CTaskbarNotifier class (http://www.codeproject.com/dialog/TaskbarNotifier.asp[ ^])
As a result, I coded a MSN Messenger-like skinnable popup, with a close button which looks almost like Microsoft's one (with the associated skin).
The TaskbarNotifier class inherits from System.Windows.Forms.Form and adds a few methods to it.
The MSN messenger like popup supports:
This class is stand alone and doesn't need any particular libraries except .NET default ones. It runs in managed code and hence should be portable.
using CustomUIControls;
TaskbarNotifier taskbarNotifier;
taskbarNotifier=new TaskbarNotifier();
taskbarNotifier.SetBackgroundBitmap("skin.bmp",
Color.FromArgb(255,0,255));
taskbarNotifier.SetCloseBitmap("close.bmp",
Color.FromArgb(255,0,255),new Point(127,8));
taskbarNotifier.TitleRectangle=new Rectangle(40,9,70,25);
taskbarNotifier.ContentRectangle=new Rectangle(8,41,133,68);
taskbarNotifier.TitleClick+=new EventHandler(TitleClick);
taskbarNotifier.ContentClick+=new EventHandler(ContentClick);
taskbarNotifier.CloseClick+=new EventHandler(CloseClick);
taskbarNotifier.SetBackgroundBitmap("skin.bmp",
Color.FromArgb(255,0,255));
taskbarNotifier.SetCloseBitmap("close.bmp",
Color.FromArgb(255,0,255),new Point(127,8));
The first line sets the background bitmap skin and transparency color (must be present), and the second line sets the 3-State close button with its transparency color and its location on the window (this line is optional if you don't want a close button).
taskbarNotifier.TitleRectangle=new Rectangle(40,9,70,25);
taskbarNotifier.ContentRectangle=new Rectangle(8,41,133,68);
These two lines allow us to define the rectangles in which will be displayed, the title and content texts.
taskbarNotifier.TitleClick+=new EventHandler(OnTitleClick);
taskbarNotifier.ContentClick+=new EventHandler(OnContentClick);
taskbarNotifier.CloseClick+=new EventHandler(OnCloseClick);
These 3 lines allow us to intercept events on the popup such as title/content or close button have been clicked
taskbarNotifier.Show("TitleText","ContentText",500,3000,500);
This will show the popup animation with the showing/visible/hiding animations time set as 500ms/3000ms/500ms.
You can play with a few properties:
void Show(string strTitle, string strContent, int nTimeToShow,
int nTimeToStay, int nTimeToHide)
Displays the popup for a certain amount of time.
strTitle: The string which will be shown as the title of the popup
strContent: The string which will be shown as the content of the popup
nTimeToShow: Duration of the showing animation (in milliseconds)
nTimeToStay: Duration of the visible state before collapsing (in milliseconds)
nTimeToHide: Duration of the hiding animation (in milliseconds) void Hide()
Forces the popup to hide.
void SetBackgroundBitmap(string strFilename, Color transparencyColor)
Sets the background bitmap and its transparency color.
strFilename: Path of the background bitmap on the disk
transparencyColor: Color of the bitmap which won't be visible void SetBackgroundBitmap(Image image, Color transparencyColor)
Sets the background bitmap and its transparency color.
image: Background bitmap
transparencyColor: Color of the bitmap which won't be visible
void SetCloseBitmap(string strFilename,
Color transparencyColor, Point position)
Sets the 3-State close button bitmap, its transparency color and its coordinates.
strFilename: Path of the 3-state close button bitmap on the disk (width must be a multiple of 3)
transparencyColor: Color of the bitmap which won't be visible
position: Location of the close button on the popup void SetCloseBitmap(Image image, Color transparencyColor, Point position)
Sets the 3-State close button bitmap, its transparency color and its coordinates.
image: Image/Bitmap object which represents the 3-state close button bitmap (width must be a multiple of 3)
transparencyColor: Color of the bitmap which won't be visible
position: Location of the close button on the popup string TitleText (get/set)
string ContentText (get/set)
TaskbarStates TaskbarState (get)
Color NormalTitleColor (get/set)
Color HoverTitleColor (get/set)
Color NormalContentColor (get/set)
Color HoverContentColor (get/set)
Font NormalTitleFont (get/set)
Font HoverTitleFont (get/set)
Font NormalContentFont (get/set)
Font HoverContentFont (get/set)
Rectangle TitleRectangle (get/set) //must be defined before calling show())
Rectangle ContentRectangle (get/set) //must be defined before calling show())
bool TitleClickable (get/set) (default = false);
bool ContentClickable (get/set) (default = true);
bool CloseClickable (get/set) (default = true);
bool EnableSelectionRectangle (get/set) (default = true);
event EventHandler CloseClick event EventHandler TitleClick event EventHandler ContentClick
The popup is skinned using a region generated dynamically from a bitmap and a transparency color:
protected Region BitmapToRegion(Bitmap bitmap, Color transparencyColor)
{
if (bitmap == null)
throw new ArgumentNullException("Bitmap", "Bitmap cannot be null!");
int height = bitmap.Height;
int width = bitmap.Width;
GraphicsPath path = new GraphicsPath();
for (int j=0; j<height; j++ )
for (int i=0; i<width; i++)
{
if (bitmap.GetPixel(i, j) == transparencyColor)
continue;
int x0 = i;
while ((i < width) &&
(bitmap.GetPixel(i, j) != transparencyColor))
i++;
path.AddRectangle(new Rectangle(x0, j, i-x0, 1));
}
Region region = new Region(path);
path.Dispose();
return region;
}
The refresh() of the popup is done using the double buffering technique to avoid flickering:
protected override void OnPaintBackground(PaintEventArgs pea) { Graphics grfx = pea.Graphics; grfx.PageUnit = GraphicsUnit.Pixel; Graphics offScreenGraphics; Bitmap offscreenBitmap; offscreenBitmap = new Bitmap(BackgroundBitmap.Width, BackgroundBitmap.Height); offScreenGraphics = Graphics.FromImage(offscreenBitmap); if (BackgroundBitmap != null) { offScreenGraphics.DrawImage(BackgroundBitmap, 0, 0, BackgroundBitmap.Width, BackgroundBitmap.Height); } DrawCloseButton(offScreenGraphics); DrawText(offScreenGraphics); grfx.DrawImage(offscreenBitmap, 0, 0); }
Since I wanted to keep only managed code, I used the Screen.GetWorkingArea(WorkAreaRectangle) function instead of using unmanaged code to get the taskbar position. As a result, I made the popup always appear at the bottom of WorkAreaRectangle whichever position the taskbar has.
I didn't find any C# managed equivalent to the Win32 function ShowWindow(SW_SHOWNOACTIVATE) to make the popup, not steal the focus of the active window.
OnMouseUp handler.
TaskbarNotifier has been done by Patrick Vanden Driessche in VB.NET
ShowWindow(SW_SHOWNOACTIVATE), to prevent the popup from stealing the focus. I hope this code will be useful to you. If you have suggestions to enhance this class functionalities, please post a comment.
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