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#1
October 27th, 2004, 03:40 PM
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Migrating to wxPython from TKinter
Interested in wxPython but I cannot find what I need concerning text highlighting or changing the colour of a word. You know! something like syntax highlighting
If anyone can give me a simple Hello World application that uses a simple regular expression, like searching the wxStyledTextCtrl for any occurrences of Hello then highlight it blue and any occurrence of World and highlight it red. Or if you don't want to sweet it out for me, show me the wxStyledTextCtrol methods that are responsible for text highlighting and might show compatibility with regular expressions. For Tkinter I use a small loop. 'compile' equals the regular expression mystring equals string to be searched, in this case its a string from Tkinters Textwidget itself. self.iterator = re.finditer(compile,mystring) for match in self.iterator: highlight(self.editor,match,hit) #func Strap this baby to a Textwidget first def config_tags(text): btags = text.bindtags() text.bindtags(btags[1:] + btags[:1]) text.tag_configure("hit",foreground="blue") text.tag_configure("hit1",foreground="red") #func highlights text widget based on regular expression match and a hit def highlight_all_text(text,match,hit): if match: regs = match.span()# regular expression, you know this first, last = regs pfirst = "1.0 + %d chars" % first plast = "1.0 + %d chars" % last text.tag_add(hit, pfirst, plast)# The magic happens here. text.yview_pickplace(pfirst) 
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#2
October 27th, 2004, 09:21 PM
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I seem to recall that wxPython actually has a syntax highlighting widget as a standard. I dunno, I never used wxPython much, but that is one thing I remember. I'm not 100% sure on it though.
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#3
October 28th, 2004, 06:17 PM
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wxStyledTextCtrl already has the ability to understand HTML type tags if you tell it to use an HTML lexer. The underlying scintilla core already supports many languages. All you have to do is tell it what language you are editing and what colour etc. you want tokens to be displayed with. It does the rest!
So: 1. Create a parent widget to hold the text widget 2. Define a lexer 3. Create the text widget and let it know what lexer to use 4. Define the colour font etc for each (predefined by Scintilla) token. 5. Copy the text into the widget with SetText() 6. Let the user edit it! Here are some key code fragments to give you a flavour. Code:
from wxPython.stc import *
class Custom:
#
def __init__(self):
self.defaultTabWidth = 4
self.useTabs = 0
self.lexerId = wxSTC_LEX_NULL
self.rightMargin = 68
self.breakChars = ' \t.,/\\<>?!@#$%^&*(){}[]+\'"'
def getLexerId(self):
return self.lexerId
def getDefaultTabWidth(self):
return self.defaultTabWidth
def getUseTabs(self):
return self.useTabs
def getRightMargin(self):
return self.rightMargin
def getBreakChars(self):
return self.breakChars
def do_auto_indent(self, buffer, usingTabs, currentTabWidth):
return 1
class HtmlCustom(Custom):
def __init__(self):
Custom.__init__(self)
self.defaultTabWidth = 4
self.useTabs = 0
self.lexerId = wxSTC_LEX_HTML
......
And in the main class we have
self.Text = wxStyledTextCtrl(id=wxID_WXFRAME1TEXT, name='Text',
parent=self.mainwindow, pos=wxPoint(0, 0), size=wxSize(623, 350),
style=0)
......
self.fileCustom = HtmlCustom()
self.Text.StyleSetSpec(wxSTC_STYLE_DEFAULT, "size:%d,face:%s" % (pb, face3))
self.Text.StyleSetSpec(wxSTC_H_TAG, "size:%d,bold,face:%s,fore:#0000FF" % (pb+2, face1))
self.Text.StyleSetSpec(wxSTC_H_TAGUNKNOWN, "face:%s,italic,fore:#FF0000,size:%d" % (face2, pb))
self.Text.StyleSetSpec(wxSTC_H_ATTRIBUTE, "face:%s,bold,size:%d" % (face2, pb+2))
self.Text.StyleSetSpec(wxSTC_H_ATTRIBUTEUNKNOWN, "face:%s,size:%d" % (face1, pb-1))
self.Text.StyleSetSpec(wxSTC_H_COMMENT, "face:%s,size:%d,back:#ffff00" % (face1, pb-1))
self.Text.StyleSetSpec(wxSTC_H_SCRIPT, "face:%s,size:%d" % (face1, pb-1))
self.Text.SetUseTabs(self.fileCustom.getUseTabs())
self.Text.currentTabWidth = self.fileCustom.getDefaultTabWidth()
self.Text.SetTabWidth(self.fileCustom.getDefaultTabWidth())
lexerId = self.fileCustom.getLexerId()
self.Text.SetLexer(lexerId)
self.Text.SetWrapMode(wxSTC_WRAP_WORD)
I don't claim credit for the Custom class but you should see it is useful if you ever want your editor to display other code. The wxPython and wxWindows docs should take you further. http://wiki.wxpython.org/index.cgi/wxStyledTextCtrl If you need further info I suggest you look at the source code for the editors supplied with wxPython - it helped me. grim 
__________________
*** Experimental Python Markup CGI V2 *** Last edited by Grim Archon : October 28th, 2004 at 06:21 PM.
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#4
October 29th, 2004, 09:12 AM
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If what you say is true, most of my problems are gone, I wouldn't even need that o'riellly book on regular expressions that a bought last week. I did try the example but it require globel veriables that I did not have.
