I'm trying to make a tooltip for my video player. I use a windows media player embedded into my winform's app on c# (AxWMPLib.AxWindowsMediaPlayer) for playing video. And I have created a control that shows a current position of a media. This control is transparent. Control's code is below:
namespace player.Controls
{
public partial class TransparentToolTip : System.Windows.Forms.UserControl
{
public enum PointerLocation : byte { ... }
#region Private data
// ...
#endregion
Timer Wriggler = new Timer();
int iInterval = 100;
protected void TickHandler(object sender, EventArgs e)
{
this.InvalidateEx();
}
private void _SetStyle()
{
this.SetStyle((ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint | ControlStyles.ResizeRedraw | ControlStyles.CacheText | ControlStyles.ContainerControl), true);
this.SetStyle(ControlStyles.Selectable, false);
this.SetStyle(ControlStyles.SupportsTransparentBackColor | ControlStyles.Opaque, true);
this.UpdateStyles();
}
private void _SetTimer(int _Interval)
{
Wriggler.Tick += new EventHandler(TickHandler);
this.Wriggler.Interval = _Interval;
this.Wriggler.Enabled = true;
}
public TransparentToolTip()
{
InitializeComponent();
_SetStyle();
_SetTimer(iInterval);
}
public TransparentToolTip(System.ComponentModel.IContainer container)
{
container.Add(this);
InitializeComponent();
_SetStyle();
_SetTimer(iInterval);
}
protected override CreateParams CreateParams
{
get
{
CreateParams cp = base.CreateParams;
cp.ExStyle |= (0x00000020 | 0x00000008); // WS_EX_TRANSPARENT = 0x00000020, WS_EX_TOPMOST = 0x00000008
return cp;
}
}
#region Extra Properties
// ...
#endregion
// Drawing
protected void InvalidateEx()
{
if (Parent == null)
return;
Rectangle rc = new Rectangle(this.Location, this.Size);
Parent.Invalidate(rc, true);
}
protected override void OnPaintBackground(PaintEventArgs pevent)
{
}
protected override void OnPaint(PaintEventArgs pe)
{
pe.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
pe.Graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
pe.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
pe.Graphics.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
Rectangle rect = new Rectangle(this.ClientRectangle.X, this.ClientRectangle.Y, this.ClientRectangle.Width - 1, this.ClientRectangle.Height - 1);
SolidBrush brushBackground = new SolidBrush(ColorBackground);
SolidBrush brushBorder = new SolidBrush(ColorBorder);
using (GraphicsPath graphicsPath = ToolTipBody(...))
{
using (Pen p = new Pen(brushBorder, BorderSize))
{
pe.Graphics.FillPath(brushBackground, graphicsPath); // background
pe.Graphics.DrawPath(p, graphicsPath); // borders
}
}
TextFormatFlags flags = // some flags;
TextRenderer.DrawText(pe.Graphics, ToolTipText, Font, new Rectangle(this.ClientRectangle.X, this.ClientRectangle.Y, this.ClientRectangle.Width, this.ClientRectangle.Height - TriangleSizeSide), ToolTipColor, System.Drawing.Color.Transparent, flags);
brushBorder.Dispose();
brushBackground.Dispose();
base.OnPaint(pe);
}
// Form mapping tips
private GraphicsPath ToolTipBody(...)
{
// some code
return graphicsPath;
}
}
I try to show this tooltip over the axWindowsMediaPlayer object. But my control is overlapped by the media player. I've tried to use SetWindowPos but this does not work:
static readonly IntPtr HWND_TOPMOST = new IntPtr(-1);
const int SWP_NOSIZE = 0x0001;
const int SWP_NOMOVE = 0x0002;
const int SWP_SHOWWINDOW = 0x0040;
//...
[DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int x, int y, int cx, int cy, int flags);
//...
SetWindowPos(transparentToolTip1.Handle, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW);
Note: If do not change CreateParams of a new control it draws over the media player. But it becomes opaque.
Is any ideas to do it correct using winforms?