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wxPython / wx / lib / agw / supertooltip.py

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# --------------------------------------------------------------------------------- #
# SUPERTOOLTIP wxPython IMPLEMENTATION
#
# Andrea Gavana, @ 07 October 2008
# Latest Revision: 14 Sep 2011, 21.00 GMT
#
#
# TODO List
#
# 1) Maybe add some more customization like multiline text
#    in the header and footer;
# 2) Check whether it's possible to use rounded corners and
#    shadows on the Mac
#
#
# For all kind of problems, requests of enhancements and bug reports, please
# write to me at:
#
# andrea.gavana@gmail.com
# andrea.gavana@maerskoil.com
#
# Or, obviously, to the wxPython mailing list!!!
#
#
# End Of Comments
# --------------------------------------------------------------------------------- #

"""
L{SuperToolTip} is a class that mimics the behaviour of `wx.TipWindow` and generic tooltip
windows, although it is a custom-drawn widget.


Description
===========

L{SuperToolTip} is a class that mimics the behaviour of `wx.TipWindow` and generic tooltip
windows, although it is a custom-drawn widget.

This class supports:

* Blended triple-gradient for the tooltip background;
* Header text and header image, with possibility to set the header font indipendently;
* Footer text and footer image, with possibility to set the footer font indipendently;
* Multiline text message in the tooltip body, plus an optional image as "body image";
* Bold lines and hyperlink lines in the tooltip body;
* A wide set of predefined drawing styles for the tooltip background;
* Drawing of separator lines after the header and/or before the footer;
* Rounded corners and shadows below the tooltip window (Windows XP only);
* Fade in/fade out effects (Windows XP only);
* User-settable delays for the delay after which the tooltip appears and the delay
  after which the tooltip is destroyed.

And a lot more. Check the demo for an almost complete review of the functionalities.


Usage
=====

Usage example::

    import wx
    import wx.lib.agw.supertooltip as STT

    class MyFrame(wx.Frame):

        def __init__(self, parent):
        
            wx.Frame.__init__(self, parent, -1, "SuperToolTip Demo")

            panel = wx.Panel(self)
            button = wx.Button(panel, -1, "I am the SuperToolTip target", pos=(100, 50))
            
            tip = STT.SuperToolTip("A nice tooltip message")

            tip.SetHeader("Hello World")
            tip.SetTarget(button)
            tip.SetDrawHeaderLine(True)

            tip.ApplyStyle("Office 2007 Blue")
            
            tip.SetDropShadow(True)
        
        
    # our normal wxApp-derived class, as usual

    app = wx.PySimpleApp()

    frame = MyFrame(None)
    app.SetTopWindow(frame)
    frame.Show()

    app.MainLoop()



Supported Platforms
===================

L{SuperToolTip} has been tested on the following platforms:
  * Windows (Windows XP).


Window Styles
=============

`No particular window styles are available for this class.`


Events Processing
=================

`No custom events are available for this class.`


License And Version
===================

L{SuperToolTip} is distributed under the wxPython license.

Latest Revision: Andrea Gavana @ 14 Sep 2011, 21.00 GMT

Version 0.4

"""

import wx
import webbrowser

# Let's see if we can add few nice shadows to our tooltips (Windows only)
_libimported = None

if wx.Platform == "__WXMSW__":
    osVersion = wx.GetOsVersion()
    # Shadows behind menus are supported only in XP
    if osVersion[1] == 5 and osVersion[2] == 1:
        try:
            # Try Mark Hammond's win32all extensions
            import win32api
            import win32con
            import win32gui
            import winxpgui
            _libimported = "MH"
        except ImportError:
            _libimported = None
    else:
        _libimported = None


