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[wxWidgets.git] / wxPython / demo / ColourDB.py

diff --git a/wxPython/demo/ColourDB.py b/wxPython/demo/ColourDB.py
index f23e294fe5d3bba166f2eb17ec490f4b2eff0923..6faf3e464ba702aa50a5fef21334950feddffc66 100644 (file)
--- a/wxPython/demo/ColourDB.py
+++ b/wxPython/demo/ColourDB.py
@@ -1,43 +1,65 @@
 
 

-from wxPython.wx import *
-from wxPython.lib import colourdb
+import wx
+import wx.lib.colourdb

 
 import images
 
 
 
 import images
 
 

-# This loads a whole bunch of new color names and values
-# into wxTheColourDatabase
-
-colourdb.updateColourDB()
-

 #----------------------------------------------------------------------
 
 #----------------------------------------------------------------------
 

-class TestWindow(wxScrolledWindow):
+class TestWindow(wx.ScrolledWindow):

     def __init__(self, parent):
     def __init__(self, parent):

-        wxScrolledWindow.__init__(self, parent, -1)
+        wx.ScrolledWindow.__init__(self, parent, -1)
+
+        # Populate our color list
+        self.clrList = wx.lib.colourdb.getColourList()

 
 

-        self.clrList = colourdb.getColourList()
+        # Just for style points, we'll use this as a background image.
+        #self.clrList.sort()

         self.bg_bmp = images.getGridBGBitmap()
 
         self.bg_bmp = images.getGridBGBitmap()
 

-        EVT_PAINT(self, self.OnPaint)
-        EVT_ERASE_BACKGROUND(self, self.OnEraseBackground)
+        # This could also be done by getting the window's default font;
+        # either way, we need to have a font loaded for later on.

         #self.SetBackgroundColour("WHITE")
         #self.SetBackgroundColour("WHITE")

+        self.font = wx.Font(10, wx.SWISS, wx.NORMAL, wx.NORMAL)

 
 

-        self.font = wxFont(10, wxSWISS, wxNORMAL, wxNORMAL)
-        dc = wxClientDC(self)
+        # Create drawing area and set its font
+        dc = wx.ClientDC(self)

         dc.SetFont(self.font)
 
         dc.SetFont(self.font)
 

-        w,h,d,e = dc.GetFullTextExtent("Wy") # a wide character and one that decends
+        # Using GetFullTextExtent(), we calculate a basic 'building block'
+        # that will be used to draw a depiction of the color list. We're
+        # using 'Wy' as the model becuase 'W' is a wide character and 'y' 
+        # has a descender. This constitutes a 'worst case' scenario, which means
+        # that no matter what we draw later, text-wise, we'll have room for it
+        w,h,d,e = dc.GetFullTextExtent("Wy") 
+
+        # Height plus descender

         self.textHeight = h + d
         self.textHeight = h + d

+
+        # Pad a little bit

         self.lineHeight = self.textHeight + 5
         self.lineHeight = self.textHeight + 5

+
+        # ... and this is the basic width.

         self.cellWidth = w
 
         self.cellWidth = w
 

+        # jmg 11/8/03: why 24?

         numCells = 24
         numCells = 24

-        self.SetScrollbars(self.cellWidth, self.lineHeight, numCells, len(self.clrList) + 2)
-
-
+        
+        # 'prep' our scroll bars.
+        self.SetScrollbars(
+            self.cellWidth, self.lineHeight, numCells, len(self.clrList) + 2
+            )
+            
+        # Event handlers - moved here so events won't fire before init is 
+        # finished.
+        self.SetBackgroundStyle(wx.BG_STYLE_CUSTOM)
+        self.Bind(wx.EVT_PAINT, self.OnPaint)
+        self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
+
+
+    # tile the background bitmap loaded in __init__()

     def TileBackground(self, dc):
     def TileBackground(self, dc):

-        # tile the background bitmap

         sz = self.GetClientSize()
         w = self.bg_bmp.GetWidth()
         h = self.bg_bmp.GetHeight()
         sz = self.GetClientSize()
         w = self.bg_bmp.GetWidth()
         h = self.bg_bmp.GetHeight()


@@ -48,23 +70,29 @@ class TestWindow(wxScrolledWindow):
         dx,  dy  = (spx * vsx) % w, (spy * vsy) % h
 
         x = -dx
         dx,  dy  = (spx * vsx) % w, (spy * vsy) % h
 
         x = -dx

+

         while x < sz.width:
             y = -dy
             while y < sz.height:
                 dc.DrawBitmap(self.bg_bmp, x, y)
                 y = y + h
         while x < sz.width:
             y = -dy
             while y < sz.height:
                 dc.DrawBitmap(self.bg_bmp, x, y)
                 y = y + h

-            x = x + w

 
 

+            x = x + w

 
 

+    # Redraw the background over a 'damaged' area.

     def OnEraseBackground(self, evt):
         dc = evt.GetDC()
     def OnEraseBackground(self, evt):
         dc = evt.GetDC()

+

         if not dc:
         if not dc:

-            dc = wxClientDC(self)
+            dc = wx.ClientDC(self)
+            rect = self.GetUpdateRegion().GetBox()
+            dc.SetClippingRect(rect)
+

         self.TileBackground(dc)
 
 
     def OnPaint(self, evt):
         self.TileBackground(dc)
 
 
     def OnPaint(self, evt):

