private void getComboButtonWidth()
{
if (!this.IsHandleCreated)
{
return;
}
DATETIMEPICKERINFO pickerInfo = new DATETIMEPICKERINFO()
{
cbSize = Marshal.SizeOf(typeof(DATETIMEPICKERINFO))
};
IntPtr pickerInfoPointer = Marshal.AllocHGlobal(Marshal.SizeOf(pickerInfo));
Marshal.StructureToPtr(pickerInfo, pickerInfoPointer, false);
SendMessage(this.Handle, DTM_GETDATETIMEPICKERINFO, ( IntPtr )0, pickerInfoPointer);
pickerInfo = ( DATETIMEPICKERINFO )Marshal.PtrToStructure(pickerInfoPointer, typeof(DATETIMEPICKERINFO));
int buttonWidth = pickerInfo.rcButton.Right - pickerInfo.rcButton.Left;
_buttonWidth = buttonWidth;
#if DEBUG
Console.WriteLine("_buttonWidth = " + _buttonWidth);
#endif
}
private static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, DATETIMEPICKERINFO lParam);
private void CustomDraw(object sender, PaintEventArgs e)
{
// ネイティブイメージを描画
var bmpOrg = cdw.NativeClientBitmap;
var g = e.Graphics;
g.DrawImage(bmpOrg, Point.Empty);
// 枠を除いて描画領域とする
var bsz = SystemInformation.Border3DSize;
var clip = Rectangle.Inflate(this.ClientRectangle, -bsz.Width, -bsz.Height);
IntPtr hdc = g.GetHdc();
try
{
// BackColor を反映
using (var bmpBack = (Bitmap)bmpOrg.Clone())
{
BitBlt(bmpBack, BackColor, SRCAND);
BitBlt(hdc, bmpBack, clip, SRCCOPY);
}
// ForeColor を反映
using (var bmpFore = CreateNegativeBitmap(bmpOrg))
{
Color foreColor = IsDisable ? Color.Gray : ForeColor;
BitBlt(bmpFore, foreColor, SRCAND);
BitBlt(hdc, bmpFore, clip, SRCPAINT);
}
// レイアウト（チェックボックスとボタンの位置）を取得
var dti = new DATETIMEPICKERINFO();
SendMessage(this.Handle, DTM_GETDATETIMEPICKERINFO, IntPtr.Zero, dti);
Rectangle checkBox = dti.rcCheck.Rectangle;
Rectangle button = dti.rcButton.Rectangle;
// チェックボックスを描画
if (!checkBox.IsEmpty)
{
// チェックボックスの領域をネイティブイメージより描画
BitBlt(hdc, bmpOrg, checkBox, SRCCOPY);
}
// アップダウンコントロールがある場合はその領域をボタン領域とする
if (dti.hwndUD != IntPtr.Zero)
{
GetWindowRect(dti.hwndUD, out RECT rc);
button = RectangleToClient(rc.Rectangle);
}
// ボタンを描画
if (!button.IsEmpty)
{
// ボタンの領域をネイティブイメージより描画
BitBlt(hdc, bmpOrg, button, SRCCOPY);
}
// フォーカスがあるとき、キャレットの部分のみ転送
if (this.ContainsFocus)
{
// キャレットの色を検索する領域を設定
var left = clip.Left;
var right = clip.Right;
if (!checkBox.IsEmpty)
{
left = checkBox.Right;
}
if (!button.IsEmpty)
{
right = button.Left;
}
var canvas = Rectangle.FromLTRB(left, clip.Top, right, clip.Bottom);
Rectangle caret = GetCaretRectangle(bmpOrg, canvas);
if (!caret.IsEmpty)
{
BitBlt(hdc, bmpOrg, caret, SRCCOPY);
}
}
}
finally
{
g.ReleaseHdc();
}
}
static extern IntPtr SendMessage(IntPtr hWnd, int Msg,
IntPtr wParam, ref DATETIMEPICKERINFO info);
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_PAINT)
{
var info = new DATETIMEPICKERINFO();
info.cbSize = Marshal.SizeOf(info);
SendMessage(Handle, DTM_GETDATETIMEPICKERINFO, IntPtr.Zero, ref info);
var clientRect = new Rectangle(0, 0, Width, Height);
var dropDownButtonRect = new Rectangle(info.rcButton.L, info.rcButton.T,
info.rcButton.R - info.rcButton.L, clientRect.Height);
var dropDownRect = dropDownButtonRect;
var imageRect = Rectangle.Empty;
if (info.rcButton.R - info.rcButton.L > SystemInformation.HorizontalScrollBarArrowWidth)
{
var w = dropDownButtonRect.Width / 2;
imageRect = dropDownButtonRect;