# Define a bunch of predefined colour schemes...

_colourSchemes = {"Beige": (wx.Colour(255,255,255), wx.Colour(242,242,223), wx.Colour(198,195,160), wx.Colour(0,0,0)),
                  "Blue": (wx.Colour(255,255,255), wx.Colour(202,220,246), wx.Colour(150,180,222), wx.Colour(0,0,0)),
                  "Blue 2": (wx.Colour(255,255,255), wx.Colour(228,236,248), wx.Colour(198,214,235), wx.Colour(0,0,0)),
                  "Blue 3": (wx.Colour(255,255,255), wx.Colour(213,233,243), wx.Colour(151,195,216), wx.Colour(0,0,0)),
                  "Blue 4": (wx.Colour(255,255,255), wx.Colour(227,235,255), wx.Colour(102,153,255), wx.Colour(0,0,0)),
                  "Blue Glass": (wx.Colour(182,226,253), wx.Colour(137,185,232), wx.Colour(188,244,253), wx.Colour(0,0,0)),
                  "Blue Glass 2": (wx.Colour(192,236,255), wx.Colour(147,195,242), wx.Colour(198,254,255), wx.Colour(0,0,0)),
                  "Blue Glass 3": (wx.Colour(212,255,255), wx.Colour(167,215,255), wx.Colour(218,255,255), wx.Colour(0,0,0)),
                  "Blue Inverted": (wx.Colour(117,160,222), wx.Colour(167,210,240), wx.Colour(233,243,255), wx.Colour(0,0,0)),
                  "Blue Shift": (wx.Colour(124,178,190), wx.Colour(13,122,153),  wx.Colour(0,89,116),    wx.Colour(255,255,255)),
                  "CodeProject": (wx.Colour(255,250,172), wx.Colour(255,207,157), wx.Colour(255,153,0),   wx.Colour(0,0,0)),
                  "Dark Gray": (wx.Colour(195,195,195), wx.Colour(168,168,168), wx.Colour(134,134,134), wx.Colour(255,255,255)),
                  "Deep Purple": (wx.Colour(131,128,164), wx.Colour(112,110,143), wx.Colour(90,88,117),   wx.Colour(255,255,255)),
                  "Electric Blue": (wx.Colour(224,233,255), wx.Colour(135,146,251), wx.Colour(99,109,233),  wx.Colour(0,0,0)),
                  "Firefox": (wx.Colour(255,254,207), wx.Colour(254,248,125), wx.Colour(225,119,24),  wx.Colour(0,0,0)),
                  "Gold": (wx.Colour(255,202,0),   wx.Colour(255,202,0),   wx.Colour(255,202,0),   wx.Colour(0,0,0)),
                  "Gold Shift": (wx.Colour(178,170,107), wx.Colour(202,180,32),  wx.Colour(162,139,1),   wx.Colour(255,255,255)),
                  "Gray": (wx.Colour(255,255,255), wx.Colour(228,228,228), wx.Colour(194,194,194), wx.Colour(0,0,0)),
                  "Green": (wx.Colour(234,241,223), wx.Colour(211,224,180), wx.Colour(182,200,150), wx.Colour(0,0,0)),
                  "Green Shift": (wx.Colour(129,184,129), wx.Colour(13,185,15),   wx.Colour(1,125,1), wx.Colour(255,255,255)),
                  "Light Green": (wx.Colour(174,251,171), wx.Colour(145,221,146), wx.Colour(90,176,89),   wx.Colour(0,0,0)),
                  "NASA Blue": (wx.Colour(0,91,134),    wx.Colour(0,100,150),   wx.Colour(0,105,160),   wx.Colour(255,255,255)),
                  "Office 2007 Blue": (wx.Colour(255,255,255), wx.Colour(242,246,251), wx.Colour(202,218,239), wx.Colour(76,76,76)),
                  "Orange Shift": (wx.Colour(179,120,80),  wx.Colour(183,92,19),   wx.Colour(157,73,1),    wx.Colour(255,255,255)),
                  "Outlook Green": (wx.Colour(236,242,208), wx.Colour(219,230,187), wx.Colour(195,210,155), wx.Colour(0,0,0)),
                  "Pale Green": (wx.Colour(249,255,248), wx.Colour(206,246,209), wx.Colour(148,225,155), wx.Colour(0,0,0)),
                  "Pink Blush": (wx.Colour(255,254,255), wx.Colour(255,231,242), wx.Colour(255,213,233), wx.Colour(0,0,0)),
                  "Pink Shift": (wx.Colour(202,135,188), wx.Colour(186,8,158),   wx.Colour(146,2,116),   wx.Colour(255,255,255)),
                  "Pretty Pink": (wx.Colour(255,240,249), wx.Colour(253,205,217), wx.Colour(255,150,177), wx.Colour(0,0,0)),
                  "Red": (wx.Colour(255,183,176), wx.Colour(253,157,143), wx.Colour(206,88,78),   wx.Colour(0,0,0)),
                  "Red Shift": (wx.Colour(186,102,102), wx.Colour(229,23,9),    wx.Colour(182,11,1),    wx.Colour(255,255,255)),
                  "Silver": (wx.Colour(255,255,255), wx.Colour(242,242,246), wx.Colour(212,212,224), wx.Colour(0,0,0)),
                  "Silver 2": (wx.Colour(255,255,255), wx.Colour(242,242,248), wx.Colour(222,222,228), wx.Colour(0,0,0)),
                  "Silver Glass": (wx.Colour(158,158,158), wx.Colour(255,255,255), wx.Colour(105,105,105), wx.Colour(0,0,0)),
                  "Silver Inverted": (wx.Colour(161,160,186), wx.Colour(199,201,213), wx.Colour(255,255,255), wx.Colour(0,0,0)),
                  "Silver Inverted 2": (wx.Colour(181,180,206), wx.Colour(219,221,233), wx.Colour(255,255,255), wx.Colour(0,0,0)),
                  "Soylent Green": (wx.Colour(134,211,131), wx.Colour(105,181,106), wx.Colour(50,136,49),   wx.Colour(255,255,255)),
                  "Spring Green": (wx.Colour(154,231,151), wx.Colour(125,201,126), wx.Colour(70,156,69),   wx.Colour(255,255,255)),
                  "Too Blue": (wx.Colour(255,255,255), wx.Colour(225,235,244), wx.Colour(188,209,226), wx.Colour(0,0,0)),
                  "Totally Green": (wx.Colour(190,230,160), wx.Colour(190,230,160), wx.Colour(190,230,160), wx.Colour(0,0,0)),
                  "XP Blue": (wx.Colour(119,185,236), wx.Colour(81,144,223),  wx.Colour(36,76,171),   wx.Colour(255,255,255)),
                  "Yellow": (wx.Colour(255,255,220), wx.Colour(255,231,161), wx.Colour(254,218,108), wx.Colour(0,0,0))}


def GetStyleKeys():
    """ Returns the predefined styles keywords. """

    schemes = _colourSchemes.keys()
    schemes.sort()
    return schemes


def MakeBold(font):
    """
    Makes a font bold. Utility method.

    :param `font`: the font to be made bold.
    """

    newFont = wx.Font(font.GetPointSize(), font.GetFamily(), font.GetStyle(),
                      wx.BOLD, font.GetUnderlined(), font.GetFaceName())

    return newFont


def ExtractLink(line):
    """
    Extract the link from an hyperlink line.

    :param `line`: the line of text to be processed.
    """

    line = line[4:]
    indxStart = line.find("{")
    indxEnd = line.find("}")
    hl = line[indxStart+1:indxEnd].strip()
    line = line[0:indxStart].strip()

    return line, hl


class ToolTipWindowBase(object):
    """ Base class for the different Windows and Mac implementation. """

    def __init__(self, parent, classParent):
        """
        Default class constructor.

