/// <summary>ExpanderへGridSnapModeの設定</summary>
/// <param name="obj"></param>
/// <param name="mode"></param>
public static void SetGridSnap(Expander obj, GridSnapMode mode)
{
if (obj == null)
{
return;
}
obj.SetValue(GridSnapProperty, mode);
}
/// <summary>垂直方向時のExpanderの内部処理拡張メソッド</summary>
/// <param name="expander"></param>
/// <param name="mode"></param>
private static void AttachMode_Vertical(this Expander expander, GridSnapMode mode)
{
if (expander == null)
{
return;
}
// イベント解除
expander.Expanded -= Expanded_Vertical;
expander.Collapsed -= Collapsed_Vertical;
Grid targetGrid = expander.FindAncestor <Grid>();
if (targetGrid == null)
{
return;
}
// 対象となるGridの情報を取得していく
int gridRow = Grid.GetRow(expander);
RowDefinition targetRowDefinition = targetGrid.RowDefinitions[gridRow];
// プロパティ内に情報をセット
SetTargetRowDefinition(expander, targetRowDefinition);
SetLastGridLength(expander, targetRowDefinition.Height);
// GridSplitterを取得
GridSplitter gridSplitter = null;
if (mode == GridSnapMode.Auto)
{
gridSplitter = targetGrid.FindDescendant <GridSplitter>();
}
else
{
gridSplitter = GetTargetGridSplitter(expander);
}
if (mode == GridSnapMode.Explicit && gridSplitter == null)
{
// GridSplitterの移動をそのままにするのにGridSplitterがnullはあり得ない
throw new ArgumentException("Mode [explicit] requires [TargetGridSplitter]");
}
// Binding実行
gridSplitter.SetBinding(UIElement.VisibilityProperty, new Binding(nameof(Expander.IsExpanded))
{
Mode = BindingMode.OneWay,
Converter = BoolToVisibleConverter,
Source = expander
});
expander.Expanded += Expanded_Vertical;
expander.Collapsed += Collapsed_Vertical;
}
private static void AttachMode_Horizontal(this Expander expander, GridSnapMode mode)
{
if (expander == null)
{
return;
}
expander.Expanded -= Expanded_Horizontal;
expander.Collapsed -= Collapsed_Horizontal;
Grid targetGrid = expander.FindAncestor <Grid>();
if (targetGrid == null)
{
return;
}
if (mode == GridSnapMode.None)
{
return;
}
int gridColumn = Grid.GetColumn(expander);
ColumnDefinition columnDefinition = targetGrid.ColumnDefinitions[gridColumn];
SetTargetColumnDefinition(expander, columnDefinition);
// 初回にExpanderを開く際、開かれたGridのActualWidthをとれずに検索テキストボックスの幅が微小になってしまう
// そのため、exeを立ち上げて最初にExpanderを開く際のみMainWindowの比で強引に値を入れてやる
// Expanderを開く前はExpander側の幅を調節できないため、数値がおかしくなる心配はないと想定される
if (_isFirst)
{
SetFirstGridLength(expander);
}
else
{
SetLastGridLength(expander, columnDefinition.Width);
}
GridSplitter gridSplitter = null;
if (mode == GridSnapMode.Auto)
{
gridSplitter = targetGrid.FindDescendant <GridSplitter>();
}
else
{
gridSplitter = GetTargetGridSplitter(expander);
}
if (mode == GridSnapMode.Explicit && gridSplitter == null)
{
throw new ArgumentException("[Explicit] requires [TargetGridSplitter]");
}
gridSplitter.SetBinding(UIElement.VisibilityProperty, new Binding(nameof(Expander.IsExpanded))
{
Mode = BindingMode.OneWay,
Converter = BoolToVisibleConverter,
Source = expander,
});
expander.Expanded += Expanded_Horizontal;
expander.Collapsed += Collapsed_Horizontal;
}
public static void SetGridSnap(Expander obj, GridSnapMode value)
{
obj.SetValue(GridSnapProperty, value);
}