I have been trying to find some useful documention on wxStyledTextCtrl. And it is virtually non excistent or comprised of a little more then a half baked Java doc style file with a long list of methods and function with one line comments.
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#5
October 29th, 2004, 10:38 AM
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I didn't supply the full code, as I said it was just fragments. It didn't take 5 mins to write and is to some extent is work in progress
 I used the documentation that is supplied with boa constructor: http://sourceforge.net/project/showfiles.php?group_id=1909&package_id=1856&release_id=261502 The wxPython doc is where the stc component is described. grim
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#6
October 30th, 2004, 03:05 AM
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I just upgraded my Boa installation and found that using the control is much easier these days. So here is a quick sample based on the documentation supplied with Boa and self contained (you only need wxPython to run it).
Code:
#Boa:Frame:wxFrame1
from wxPython.wx import *
from wxPython.lib.anchors import LayoutAnchors
from wxPython.stc import *
htmlKeywords = '''a abbr acronym address applet area b base basefont bdo big blockquote
body br button caption center cite code col colgroup dd del dfn dir
div dl dt em fieldset font form frame frameset h1 h2 h3 h4 h5 h6
head hr html i iframe img input ins isindex kbd label legend li link
map menu meta noframes noscript object ol optgroup option p param
pre q s samp script select small span strike strong style sub sup
table tbody td textarea tfoot th thead title tr tt u ul var xml
xmlns abbr accept-charset accept accesskey action align alink alt
archive axis background bgcolor border cellpadding cellspacing char
charoff charset checked cite class classid clear codebase codetype
color cols colspan compact content coords data datafld dataformatas
datapagesize datasrc datetime declare defer dir disabled enctype
event face for frame frameborder headers height href hreflang hspace
http-equiv id ismap label lang language leftmargin link longdesc
marginwidth marginheight maxlength media method multiple name nohref
noresize noshade nowrap object onblur onchange onclick ondblclick
onfocus onkeydown onkeypress onkeyup onload onmousedown onmousemove
onmouseover onmouseout onmouseup onreset onselect onsubmit onunload
profile prompt readonly rel rev rows rowspan rules scheme scope
selected shape size span src standby start style summary tabindex
target text title topmargin type usemap valign value valuetype
version vlink vspace width text password checkbox radio submit reset
file hidden image public !doctype'''
def create(parent):
return wxFrame1(parent)
[wxID_WXFRAME1, wxID_WXFRAME1STYLEDTEXTCTRL1,
] = map(lambda _init_ctrls: wxNewId(), range(2))
class wxFrame1(wxFrame):
def _init_ctrls(self, prnt):
# generated method, don't edit
wxFrame.__init__(self, id=wxID_WXFRAME1, name='', parent=prnt,
pos=wxPoint(496, 283), size=wxSize(610, 522),
style=wxDEFAULT_FRAME_STYLE, title='wxFrame1')
self.SetClientSize(wxSize(602, 488))
self.styledTextCtrl1 = wxStyledTextCtrl(id=wxID_WXFRAME1STYLEDTEXTCTRL1,
name='styledTextCtrl1', parent=self, pos=wxPoint(0, 0),
size=wxSize(602, 488), style=0)
self.styledTextCtrl1.SetLexer(wxSTC_LEX_HTML)
self.styledTextCtrl1.Show(True)
self.styledTextCtrl1.SetConstraints(LayoutAnchors(self.styledTextCtrl1,
True, True, False, False))
self.styledTextCtrl1.SetViewEOL(True)
def __init__(self, parent):
self._init_ctrls(parent)
self.styledTextCtrl1.StyleSetSpec(wxSTC_H_TAG, "size:%d,bold,face:%s,fore:#0000FF" % (26, 'Arial'))
self.styledTextCtrl1.StyleSetSpec(wxSTC_H_ATTRIBUTE, "size:%d,bold,face:%s,fore:#DD00FF" % (16, 'Arial'))
self.styledTextCtrl1.StyleSetSpec(wxSTC_H_ATTRIBUTEUNKNOWN, "size:%d,bold,face:%s,fore:#FFEE00" % (26, 'Arial'))
self.styledTextCtrl1.SetKeyWords(0,htmlKeywords)
self.styledTextCtrl1.SetText('''<h1 color="red" bad_attrib="ahha">hello cruel world</h1>''')
class BoaApp(wxApp):
def OnInit(self):
wxInitAllImageHandlers()
self.main = create(None)
self.main.Show()
self.SetTopWindow(self.main)
return True
def main():
application = BoaApp(0)
application.MainLoop()
if __name__ == '__main__':
main()
grim
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