        :param `parent`: the L{SuperToolTip} parent widget;
        :param `classParent`: the L{SuperToolTip} class object.
        """

        self._spacing = 6
        self._wasOnLink = False
        self._hyperlinkRect, self._hyperlinkWeb = [], []

        self._classParent = classParent
        self._alphaTimer = wx.Timer(self, wx.ID_ANY)

        # Bind the events
        self.Bind(wx.EVT_PAINT, self.OnPaint)
        self.Bind(wx.EVT_SIZE, self.OnSize)
        self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
        self.Bind(wx.EVT_MOTION, self.OnMouseMotion)
        self.Bind(wx.EVT_TIMER, self.AlphaCycle)
        self.Bind(wx.EVT_KILL_FOCUS, self.OnDestroy)
        self.Bind(wx.EVT_LEFT_DOWN, self.OnDestroy)
        self.Bind(wx.EVT_LEFT_DCLICK, self.OnDestroy)


    def OnPaint(self, event):
        """
        Handles the ``wx.EVT_PAINT`` event for L{SuperToolTip}.

        :param `event`: a `wx.PaintEvent` event to be processed.
        """

        # Go with double buffering...
        dc = wx.BufferedPaintDC(self)

        frameRect = self.GetClientRect()
        x, y, width, height = frameRect
        # Store the rects for the hyperlink lines
        self._hyperlinkRect, self._hyperlinkWeb = [], []
        classParent = self._classParent

        # Retrieve the colours for the blended triple-gradient background
        topColour, middleColour, bottomColour = classParent.GetTopGradientColour(), \
                                                classParent.GetMiddleGradientColour(), \
                                                classParent.GetBottomGradientColour()

        # Get the user options for header, bitmaps etc...
        drawHeader, drawFooter = classParent.GetDrawHeaderLine(), classParent.GetDrawFooterLine()
        topRect = wx.Rect(frameRect.x, frameRect.y, frameRect.width, frameRect.height/2)
        bottomRect = wx.Rect(frameRect.x, frameRect.y+frameRect.height/2, frameRect.width, frameRect.height/2+1)
        # Fill the triple-gradient
        dc.GradientFillLinear(topRect, topColour, middleColour, wx.SOUTH)
        dc.GradientFillLinear(bottomRect, middleColour, bottomColour, wx.SOUTH)

        header, headerBmp = classParent.GetHeader(), classParent.GetHeaderBitmap()
        headerFont, messageFont, footerFont, hyperlinkFont = classParent.GetHeaderFont(), classParent.GetMessageFont(), \
                                                             classParent.GetFooterFont(), classParent.GetHyperlinkFont()

        xPos, yPos = self._spacing, 0
        bmpXPos = bmpYPos = 0
        bmpHeight = textHeight = bmpWidth = 0

        if headerBmp and headerBmp.IsOk():
            # We got the header bitmap
            bmpHeight, bmpWidth = headerBmp.GetHeight(), headerBmp.GetWidth()
            bmpXPos = self._spacing

        if header:
            # We got the header text
            dc.SetFont(headerFont)
            textWidth, textHeight = dc.GetTextExtent(header)

        # Calculate the header height
        height = max(textHeight, bmpHeight)
        if header:
            dc.DrawText(header, bmpXPos+bmpWidth+self._spacing, (height-textHeight+self._spacing)/2)
        if headerBmp and headerBmp.IsOk():
            dc.DrawBitmap(headerBmp, bmpXPos, (height-bmpHeight+self._spacing)/2, True)

        if header or (headerBmp and headerBmp.IsOk()):
            yPos += height
            if drawHeader:
                # Draw the separator line after the header
                dc.SetPen(wx.GREY_PEN)
                dc.DrawLine(self._spacing, yPos+self._spacing, width-self._spacing, yPos+self._spacing)

        # Get the big body image (if any)
        embeddedImage = classParent.GetBodyImage()
        bmpWidth = bmpHeight = -1
        if embeddedImage and embeddedImage.IsOk():
            bmpWidth, bmpHeight = embeddedImage.GetWidth(), embeddedImage.GetHeight()

        # A bunch of calculations to draw the main body message
        messageHeight = 0
        textSpacing = (bmpWidth > 0 and [3*self._spacing] or [2*self._spacing])[0]
        lines = classParent.GetMessage().split("\n")
        yText = yPos
        normalText = wx.SystemSettings_GetColour(wx.SYS_COLOUR_MENUTEXT)
        hyperLinkText = wx.BLUE

        for indx, line in enumerate(lines):
            # Loop over all the lines in the message
            isLink = False
            dc.SetTextForeground(normalText)
            if line.startswith("</b>"):      # is a bold line
                line = line[4:]
                font = MakeBold(messageFont)
                dc.SetFont(font)
            elif line.startswith("</l>"):    # is a link
                dc.SetFont(hyperlinkFont)
                isLink = True
                line, hl = ExtractLink(line)
                dc.SetTextForeground(hyperLinkText)
            else:
                # Is a normal line
                dc.SetFont(messageFont)

            textWidth, textHeight = dc.GetTextExtent(line)
            if textHeight == 0:
                textWidth, textHeight = dc.GetTextExtent("a")

            messageHeight += textHeight

            xText = (bmpWidth > 0 and [bmpWidth+2*self._spacing] or [self._spacing])[0]
            yText += textHeight/2+self._spacing

            dc.DrawText(line, xText, yText)
            if isLink:
                # Store the hyperlink rectangle and link
                self._hyperlinkRect.append(wx.Rect(xText, yText, textWidth, textHeight))
                self._hyperlinkWeb.append(hl)

            if indx == 0:
                messagePos = yText

        toAdd = 0
        if bmpHeight > textHeight:
            yPos += 2*self._spacing + bmpHeight
            toAdd = self._spacing
        else:
            yPos += messageHeight + 2*self._spacing

