WPF / XAML - 文本可以自动调整大小？

问题描述

对于一个固定大小的可打包文本区域，是否有任何方法可以根据文本的数量尽可能地增大字体大小？例如，if你有一个500x500的文字你好的地区，字体大小将是非常大的。但如果你有一段文字的字体大小将会更小，以适应该地区。

我已经看过视框但看不到它可以工作

任何可以做到这一点的xaml或代码都可以帮助（不一定是特定的控件）。

<$>

p $ p> < DockPanel x：Name =LayoutRoot>
< TextBox x：Name =textText =这是一些文字和一些更多的文字，我没有看到任何问题...DockPanel.Dock =TopTextChanged =text_TextChanged/> ;
< TextBlock DockPanel.Dock =TopText ={Binding ElementName = tb，Path = FontSize}/>
< Border Name =bdBorderBrush =BlackBorderThickness =1>
< TextBlock Name =tbText ={Binding ElementName = text，Path = Text}TextWrapping =Wrap/>
< / Border>
< / DockPanel>


而在代码后面：

{
this.InitializeComponent（）;
RecalcFontSize（）;
tb.SizeChanged + = new SizeChangedEventHandler（tb_SizeChanged）;


void tb_SizeChanged（object sender，SizeChangedEventArgs e）
{
RecalcFontSize（）;


private void RecalcFontSize（）
{
if（tb == null）return;
Size constraint = new Size（tb.ActualWidth，tb.ActualHeight）;
tb.Measure（constraint）;
while（tb.DesiredSize.Height< tb.ActualHeight）
{
tb.FontSize + = 1;
tb.Measure（constraint）;
}
tb.FontSize - = 1;


private void text_TextChanged（object sender，TextChangedEventArgs e）
{
RecalcFontSize（）;

试试吧，拖动它，改变文字...

For a fixed size wrappable text area, is there any way to make the font size as large as possible based on the amount of text?

For example, if you have a 500x500 area with the text "Hello", the font size would be really big. But if you have a paragraph of text the font size would be smaller to fit into the area.

I have looked at Viewbox but can't see that it could work with wrappable text.

ANY xaml or code that could do this would help (doesn't have to be a specific control).

解决方案

What you're asking is more complex than it sounds, but I'll give you an idea:

<DockPanel x:Name="LayoutRoot">
    <TextBox x:Name="text" Text="this is some text and some more text I don't see any problems..." DockPanel.Dock="Top" TextChanged="text_TextChanged"/>
    <TextBlock DockPanel.Dock="Top" Text="{Binding ElementName=tb, Path=FontSize}"/>
    <Border Name="bd" BorderBrush="Black" BorderThickness="1">
        <TextBlock Name="tb" Text="{Binding ElementName=text, Path=Text}" TextWrapping="Wrap"/>
    </Border>
</DockPanel>

And in code behind:

public MainWindow()
{
    this.InitializeComponent();
    RecalcFontSize();
    tb.SizeChanged += new SizeChangedEventHandler(tb_SizeChanged);
}

void tb_SizeChanged(object sender, SizeChangedEventArgs e)
{
    RecalcFontSize();
}

private void RecalcFontSize()
{
    if (tb == null) return;
    Size constraint = new Size(tb.ActualWidth, tb.ActualHeight);
    tb.Measure(constraint);
    while (tb.DesiredSize.Height < tb.ActualHeight)
    {
        tb.FontSize += 1;
        tb.Measure(constraint);
    }
    tb.FontSize -= 1;
}

private void text_TextChanged(object sender, TextChangedEventArgs e)
{
    RecalcFontSize();
}

Try it, drag it around, change the text...

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