-        dc = wxPaintDC(self)
+        dc = wx.PaintDC(self)

         self.PrepareDC(dc)
         self.Draw(dc, self.GetUpdateRegion(), self.GetViewStart())
 
         self.PrepareDC(dc)
         self.Draw(dc, self.GetUpdateRegion(), self.GetViewStart())
 


@@ -72,13 +100,15 @@ class TestWindow(wxScrolledWindow):
     def Draw(self, dc, rgn=None, vs=None):
         dc.BeginDrawing()
         dc.SetTextForeground("BLACK")
     def Draw(self, dc, rgn=None, vs=None):
         dc.BeginDrawing()
         dc.SetTextForeground("BLACK")

-        dc.SetPen(wxPen("BLACK", 1, wxSOLID))
+        dc.SetPen(wx.Pen("BLACK", 1, wx.SOLID))

         dc.SetFont(self.font)
         colours = self.clrList
         numColours = len(colours)
 
         if rgn:
         dc.SetFont(self.font)
         colours = self.clrList
         numColours = len(colours)
 
         if rgn:

-            # determine the subset that have been exposed and needs drawn
+            # determine the subset of the color list that has been exposed 
+            # and needs drawn. This is based on all the precalculation we
+            # did in __init__()

             rect = rgn.GetBox()
             pixStart = vs[1]*self.lineHeight + rect.y
             pixStop  = pixStart + rect.height
             rect = rgn.GetBox()
             pixStart = vs[1]*self.lineHeight + rect.y
             pixStop  = pixStart + rect.height


@@ -86,29 +116,86 @@ class TestWindow(wxScrolledWindow):
             stop = pixStop / self.lineHeight
         else:
             start = 0
             stop = pixStop / self.lineHeight
         else:
             start = 0

-            stop = len(numColours)
+            stop = numColours

 
         for line in range(max(0,start), min(stop,numColours)):
             clr = colours[line]
             y = (line+1) * self.lineHeight + 2
 
         for line in range(max(0,start), min(stop,numColours)):
             clr = colours[line]
             y = (line+1) * self.lineHeight + 2

+

             dc.DrawText(clr, self.cellWidth, y)
 
             dc.DrawText(clr, self.cellWidth, y)
 

-            brush = wxBrush(clr, wxSOLID)
+            brush = wx.Brush(clr, wx.SOLID)

             dc.SetBrush(brush)
             dc.SetBrush(brush)

-            dc.DrawRectangle(12 * self.cellWidth, y, 6 * self.cellWidth, self.textHeight)
+            dc.DrawRectangle(12 * self.cellWidth, y,
+                             6 * self.cellWidth, self.textHeight)

 
         dc.EndDrawing()
 
 
 
         dc.EndDrawing()
 
 

+# On wxGTK there needs to be a panel under wx.ScrolledWindows if they are
+# going to be in a wxNotebook. And, in this demo, we are.
+class TestPanel(wx.Panel):
+    def __init__(self, parent):
+        wx.Panel.__init__(self, parent, -1)
+        self.win = TestWindow(self)
+        self.Bind(wx.EVT_SIZE, self.OnSize)
+
+
+    def OnSize(self, evt):
+        self.win.SetSize(evt.GetSize())
+
+

 
 #----------------------------------------------------------------------
 
 
 def runTest(frame, nb, log):
 
 #----------------------------------------------------------------------
 
 
 def runTest(frame, nb, log):

-    win = TestWindow(nb)
+    # This loads a whole bunch of new color names and values
+    # into TheColourDatabase
+    #
+    # Note 11/24/03 - jg - I moved this into runTest() because
+    # there must be a wx.App existing before this function
+    # can be called - this is a change from 2.4 -> 2.5.
+    wx.lib.colourdb.updateColourDB()
+
+    win = TestPanel(nb)
+

     return win
 
 #----------------------------------------------------------------------
 
 overview = """
     return win
 
 #----------------------------------------------------------------------
 
 overview = """

+<html>
+<body>
+<B><font size=+2>ColourDB</font></b>
+
+<p>wxWindows maintains a database of standard RGB colours for a predefined 
+set of named colours (such as "BLACK'', "LIGHT GREY''). The application 
+may add to this set if desired by using Append. There is only one instance 
+of this class: <b>TheColourDatabase</b>.
+
+<p>The <code>colourdb</code> library is a lightweight API that pre-defines
+a multitude of colors for you to use 'out of the box', and this demo serves
+to show you these colors (it also serves as a handy reference).
+
+<p>A secondary benefit of this demo is the use of the <b>ScrolledWindow</b> class
+and the use of various *DC() classes, including background tiling and the use of
+font data to generate a "building block" type of construct for repetitive use.
+
+<p>
+<B><font size=+2>Important note</font></b>
+
+<p>
+With implementation of V2.5 and later, it is required to have a wx.App already
+initialized before <b><code>wx.updateColourDB()</code></b> can be called. 
+Trying to do otherwise will cause an exception to be raised.
+</body>
+</html>

 """
 """

+
+
+if __name__ == '__main__':
+    import sys,os
+    import run
+    run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
+