        yText = max(messageHeight, bmpHeight+2*self._spacing)
        if embeddedImage and embeddedImage.IsOk():
            # Draw the main body image
            dc.DrawBitmap(embeddedImage, self._spacing, messagePos, True)

        footer, footerBmp = classParent.GetFooter(), classParent.GetFooterBitmap()
        bmpHeight = bmpWidth = textHeight = textWidth = 0
        bmpXPos = bmpYPos = 0

        if footerBmp and footerBmp.IsOk():
            # Got the footer bitmap
            bmpHeight, bmpWidth = footerBmp.GetHeight(), footerBmp.GetWidth()
            bmpXPos = self._spacing

        if footer:
            # Got the footer text
            dc.SetFont(footerFont)
            textWidth, textHeight = dc.GetTextExtent(footer)

        if textHeight or bmpHeight:
            if drawFooter:
                # Draw the separator line before the footer
                dc.SetPen(wx.GREY_PEN)
                dc.DrawLine(self._spacing, yPos-self._spacing/2+toAdd, width-self._spacing, yPos-self._spacing/2+toAdd)

        # Draw the footer and footer bitmap (if any)
        dc.SetTextForeground(normalText)
        height = max(textHeight, bmpHeight)
        yPos += toAdd
        if footer:
            dc.DrawText(footer, bmpXPos+bmpWidth+self._spacing, yPos + (height-textHeight+self._spacing)/2)
        if footerBmp and footerBmp.IsOk():
            dc.DrawBitmap(footerBmp, bmpXPos, yPos + (height-bmpHeight+self._spacing)/2, True)


    def OnEraseBackground(self, event):
        """
        Handles the ``wx.EVT_ERASE_BACKGROUND`` event for L{SuperToolTip}.

        :param `event`: a `wx.EraseEvent` event to be processed.

        :note: This method is intentionally empty to reduce flicker.
        """

        # This is intentionally empty to reduce flicker
        pass


    def OnSize(self, event):
        """
        Handles the ``wx.EVT_SIZE`` event for L{SuperToolTip}.

        :param `event`: a `wx.SizeEvent` event to be processed.
        """

        self.Refresh()
        event.Skip()


    def OnMouseMotion(self, event):
        """
        Handles the ``wx.EVT_MOTION`` event for L{SuperToolTip}.

        :param `event`: a `wx.MouseEvent` event to be processed.
        """

        x, y = event.GetPosition()
        for rect in self._hyperlinkRect:
            if rect.Contains((x, y)):
                # We are over one hyperlink...
                self.SetCursor(wx.StockCursor(wx.CURSOR_HAND))
                self._wasOnLink = True
                return

        if self._wasOnLink:
            # Restore the normal cursor
            self._wasOnLink = False
            self.SetCursor(wx.NullCursor)


    def OnDestroy(self, event):
        """
        Handles the ``wx.EVT_LEFT_DOWN``, ``wx.EVT_LEFT_DCLICK`` and ``wx.EVT_KILL_FOCUS``
        events for L{SuperToolTip}. All these events destroy the L{SuperToolTip},
        unless the user clicked on one hyperlink.

        :param `event`: a `wx.MouseEvent` or a `wx.FocusEvent` event to be processed.
        """

        if not isinstance(event, wx.MouseEvent):
            # We haven't clicked a link
            self.Destroy()
            return

        x, y = event.GetPosition()
        for indx, rect in enumerate(self._hyperlinkRect):
            if rect.Contains((x, y)):
                # Run the webbrowser with the clicked link
                webbrowser.open_new_tab(self._hyperlinkWeb[indx])
                return

        if self._classParent.GetUseFade():
            # Fade out...
            self.StartAlpha(False)
        else:
            self.Destroy()


    def StartAlpha(self, isShow):
        """
        Start the timer which set the alpha channel for L{SuperToolTip}.

        :param `isShow`: whether L{SuperToolTip} is being shown or deleted.

        :note: This method is available only on Windows and requires Mark Hammond's
         pywin32 package.
        """

        if self._alphaTimer.IsRunning():
            return

        # Calculate starting alpha value and its step
        self.amount = (isShow and [0] or [255])[0]
        self.delta = (isShow and [5] or [-5])[0]
        # Start the timer
        self._alphaTimer.Start(30)


    def SetFont(self, font):
        """
        Sets the L{SuperToolTip} font globally.

        :param `font`: the font to set.
        """

        wx.PopupWindow.SetFont(self, font)
        self._classParent.InitFont()
        self.Invalidate()


    def Invalidate(self):
        """ Invalidate L{SuperToolTip} size and repaint it. """

        if not self._classParent.GetMessage():
            # No message yet...
            return

        self.CalculateBestSize()
        self.Refresh()


    def DropShadow(self, drop=True):
        """
        Adds a shadow under the window.

        :param `drop`: whether to drop a shadow or not.

        :note: This method is available only on Windows and requires Mark Hammond's
         pywin32 package.
        """

        if not _libimported:
            # No Mark Hammond's win32all extension
            return

        if wx.Platform != "__WXMSW__":
            # This works only on Windows XP
            return

        hwnd = self.GetHandle()

        # Create a rounded rectangle region
        size = self.GetSize()
        if drop:
            if hasattr(win32gui, "CreateRoundRectRgn"):
                rgn = win32gui.CreateRoundRectRgn(0, 0, size.x, size.y, 9, 9)
                win32gui.SetWindowRgn(hwnd, rgn, True)

        CS_DROPSHADOW = 0x00020000
        # Load the user32 library
        if not hasattr(self, "_winlib"):
            self._winlib = win32api.LoadLibrary("user32")

        csstyle = win32api.GetWindowLong(hwnd, win32con.GCL_STYLE)
        if drop:
            if csstyle & CS_DROPSHADOW:
                return
            else:
                csstyle |= CS_DROPSHADOW     #Nothing to be done
        else:
            csstyle &= ~CS_DROPSHADOW

        # Drop the shadow underneath the window
        GCL_STYLE= -26
        cstyle= win32gui.GetClassLong(hwnd, GCL_STYLE)
        if drop:
            if cstyle & CS_DROPSHADOW == 0:
                win32api.SetClassLong(hwnd, GCL_STYLE, cstyle | CS_DROPSHADOW)
        else:
            win32api.SetClassLong(hwnd, GCL_STYLE, cstyle &~ CS_DROPSHADOW)


    def AlphaCycle(self, event):
        """
        Handles the ``wx.EVT_TIMER`` event for L{SuperToolTip}.

