承自 Block
* Inline - 抽象类。内联元素的基类
* Run - 文本。继承自 Inline
* LineBreak - 换行。继承自 Inline
* Span - 文本。继承自 Inline
* Hyperlink - 超链接。继承自 Span
* Bold - 加粗。继承自 Span
* Italic - 斜体。继承自 Span
* Underline - 下划线。继承自 Span
* InlineUIContainer - 用于承载 UIElement 类型的对象。继承自 Span
* TextElement - TextElement是 Inline 的基类，可以对其设置如下属性
* FontSize - 字体大小
* FontFamily - 字体名称
* Foreground - 字体颜色（因为 xaml 属性仅支持可以表示为一个字符串的属性值。所以这里只能使用 SolidColorBrush，而不能使用 LinearGradientBrush 之类的）
* FontWeight - 笔画粗细
* FontStyle - 是否斜体
* FontStretch - 字体的拉伸程度（需要字体支持）
*/
/*
* Paragraph.Inlines - 段落所包含的内联元素的集合
* RichTextBox.Blocks - RichTextBox 中的块级元素的集合
* RichTextBox.Xaml - RichTextBox 中的内容的 xaml 代码
*/
Bold bold = new Bold();
bold.Inlines.Add("web");
LineBreak lineBreak = new LineBreak();
Run run = new Run();
run.Text = "abcd";
Paragraph paragraph = new Paragraph();
paragraph.Inlines.Add(bold);
paragraph.Inlines.Add(lineBreak);
paragraph.Inlines.Add(run);
richTextBox.Blocks.Add(paragraph);
}
/*
* RichTextBox.Selection - 获取 RichTextBox 中的选中内容，返回一个 TextSelection 类型的对象
* TextSelection.ApplyPropertyValue(DependencyProperty formattingProperty, Object value) - 为选中的内容指定其格式的属性和值
* DependencyProperty formattingProperty - 格式的属性
* Object value - 格式的属性的值
* TextSelection.Text - 选中的内容中的纯文本内容
* TextSelection.Xaml - 选中的内容的 xaml 代码
* TextSelection.Insert() - 把当前选中的内容替换成指定的 TextElement
* 以下分别举例如何设置选中文本的字体大小、字体名称、加粗、斜体、下划线
*/
private void cmbFontSize_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (richTextBox != null && richTextBox.Selection.Text.Length > 0)
{
richTextBox.Selection.ApplyPropertyValue(Run.FontSizeProperty, double.Parse((cmbFontSize.SelectedItem as ComboBoxItem).Tag.ToString()));
}
}
private void cmbFontFamily_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (richTextBox != null && richTextBox.Selection.Text.Length > 0)
{
richTextBox.Selection.ApplyPropertyValue(Run.FontFamilyProperty, new FontFamily((cmbFontFamily.SelectedItem as ComboBoxItem).Tag.ToString()));
}
}
private void btnBold_Click(object sender, RoutedEventArgs e)
{
if (richTextBox.Selection.Text.Length > 0)
{
if (richTextBox.Selection.GetPropertyValue(Run.FontWeightProperty) is FontWeight && ((FontWeight)richTextBox.Selection.GetPropertyValue(Run.FontWeightProperty)) == FontWeights.Normal)
richTextBox.Selection.ApplyPropertyValue(Run.FontWeightProperty, FontWeights.Bold);
else
richTextBox.Selection.ApplyPropertyValue(Run.FontWeightProperty, FontWeights.Normal);
}
}
private void btnItalic_Click(object sender, RoutedEventArgs e)
{
if (richTextBox.Selection.Text.Length > 0)
{
if (richTextBox.Selection.GetPropertyValue(Run.FontStyleProperty) is FontStyle && ((FontStyle)richTextBox.Selection.GetPropertyValue(Run.FontStyleProperty)) == FontStyles.Normal)
richTextBox.Selection.ApplyPropertyValue(Run.FontStyleProperty, FontStyles.Italic);
else
richTextBox.Selection.ApplyPropertyValue(Run.FontStyleProperty, FontStyles.Normal);
}
}
private void btnUnderline_Click(object sender, RoutedEventArgs e)
{
if (richTextBox.Selection.Text.Length > 0)
{
if (richTextBox.Selection.GetPropertyValue(Run.TextDecorationsProperty) == null)
richTextBox.Selection.ApplyPropertyValue(Run.TextDecorationsProperty, TextDecorations.Underline);
else
richTextBox.Selection.ApplyPropertyValue(Run.TextDecorationsProperty, null);
}
}
/*
* TextSelection.Insert() - 把当前选中的内容替换成指定的 TextElement
* Hyperlink - 一个用于显示超链接的内联元素。Hyperlink继承自Span，Span继承自Inline，Inline继承自TextElement
* 以下举例如何插入超链接（要在 RichTextBox 使超链接有效，需要将 RichTextBox 设置为显示状态）
*/
private void btnHyperlink_Click(object sender, RoutedEventArgs e)
{
Hyperlink hyperlink = new Hyperlink();
