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Visual Studio | WPF > Window > 拡大して表示する (各種コントロールも拡大)

Last updated at Posted at 2017-12-25
動作環境
Windows 8.1 Pro (64bit)
Microsoft Visual Studio 2017 Community

c++ Builder > form > フォームの大きさをコードで拡大する > this->ScaleBy(120,100);
の処理をWPFではどのように実装するか。

処理

以下とした

  • XAMLにてSizeToControl="WidthAndHeight"を設定
  • XAMLにてViewboxを使用
    • 中にGrid(Height, Width固定)を使用
      • 中にコントロールを配置する
  • code behindにおいてViewboxの(Height, Width)を変更する

参考

code

MainWindow.xaml
<Window x:Class="_171225_t1400_scaleBy.MainWindow"
        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:local="clr-namespace:_171225_t1400_scaleBy"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525"
        SizeToContent="WidthAndHeight">
    <!-- SizeToContent を指定した-->
    <Viewbox Name="VWB_outer"
            StretchDirection="Both" Stretch="Uniform"
                Height="320" Width="515">
        <Grid Height="320" Width="515">
            <Button Name="Button1"
            Content="Button" Height="30" Click="Button_Click"/>
            <Label Content="Label" HorizontalAlignment="Left" Margin="28,36,0,0" VerticalAlignment="Top"/>
            <CheckBox Content="CheckBox" HorizontalAlignment="Left" Margin="111,47,0,0" VerticalAlignment="Top"/>
            <RadioButton Content="RadioButton" HorizontalAlignment="Left" Margin="312,37,0,0" VerticalAlignment="Top"/>
            <RadioButton Content="RadioButton" HorizontalAlignment="Left" Margin="312,69,0,0" VerticalAlignment="Top"/>
        </Grid>
    </Viewbox>
</Window>
MainWindow.xaml.cs
using System.Windows;

namespace _171225_t1400_scaleBy
{
    /// <summary>
    /// MainWindow.xaml の相互作用ロジック
    /// </summary>
    public partial class MainWindow : Window
    {
        static bool s_bfEnlarged = false; // 拡大済かどうか

        public MainWindow()
        {
            InitializeComponent();
        }
       
        static readonly double kScaleFactor = 1.5;

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            if (s_bfEnlarged)
            {
                VWB_inner.Height = VWB_inner.Height / kScaleFactor;
                VWB_inner.Width = VWB_inner.Width / kScaleFactor;
                s_bfEnlarged = false;
            } else {
                VWB_inner.Height = VWB_inner.Height * kScaleFactor;
                VWB_inner.Width = VWB_inner.Width * kScaleFactor;
                s_bfEnlarged = true;
            }
        }
    }
}

実行例

拡大なし
qiita.png

拡大あり
qiita.png

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