        :param `event`: a `wx.TimerEvent` event to be processed.
        """

        # Increase (or decrease) the alpha channel
        self.amount += self.delta

        if self.amount > 255 or self.amount < 0:
            # We're done, stop the timer
            self._alphaTimer.Stop()
            if self.amount < 0:
                # Destroy the SuperToolTip, we are fading out
                self.Destroy()
            return

        # Make the SuperToolTip more or less transparent
        self.MakeWindowTransparent(self.amount)
        if not self.IsShown():
            self.Show()


    def MakeWindowTransparent(self, amount):
        """
        Makes the L{SuperToolTip} window transparent.

        :param `amount`: the alpha channel value.

        :note: This method is available only on Windows and requires Mark Hammond's
         pywin32 package.
        """

        if not _libimported:
            # No way, only Windows XP with Mark Hammond's win32all
            return

        # this API call is not in all SDKs, only the newer ones, so
        # we will runtime bind this
        if wx.Platform != "__WXMSW__":
            return

        hwnd = self.GetHandle()

        if not hasattr(self, "_winlib"):
            self._winlib = win32api.LoadLibrary("user32")

        pSetLayeredWindowAttributes = win32api.GetProcAddress(self._winlib,
                                                              "SetLayeredWindowAttributes")

        if pSetLayeredWindowAttributes == None:
            return

        exstyle = win32api.GetWindowLong(hwnd, win32con.GWL_EXSTYLE)
        if 0 == (exstyle & 0x80000):
            win32api.SetWindowLong(hwnd, win32con.GWL_EXSTYLE, exstyle | 0x80000)

        winxpgui.SetLayeredWindowAttributes(hwnd, 0, amount, 2)


    def CalculateBestSize(self):
        """ Calculates the L{SuperToolTip} window best size. """

        # See the OnPaint method for explanations...
        maxWidth = maxHeight = 0
        dc = wx.ClientDC(self)

        classParent = self._classParent
        header, headerBmp = classParent.GetHeader(), classParent.GetHeaderBitmap()

        textHeight, bmpHeight = 0, 0
        headerFont, messageFont, footerFont, hyperlinkFont = classParent.GetHeaderFont(), classParent.GetMessageFont(), \
                                                             classParent.GetFooterFont(), classParent.GetHyperlinkFont()
        if header:
            dc.SetFont(headerFont)
            textWidth, textHeight = dc.GetTextExtent(header)
            maxWidth = max(maxWidth, textWidth + 2*self._spacing)
            maxHeight += self._spacing/2
        if headerBmp and headerBmp.IsOk():
            maxWidth += headerBmp.GetWidth() + 2*self._spacing
            bmpHeight = headerBmp.GetHeight()
            if not header:
                maxHeight += self._spacing/2

        maxHeight += max(textHeight, bmpHeight)
        if textHeight or bmpHeight:
            maxHeight += self._spacing/2

        # See the OnPaint method for explanations...
        bmpWidth = bmpHeight = -1
        embeddedImage = classParent.GetBodyImage()
        if embeddedImage and embeddedImage.IsOk():
            bmpWidth, bmpHeight = embeddedImage.GetWidth(), embeddedImage.GetHeight()

        messageHeight = 0
        textSpacing = (bmpWidth and [3*self._spacing] or [2*self._spacing])[0]
        lines = classParent.GetMessage().split("\n")

        for line in lines:
            if line.startswith("</b>"):      # is a bold line
                font = MakeBold(messageFont)
                dc.SetFont(font)
                line = line[4:]
            elif line.startswith("</l>"):    # is a link
                dc.SetFont(hyperlinkFont)
                line, hl = ExtractLink(line)
            else:
                dc.SetFont(messageFont)

            textWidth, textHeight = dc.GetTextExtent(line)
            if textHeight == 0:
                textWidth, textHeight = dc.GetTextExtent("a")

            maxWidth = max(maxWidth, textWidth + textSpacing + bmpWidth)
            messageHeight += textHeight

        # See the OnPaint method for explanations...
        messageHeight = max(messageHeight, bmpHeight)
        maxHeight += messageHeight
        toAdd = 0
        if bmpHeight > textHeight:
            maxHeight += 2*self._spacing
            toAdd = self._spacing
        else:
            maxHeight += 2*self._spacing

        footer, footerBmp = classParent.GetFooter(), classParent.GetFooterBitmap()
        textHeight, bmpHeight = 0, 0

        # See the OnPaint method for explanations...
        if footer:
            dc.SetFont(footerFont)
            textWidth, textHeight = dc.GetTextExtent(footer)
            maxWidth = max(maxWidth, textWidth + 2*self._spacing)
            maxHeight += self._spacing/2

        if footerBmp and footerBmp.IsOk():
            bmpWidth, bmpHeight = footerBmp.GetWidth(), footerBmp.GetHeight()
            maxWidth = max(maxWidth, textWidth + 3*self._spacing + bmpWidth)
            if not footer:
                maxHeight += self._spacing/2

        if textHeight or bmpHeight:
            maxHeight += self._spacing/2 + max(textHeight, bmpHeight)

        maxHeight += toAdd
        self.SetSize((maxWidth, maxHeight))

    def CalculateBestPosition(self,widget):
        screen = wx.ClientDisplayRect()[2:]
        left,top = widget.ClientToScreenXY(0,0)
        right,bottom = widget.ClientToScreenXY(*widget.GetClientRect()[2:])
        size = self.GetSize()
        if right+size[0]>screen[0]:
            xpos = left-size[0]
        else:
            xpos = right
        if bottom+size[1]>screen[1]:
            ypos = top-size[1]
        else:
            ypos = bottom
        self.SetPosition((xpos,ypos))


# Handle Mac and Windows/GTK differences...

if wx.Platform == "__WXMAC__":

    class ToolTipWindow(wx.Frame, ToolTipWindowBase):
        """ Popup window that works on wxMac. """

        def __init__(self, parent, classParent):
            """
            Default class constructor.