imageRect.Width = w;
dropDownRect.X += w;
dropDownRect.Width = w;
}
var checkBoxRect = new Rectangle(info.rcCheck.L, info.rcCheck.T,
info.rcCheck.R - info.rcCheck.L, clientRect.Height);
var innerRect = new Rectangle(checkBoxRect.Right + 1, 1,
clientRect.Width - dropDownButtonRect.Width - checkBoxRect.Width - (ShowCheckBox ? 3 : 1),
clientRect.Height - 2);
if (RightToLeft == RightToLeft.Yes && RightToLeftLayout == true)
{
dropDownButtonRect.X = clientRect.Width - dropDownButtonRect.Right;
dropDownButtonRect.Width += 1;
innerRect.X -= clientRect.Width - innerRect.X;
innerRect.Width += 1;
imageRect.X = clientRect.Width - imageRect.Right;
dropDownRect.X = clientRect.Width - dropDownRect.Right;
dropDownRect.Width += 1;
}
var middle = new Point(dropDownRect.Left + dropDownRect.Width / 2,
dropDownRect.Top + dropDownRect.Height / 2);
var arrow = new Point[]
{
new Point(middle.X - 3, middle.Y - 2),
new Point(middle.X + 4, middle.Y - 2),
new Point(middle.X, middle.Y + 2)
};
var borderColor = Enabled ? BorderColor : Color.LightGray;
var ps = new PAINTSTRUCT();
bool shoulEndPaint = false;
IntPtr dc;
if (m.WParam == IntPtr.Zero)
{
dc = BeginPaint(Handle, ref ps);
m.WParam = dc;
shoulEndPaint = true;
}
else
{
dc = m.WParam;
}
var rgn = CreateRectRgn(innerRect.Left, innerRect.Top, innerRect.Right, innerRect.Bottom);
SelectClipRgn(dc, rgn);
DefWndProc(ref m);
DeleteObject(rgn);
rgn = CreateRectRgn(clientRect.Left, clientRect.Top, clientRect.Right, clientRect.Bottom);
SelectClipRgn(dc, rgn);
using (var g = Graphics.FromHdc(dc))
{
if (ShowCheckBox)
{
var r = Rectangle.FromLTRB(info.rcCheck.L, info.rcCheck.T,
info.rcCheck.R, info.rcCheck.B);
if (Checked)
{
DrawFrameControl(dc, ref info.rcCheck, DFC_MENU, DFCS_MENUCHECK);
}
else
{
g.FillRectangle(SystemBrushes.Window, r);
}
if (!Enabled)
{
using (var b = new SolidBrush(Color.FromArgb(200, SystemColors.Control)))
g.FillRectangle(b, r);
}
var r2 = r;
r2.Width -= 1; r2.Height -= 1;
g.DrawRectangle(Enabled ? SystemPens.WindowText : SystemPens.GrayText, r2);
r2.Inflate(1, 1);
g.DrawRectangle(Pens.White, r2);
}
if (ShowUpDown)
{
if (updownRenderer == null && info.hwndUD != IntPtr.Zero)
{
updownRenderer = new UpDownRenderer(info.hwndUD);
}
updownRenderer.ButtonColor = this.BorderColor;
updownRenderer.ArrowColor = Color.Black;
}
else
{
var buttonColor = Enabled ? BorderColor : Color.LightGray;
var arrorColor = Color.Black;
var imageToRender = calendarImage;
if (dropDownButtonRect.Contains(PointToClient(Cursor.Position)))
{
arrorColor = Color.White;
imageToRender = calendarImageWhite;
}
using (var brush = new SolidBrush(buttonColor))
g.FillRectangle(brush, dropDownButtonRect);
if (imageRect != Rectangle.Empty)
{
g.DrawImage(imageToRender,
imageRect.Left + ((imageRect.Width - imageToRender.Width) / 2),
imageRect.Top + ((imageRect.Height - imageToRender.Height) / 2),
calendarImage.Width,
calendarImage.Height);
}
using (var brush = new SolidBrush(arrorColor))
g.FillPolygon(brush, arrow);
}
using (var pen = new Pen(borderColor))
g.DrawRectangle(pen, 0, 0,
ClientRectangle.Width - 1, ClientRectangle.Height - 1);
}
if (shoulEndPaint)
{
EndPaint(Handle, ref ps);
}
DeleteObject(rgn);
}
else
{
base.WndProc(ref m);
}
}