hyperlink.TargetName = "_blank";
hyperlink.NavigateUri = new Uri("http://webabcd.cnblogs.com/");
hyperlink.Inlines.Add("webabcd blog");
richTextBox.Selection.Insert(hyperlink);
}
/*
* InlineUIContainer - 一个容器，可以承载任何 UIElement 类型的对象。InlineUIContainer继承自Inline
* 以下举例如何插入图片
*/
private void btnUIElement_Click(object sender, RoutedEventArgs e)
{
Image img = new Image();
img.Source = new BitmapImage(new Uri("/Resource/Logo.jpg", UriKind.Relative));
img.Width = 100;
img.Height = 100;
InlineUIContainer container = new InlineUIContainer();
container.Child = img;
richTextBox.Selection.Insert(container);
}
/*
* RichTextBox.Xaml - RichTextBox 中的内容的 xaml 代码
* 以下举例如何在“显示模式”和“代码模式”之间切换
*/
private void btnXaml_Checked(object sender, RoutedEventArgs e)
{
if (btnXaml.IsChecked.Value)
{
txtXaml.Text = richTextBox.Xaml;
txtXaml.Visibility = Visibility.Visible;
}
else
{
richTextBox.Xaml = txtXaml.Text;
txtXaml.Visibility = Visibility.Collapsed;
}
}
/*
* RichTextBox.IsReadOnly - 指定是否可以在 RichTextBox 中编辑内容
* true - 显示模式
* false - 编辑模式（此模式下可以通过快捷键的方式来支持撤销 Ctrl+Z 和重做 Ctrl+Y 操作）
* 以下举例如何预览 RichTextBox 中的内容（注：只有在显示模式中超链接才生效）
*/
private void btnPreview_Checked(object sender, RoutedEventArgs e)
{
richTextBox.IsReadOnly = btnPreview.IsChecked.Value;
}
private void btnTextPointerDemo_Click(object sender, RoutedEventArgs e)
{
/*
* TextPointer - 表示 RichTextBox 中的一个位置
* 插入位置（Insertion Position）的概念：
* TextPointer 出现在内容中的字符之间则为插入位置
* TextPointer 出现在定义内容结构的元素标记之间，则此位置不是插入位置。例如，两个相邻段落标记（即前一个段落的结束标记与下一个段落的开始标记）之间的位置就是一个有效的 TextPointer 位置，但不是插入位置
* TextPointer.CompareTo(TextPointer tp) - 当前 TextPointer 位于指定的 TextPointer 之前则为 -1，之后则为 1，相同则为 0
* TextPointer.IsAtInsertionPosition - 当前 TextPointer 是否是一个插入位置
* TextPointer.GetNextInsertionPosition(LogicalDirection direction) - 获取当前 TextPointer 的按指定的逻辑方向的下一个插入位置
* LogicalDirection - 逻辑方向 [System.Windows.Documents.LogicalDirection 枚举]
* LogicalDirection.Forward - 向前
* LogicalDirection.Backward - 向后
* TextPointer.GetPositionAtOffset(int offset, LogicalDirection direction) - 获取当前 TextPointer 的按指定的逻辑方向偏移了指定值的 TextPointer
* TextPointer.Parent - 包含当前 TextPointer 的容器。比如，文字的 Parent 是 run ；RichTextBox.ContentEnd 的 Parent 是 RichTextBox
*
* RichTextBox.ContentStart - RichTextBox 内容的开头的 TextPointer（肯定不是插入位置）
* RichTextBox.ContentEnd - RichTextBox 内容的结尾的 TextPointer（肯定不是插入位置）
* RichTextBox.GetPositionFromPoint(Point point) - 获取离指定 Point 最近的插入位置
* RichTextBox.Selection - 获取 RichTextBox 中的选中内容，返回一个 TextSelection 类型的对象
* TextSelection.Start - 选中内容的开头 TextPointer
* TextSelection.End - 选中内容的开头 TextPointer
* TextSelection.Select(TextPointer tp1, TextPointer tp2) - 指定两个 TextPointer 来更新选中内容
*
* 在 RichTextBox 中被视为一个符号的有：TextElement 的开始或结束标记；InlineUIContainer 中的 UIElement 元素；Run 中的字符
*/
// 将光标当前所在位置到文本结尾的文字全变为绿色
TextPointer currentPointer = richTextBox.Selection.Start;
TextPointer endPointer = richTextBox.ContentEnd.GetNextInsertionPosition(LogicalDirection.Backward);
richTextBox.Selection.Select(currentPointer, endPointer);
richTextBox.Selection.ApplyPropertyValue(Run.ForegroundProperty, Colors.Green);
// 将光标当前所在位置到文本结尾的文字信息输出到页面上
while (currentPointer.CompareTo(endPointer) == -1)
{
string currentChar = "";
TextPointer nextPointer = currentPointer.GetNextInsertionPosition(LogicalDirection.Forward);
if (nextPointer != null)
{
richTextBox.Selection.Select(currentPointer, nextPointer);
if (richTextBox.Selection.Text.Length != 0)
currentChar = richTextBox.Selection.Text;
}
lblMsg.Text += currentChar;
currentPointer = currentPointer.GetNextInsertionPosition(LogicalDirection.Forward);
}
}
}
}
OK
[源码下载]
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