            :param `parent`: the L{SuperToolTip} parent widget;
            :param `classParent`: the L{SuperToolTip} class object.
            """

            wx.Frame.__init__(self, parent, style=wx.NO_BORDER|wx.FRAME_FLOAT_ON_PARENT|wx.FRAME_NO_TASKBAR|wx.POPUP_WINDOW)
            # Call the base class
            ToolTipWindowBase.__init__(self, parent, classParent)

else:

    class ToolTipWindow(ToolTipWindowBase, wx.PopupWindow):
        """
        A simple `wx.PopupWindow` that holds fancy tooltips.
        Not available on Mac as `wx.PopupWindow` is not implemented there.
        """

        def __init__(self, parent, classParent):
            """
            Default class constructor.

            :param `parent`: the L{SuperToolTip} parent widget;
            :param `classParent`: the L{SuperToolTip} class object.
            """

            wx.PopupWindow.__init__(self, parent)
            # Call the base class
            ToolTipWindowBase.__init__(self, parent, classParent)


class SuperToolTip(object):
    """
    The main class for L{SuperToolTip}, which holds all the methods
    and setters/getters available to the user.
    """

    def __init__(self, message, bodyImage=wx.NullBitmap, header="", headerBmp=wx.NullBitmap,
                 footer="", footerBmp=wx.NullBitmap):
        """
        Default class constructor.

        :param `message`: the main message in L{SuperToolTip} body;
        :param `bodyImage`: the image in the L{SuperToolTip} body;
        :param `header`: the header text;
        :param `headerBmp`: the header bitmap;
        :param `footer`: the footer text;
        :param `footerBmp`: the footer bitmap.
        """

        self._superToolTip = None

        # Set all the initial options
        self.SetMessage(message)
        self.SetBodyImage(bodyImage)
        self.SetHeader(header)
        self.SetHeaderBitmap(headerBmp)
        self.SetFooter(footer)
        self.SetFooterBitmap(footerBmp)
        self._dropShadow = False
        self._useFade = False

        self._topLine = False
        self._bottomLine = False

        self.InitFont()

        # Get the running applications
        self._runningApp = wx.GetApp()
        self._runningApp.__superToolTip = True

        # Build a couple of timers...
        self._startTimer = wx.PyTimer(self.OnStartTimer)
        self._endTimer = wx.PyTimer(self.OnEndTimer)

        self.SetStartDelay()
        self.SetEndDelay()
        self.ApplyStyle("XP Blue")


    def SetTarget(self, widget):
        """
        Sets the target window for L{SuperToolTip}.

        :param `widget`: the widget to which L{SuperToolTip} is associated.
        """

        self._widget = widget

        self._widget.Bind(wx.EVT_ENTER_WINDOW, self.OnWidgetEnter)
        self._widget.Bind(wx.EVT_LEAVE_WINDOW, self.OnWidgetLeave)


    def GetTarget(self):
        """ Returns the target window for L{SuperToolTip}. """

        if not hasattr(self, "_widget"):
            raise Exception("\nError: the widget target for L{SuperToolTip} has not been set.")

        return self._widget


    def SetStartDelay(self, delay=1):
        """
        Sets the time delay (in seconds) after which the L{SuperToolTip} is created.

        :param `delay`: the delay in seconds.
        """

        self._startDelayTime = float(delay)


    def GetStartDelay(self):
        """ Returns the tim delay (in seconds) after which the L{SuperToolTip} is created."""

        return self._startDelayTime


    def SetEndDelay(self, delay=1e6):
        """
        Sets the delay time (in seconds) after which the L{SuperToolTip} is destroyed.

        :param `delay`: the delay in seconds.
        """

        self._endDelayTime = float(delay)


    def GetEndDelay(self):
        """ Returns the delay time (in seconds) after which the L{SuperToolTip} is destroyed."""

        return self._endDelayTime


    def OnWidgetEnter(self, event):
        """
        Starts the L{SuperToolTip} timer for creation, handles the ``wx.EVT_ENTER_WINDOW`` event.

        :param `event`: a `wx.MouseEvent` event to be processed.
        """

        if self._superToolTip:
            # Not yet created
            return

        if not self._runningApp.__superToolTip:
            # The running app doesn't want tooltips...
            return

        if self._startTimer.IsRunning():
            # We are already running
            event.Skip()
            return

        self._startTimer.Start(self._startDelayTime*1000)
        event.Skip()


    def OnWidgetLeave(self, event):
        """
        Handles the ``wx.EVT_LEAVE_WINDOW`` event for the target widgets.

