同様の質問がObjectListの使用を提案しましたが、それは私が望んでいたものに対してやり過ぎのように見えました。代わりに、リスト内のアイテムに基づいてサイズを変更するために、この単純なオーバーロード(以下)を作成しました。
Windows Vistaでこの表示を詳細モードでテストしただけですが、シンプルでうまく機能しているようです。
#pragma once
/// <summary>
/// A ListView based control which adds a method to resize itself to show all
/// items inside it.
/// </summary>
public ref class ResizingListView :
public System::Windows::Forms::ListView
{
public:
/// <summary>
/// Constructs a ResizingListView
/// </summary>
ResizingListView(void);
/// <summary>
/// Works out the height of the header and all the items within the control
/// and resizes itself so that all items are shown.
/// </summary>
void ResizeToItems(void)
{
// Work out the height of the header
int headerHeight = 0;
int itemsHeight = 0;
if( this->Items->Count == 0 )
{
// If no items exist, add one so we can use it to work out
this->Items->Add("");
headerHeight = GetHeaderSize();
this->Items->Clear();
itemsHeight = 0;
}
else
{
headerHeight = GetHeaderSize();
itemsHeight = this->Items->Count*this->Items[0]->Bounds.Height;
}
// Work out the overall height and resize to it
System::Drawing::Size sz = this->Size;
int borderSize = 0;
if( this->BorderStyle != System::Windows::Forms::BorderStyle::None )
{
borderSize = 2;
}
sz.Height = headerHeight+itemsHeight+borderSize;
this->Size = sz;
}
protected:
/// <summary>
/// Grabs the top of the first item in the list to work out how tall the
/// header is. Note: There _must_ at least one item in the list or an
/// exception will be thrown
/// </summary>
/// <returns>The height of the header</returns>
int GetHeaderSize(void)
{
return Items[0]->Bounds.Top;
}
};