dc9876fb4a
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41574 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
201 lines
6.2 KiB
Python
201 lines
6.2 KiB
Python
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import wx
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import wx.lib.colourdb
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import images
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#----------------------------------------------------------------------
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class TestWindow(wx.ScrolledWindow):
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def __init__(self, parent):
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wx.ScrolledWindow.__init__(self, parent, -1)
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# Populate our color list
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self.clrList = wx.lib.colourdb.getColourInfoList()
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# Just for style points, we'll use this as a background image.
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self.bg_bmp = images.getGridBGBitmap()
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# This could also be done by getting the window's default font;
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# either way, we need to have a font loaded for later on.
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#self.SetBackgroundColour("WHITE")
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self.font = wx.Font(10, wx.SWISS, wx.NORMAL, wx.NORMAL)
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# Create drawing area and set its font
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dc = wx.ClientDC(self)
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dc.SetFont(self.font)
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# Using GetFullTextExtent(), we calculate a basic 'building block'
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# that will be used to draw a depiction of the color list. We're
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# using 'Wy' as the model becuase 'W' is a wide character and 'y'
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# has a descender. This constitutes a 'worst case' scenario, which means
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# that no matter what we draw later, text-wise, we'll have room for it
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w,h,d,e = dc.GetFullTextExtent("Wy")
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# Height plus descender
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self.textHeight = h + d
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# Pad a little bit
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self.lineHeight = self.textHeight + 5
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# ... and this is the basic width.
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self.cellWidth = w
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# jmg 11/8/03: why 24?
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numCells = 24
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# 'prep' our scroll bars.
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self.SetScrollbars(
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self.cellWidth, self.lineHeight, numCells, len(self.clrList) + 2
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)
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# Event handlers - moved here so events won't fire before init is
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# finished.
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self.SetBackgroundStyle(wx.BG_STYLE_CUSTOM)
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self.Bind(wx.EVT_PAINT, self.OnPaint)
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self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
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# tile the background bitmap loaded in __init__()
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def TileBackground(self, dc):
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sz = self.GetClientSize()
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w = self.bg_bmp.GetWidth()
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h = self.bg_bmp.GetHeight()
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# adjust for scrolled position
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spx, spy = self.GetScrollPixelsPerUnit()
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vsx, vsy = self.GetViewStart()
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dx, dy = (spx * vsx) % w, (spy * vsy) % h
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x = -dx
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while x < sz.width:
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y = -dy
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while y < sz.height:
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dc.DrawBitmap(self.bg_bmp, x, y)
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y = y + h
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x = x + w
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# Redraw the background over a 'damaged' area.
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def OnEraseBackground(self, evt):
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dc = evt.GetDC()
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if not dc:
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dc = wx.ClientDC(self)
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rect = self.GetUpdateRegion().GetBox()
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dc.SetClippingRect(rect)
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self.TileBackground(dc)
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def OnPaint(self, evt):
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dc = wx.PaintDC(self)
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self.PrepareDC(dc)
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self.Draw(dc, self.GetUpdateRegion(), self.GetViewStart())
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def Draw(self, dc, rgn=None, vs=None):
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dc.SetTextForeground("BLACK")
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dc.SetPen(wx.Pen("BLACK", 1, wx.SOLID))
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dc.SetFont(self.font)
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colours = self.clrList
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numColours = len(colours)
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if rgn:
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# determine the subset of the color list that has been exposed
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# and needs drawn. This is based on all the precalculation we
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# did in __init__()
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rect = rgn.GetBox()
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pixStart = vs[1]*self.lineHeight + rect.y
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pixStop = pixStart + rect.height
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start = pixStart / self.lineHeight - 1
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stop = pixStop / self.lineHeight
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else:
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start = 0
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stop = numColours
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for line in range(max(0,start), min(stop,numColours)):
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clr = colours[line][0]
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y = (line+1) * self.lineHeight + 2
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dc.DrawText(clr, self.cellWidth, y)
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brush = wx.Brush(clr, wx.SOLID)
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dc.SetBrush(brush)
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dc.DrawRectangle(10 * self.cellWidth, y,
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6 * self.cellWidth, self.textHeight)
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dc.DrawText(str(tuple(colours[line][1:])),
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18 * self.cellWidth, y)
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# On wxGTK there needs to be a panel under wx.ScrolledWindows if they are
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# going to be in a wxNotebook. And, in this demo, we are.
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class TestPanel(wx.Panel):
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def __init__(self, parent):
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wx.Panel.__init__(self, parent, -1)
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self.win = TestWindow(self)
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self.Bind(wx.EVT_SIZE, self.OnSize)
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def OnSize(self, evt):
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self.win.SetSize(evt.GetSize())
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#----------------------------------------------------------------------
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def runTest(frame, nb, log):
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# This loads a whole bunch of new color names and values
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# into TheColourDatabase
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#
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# Note 11/24/03 - jg - I moved this into runTest() because
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# there must be a wx.App existing before this function
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# can be called - this is a change from 2.4 -> 2.5.
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wx.lib.colourdb.updateColourDB()
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win = TestPanel(nb)
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return win
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#----------------------------------------------------------------------
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overview = """
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<html>
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<body>
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<B><font size=+2>ColourDB</font></b>
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<p>wxWindows maintains a database of standard RGB colours for a predefined
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set of named colours (such as "BLACK'', "LIGHT GREY''). The application
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may add to this set if desired by using Append. There is only one instance
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of this class: <b>TheColourDatabase</b>.
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<p>The <code>colourdb</code> library is a lightweight API that pre-defines
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a multitude of colors for you to use 'out of the box', and this demo serves
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to show you these colors (it also serves as a handy reference).
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<p>A secondary benefit of this demo is the use of the <b>ScrolledWindow</b> class
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and the use of various *DC() classes, including background tiling and the use of
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font data to generate a "building block" type of construct for repetitive use.
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<p>
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<B><font size=+2>Important note</font></b>
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<p>
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With implementation of V2.5 and later, it is required to have a wx.App already
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initialized before <b><code>wx.updateColourDB()</code></b> can be called.
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Trying to do otherwise will cause an exception to be raised.
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</body>
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</html>
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"""
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if __name__ == '__main__':
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import sys,os
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import run
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run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
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