        :param `event`: a `wx.MouseEvent` event to be processed.
        """

        pos = wx.GetMousePosition()
        realPos = self._widget.ScreenToClient(pos)
        rect = self._widget.GetClientRect()

        if rect.Contains(realPos):
            # We get fake leave events...
            event.Skip()
            return

        if self._superToolTip:
            if self.GetUseFade():
                # Fade out...
                self._superToolTip.StartAlpha(False)
            else:
                self._superToolTip.Destroy()

        self._startTimer.Stop()
        self._endTimer.Stop()

        event.Skip()

    def GetTipWindow(self):
        """ Return the TipWindow, will return None if not yet created """

        return self._superToolTip


    def OnStartTimer(self):
        """ The creation time has expired, create the L{SuperToolTip}. """

        # target widget might already be destroyed
        if not self._widget:
            self._startTimer.Stop()
            return

        tip = ToolTipWindow(self._widget, self)
        self._superToolTip = tip
        self._superToolTip.CalculateBestSize()
        self._superToolTip.CalculateBestPosition(self._widget)
        self._superToolTip.DropShadow(self.GetDropShadow())

        if self.GetUseFade():
            self._superToolTip.StartAlpha(True)
        else:
            self._superToolTip.Show()

        self._startTimer.Stop()
        self._endTimer.Start(self._endDelayTime*1000)


    def OnEndTimer(self):
        """ The show time for L{SuperToolTip} has expired, destroy the L{SuperToolTip}. """

        if self._superToolTip:
            if self.GetUseFade():
                self._superToolTip.StartAlpha(False)
            else:
                self._superToolTip.Destroy()

        self._endTimer.Stop()


    def DoShowNow(self):
        """ Create the L{SuperToolTip} immediately. """

        if self._superToolTip:
            # need to destroy it if already exists,
            # otherwise we might end up with many of them
            self._superToolTip.Destroy()

        tip = ToolTipWindow(self._widget, self)
        self._superToolTip = tip
        self._superToolTip.CalculateBestSize()
        self._superToolTip.CalculateBestPosition(self._widget)
        self._superToolTip.DropShadow(self.GetDropShadow())

        # need to stop this, otherwise we get into trouble when leaving the window
        self._startTimer.Stop()

        if self.GetUseFade():
            self._superToolTip.StartAlpha(True)
        else:
            self._superToolTip.Show()

        self._endTimer.Start(self._endDelayTime*1000)


    def OnDestroy(self, event):
        """ Handles the L{SuperToolTip} target destruction. """

        if self._superToolTip:
            # Unbind the events!
            self._widget.Unbind(wx.EVT_LEAVE_WINDOW)
            self._widget.Unbind(wx.EVT_ENTER_WINDOW)

            self._superToolTip.Destroy()
            del self._superToolTip
            self._superToolTip = None


    def SetHeaderBitmap(self, bmp):
        """
        Sets the header bitmap for L{SuperToolTip}.

        :param `bmp`: the header bitmap, a valid `wx.Bitmap` object.
        """

        self._headerBmp = bmp
        if self._superToolTip:
            self._superToolTip.Invalidate()


    def GetHeaderBitmap(self):
        """ Returns the header bitmap. """

        return self._headerBmp


    def SetHeader(self, header):
        """
        Sets the header text.

        :param `header`: the header text to display.
        """

        self._header = header
        if self._superToolTip:
            self._superToolTip.Invalidate()


    def GetHeader(self):
        """ Returns the header text. """

        return self._header


    def SetDrawHeaderLine(self, draw):
        """
        Sets whether to draw a separator line after the header or not.

        :param `draw`: ``True`` to draw a separator line after the header, ``False``
         otherwise.
        """

        self._topLine = draw
        if self._superToolTip:
            self._superToolTip.Refresh()


    def GetDrawHeaderLine(self):
        """ Returns whether the separator line after the header is drawn or not. """

        return self._topLine


    def SetBodyImage(self, bmp):
        """
        Sets the main body bitmap for L{SuperToolTip}.

        :param `bmp`: the body bitmap, a valid `wx.Bitmap` object.
        """

        self._embeddedImage = bmp
        if self._superToolTip:
            self._superToolTip.Invalidate()


    def GetBodyImage(self):
        """ Returns the main body bitmap used in L{SuperToolTip}. """

        return self._embeddedImage


    def SetDrawFooterLine(self, draw):
        """
        Sets whether to draw a separator line before the footer or not.

        :param `draw`: ``True`` to draw a separator line before the footer, ``False``
         otherwise.
        """

        self._bottomLine = draw
        if self._superToolTip:
            self._superToolTip.Refresh()


    def GetDrawFooterLine(self):
        """ Returns whether the separator line before the footer is drawn or not. """

        return self._bottomLine


    def SetFooterBitmap(self, bmp):
        """
        Sets the footer bitmap for L{SuperToolTip}.

        :param `bmp`: the footer bitmap, a valid `wx.Bitmap` object.
        """

        self._footerBmp = bmp
        if self._superToolTip:
            self._superToolTip.Invalidate()


    def GetFooterBitmap(self):
        """ Returns the footer bitmap. """

        return self._footerBmp


    def SetFooter(self, footer):
        """
        Sets the footer text.

        :param `footer`: the footer text to display.
        """

        self._footer = footer
        if self._superToolTip:
            self._superToolTip.Invalidate()


    def GetFooter(self):
        """ Returns the footer text. """

        return self._footer


    def SetMessage(self, message):
        """
        Sets the main body message for L{SuperToolTip}.

        :param `message`: the message to display in the body.
        """

        self._message = message
        if self._superToolTip:
            self._superToolTip.Invalidate()


    def GetMessage(self):
        """ Returns the main body message in L{SuperToolTip}. """

        return self._message


    def SetTopGradientColour(self, colour):
        """
        Sets the top gradient colour for L{SuperToolTip}.

        :param `colour`: the colour to use as top colour, a valid `wx.Colour` object.
        """

        self._topColour = colour
        if self._superToolTip:
            self._superToolTip.Refresh()


    def SetMiddleGradientColour(self, colour):
        """
        Sets the middle gradient colour for L{SuperToolTip}.

