public static extern bool GetWindowPlacement(IntPtr hWnd, out WINDOWPLACEMENT lpwndpl);
/// <summary>
/// スクリーン内の補正
/// </summary>
/// <param name="wp">WINDOWPLACEMENT</param>
/// <returns>結果(true:補正なし,false:補正あり)</returns>
public static bool CheckScreen(ref WINDOWPLACEMENT wp)
{
System.Drawing.Rectangle rect = new System.Drawing.Rectangle(
wp.rcNormalPosition_left,
wp.rcNormalPosition_top,
wp.rcNormalPosition_right - wp.rcNormalPosition_left,
wp.rcNormalPosition_bottom - wp.rcNormalPosition_top);
// スクリーン内に存在するか検証
System.Windows.Forms.Screen scr = System.Windows.Forms.Screen.FromRectangle(rect);
// タスクバーを除いた領域内で検証する
System.Drawing.Rectangle area = scr.WorkingArea;
if (area.Contains(rect))
{
return(true);
}
// 表示位置を補正する
int l = rect.Left, t = rect.Top;
if (area.Left > rect.Left)
{
l = area.Left;
}
if (area.Right < rect.Right)
{
l = rect.Left - (rect.Right - area.Right);
}
if (area.Top > rect.Top)
{
t = area.Top;
}
if (area.Bottom < rect.Bottom)
{
t = rect.Top - (rect.Bottom - area.Bottom);
}
System.Drawing.Rectangle tmp = new System.Drawing.Rectangle(l, t, rect.Width, rect.Height);
if (area.Contains(tmp))
{
wp.rcNormalPosition_left = l;
wp.rcNormalPosition_top = t;
wp.rcNormalPosition_right = wp.rcNormalPosition_left + rect.Width;
wp.rcNormalPosition_bottom = wp.rcNormalPosition_top + rect.Height;
return(false);
}
// 中央に補正する
Rect work = SystemParameters.WorkArea;
rect.X = (int)((work.Width - rect.Width) / 2.0);
rect.Y = (int)((work.Height - rect.Height) / 2.0);
if (rect.Left < 0 || rect.Top < 0)
{
// 納まらない場合はサイズを調整する
wp.rcNormalPosition_left = 0;
wp.rcNormalPosition_top = 0;
wp.rcNormalPosition_right = (int)work.Width;
wp.rcNormalPosition_bottom = (int)work.Height;
}
else
{
wp.rcNormalPosition_left = rect.X;
wp.rcNormalPosition_top = rect.Y;
wp.rcNormalPosition_right = wp.rcNormalPosition_left + rect.Width;
wp.rcNormalPosition_bottom = wp.rcNormalPosition_top + rect.Height;
}
return(false);
}
public static extern bool SetWindowPlacement(IntPtr hWnd, [In] ref WINDOWPLACEMENT lpwndpl);