        :param `colour`: the colour to use as middle colour, a valid `wx.Colour` object.
        """

        self._middleColour = colour
        if self._superToolTip:
            self._superToolTip.Refresh()


    def SetBottomGradientColour(self, colour):
        """
        Sets the bottom gradient colour for L{SuperToolTip}.

        :param `colour`: the colour to use as bottom colour, a valid `wx.Colour` object.
        """

        self._bottomColour = colour
        if self._superToolTip:
            self._superToolTip.Refresh()


    def SetTextColour(self, colour):
        """
        Sets the text colour for L{SuperToolTip}.

        :param `colour`: the colour to use as text colour, a valid `wx.Colour` object.
        """

        self._textColour = colour
        if self._superToolTip:
            self._superToolTip.Refresh()


    def GetTopGradientColour(self):
        """ Returns the top gradient colour. """

        return self._topColour


    def GetMiddleGradientColour(self):
        """ Returns the middle gradient colour. """

        return self._middleColour


    def GetBottomGradientColour(self):
        """ Returns the bottom gradient colour. """

        return self._bottomColour


    def GetTextColour(self):
        """ Returns the text colour. """

        return self._textColour


    SetTopGradientColor = SetTopGradientColour
    SetMiddleGradientColor = SetMiddleGradientColour
    SetBottomGradientColor = SetBottomGradientColour
    GetTopGradientColor = GetTopGradientColour
    GetMiddleGradientColor = GetMiddleGradientColour
    GetBottomGradientColor = GetBottomGradientColour
    SetTextColor = SetTextColour
    GetTextColor = GetTextColour


    def InitFont(self):
        """ Initalizes the fonts for L{SuperToolTip}. """

        self._messageFont = wx.SystemSettings_GetFont(wx.SYS_DEFAULT_GUI_FONT)
        self._headerFont = wx.SystemSettings_GetFont(wx.SYS_DEFAULT_GUI_FONT)
        self._headerFont.SetWeight(wx.BOLD)
        self._footerFont = wx.SystemSettings_GetFont(wx.SYS_DEFAULT_GUI_FONT)
        self._footerFont.SetWeight(wx.BOLD)
        self._hyperlinkFont = wx.SystemSettings_GetFont(wx.SYS_DEFAULT_GUI_FONT)
        self._hyperlinkFont.SetWeight(wx.BOLD)
        self._hyperlinkFont.SetUnderlined(True)


    def SetMessageFont(self, font):
        """
        Sets the font for the main body message.

        :param `font`: the font to use for the main body message, a valid `wx.Font`
         object.
        """

        self._messageFont = font
        if self._superToolTip:
            self._superToolTip.Invalidate()


    def SetHeaderFont(self, font):
        """
        Sets the font for the header text.

        :param `font`: the font to use for the header text, a valid `wx.Font`
         object.
        """

        self._headerFont = font
        if self._superToolTip:
            self._superToolTip.Invalidate()


    def SetFooterFont(self, font):
        """
        Sets the font for the footer text.

        :param `font`: the font to use for the footer text, a valid `wx.Font`
         object.
        """

        self._footerFont = font
        if self._superToolTip:
            self._superToolTip.Invalidate()


    def SetHyperlinkFont(self, font):
        """
        Sets the font for the hyperlink text.

        :param `font`: the font to use for the hyperlink text, a valid `wx.Font`
         object.
        """

        self._hyperlinkFont = font
        if self._superToolTip:
            self._superToolTip.Invalidate()


    def GetMessageFont(self):
        """ Returns the font used in the main body message. """

        return self._messageFont


    def GetHeaderFont(self):
        """ Returns the font used for the header text. """

        return self._headerFont


    def GetFooterFont(self):
        """ Returns the font used for the footer text. """

        return self._footerFont


    def GetHyperlinkFont(self):
        """ Returns the font used for the hyperlink text. """

        return self._hyperlinkFont


    def SetDropShadow(self, drop):
        """
        Whether to draw a shadow below L{SuperToolTip} or not.

        :param `drop`: ``True`` to drop a shadow below the control, ``False`` otherwise.

        :note: This method is available only on Windows and requires Mark Hammond's
         pywin32 package.
        """

        self._dropShadow = drop
        if self._superToolTip:
            self._superToolTip.Invalidate()


    def GetDropShadow(self):
        """
        Returns whether a shadow below L{SuperToolTip} is drawn or not.

        :note: This method is available only on Windows and requires Mark Hammond's
         pywin32 package.
        """

        return self._dropShadow


    def SetUseFade(self, fade):
        """
        Whether to use a fade in/fade out effect or not.

        :param `fade`: ``True`` to use a fade in/fade out effect, ``False`` otherwise.

        :note: This method is available only on Windows and requires Mark Hammond's
         pywin32 package.
        """

        self._useFade = fade


    def GetUseFade(self):
        """
        Returns whether a fade in/fade out effect is used or not.

        :note: This method is available only on Windows and requires Mark Hammond's
         pywin32 package.
        """

        return self._useFade


    def ApplyStyle(self, style):
        """
        Applies none of the predefined styles.

        :param `style`: one of the predefined styles available at the
         beginning of the module.
        """

        if style not in _colourSchemes:
            raise Exception("Invalid style '%s' selected"%style)

        top, middle, bottom, text = _colourSchemes[style]
        self._topColour = top
        self._middleColour = middle
        self._bottomColour = bottom
        self._textColour = text

        if self._superToolTip:
            self._superToolTip.Refresh()


    def EnableTip(self, enable=True):
        """
        Globally (application-wide) enables/disables L{SuperToolTip}.

        :param `enable`: ``True`` to enable L{SuperToolTip} globally, ``False`` otherwise.
        """

        wx.GetApp().__superToolTip = enable
        if not enable and self._superToolTip:
            self._superToolTip.Destroy()
            self._superToolTip = None
            del self._superToolTip