draw arrow of certain length on certain position

[Stefanie Lück]

Hi!

Thanks for the answers but I have still some question / problems.

1) I need the text to be able copy out from the window (thats why actually
I don't wanted to draw it). Is this possible with the wxDC?

2) I need to cut everything after certain length. Now I draw everything in one line but
this is not very nice for the user, since my drawing is very long. So e.g. 100 chars. text, the corresponding arrows in the next line again 100 char text and so on. Is there any way to cut the "ready full length line" after it's?

3) I want to put a specific label to the arrows over dc.DrawLabel, but it dosen't work somehow.
There is allways one and the same text written.

Here a quick example (arrow is shown as a rectangle):

import wx

class SketchWindow(wx.Window):
def __init__(self, parent, ID):
wx.Window.__init__(self, parent, ID)

self.SetBackgroundColour("White")
self.color = "Black"
self.thickness = 1
self.pen = wx.Pen(self.color, self.thickness, wx.SOLID)
self.lines = []
self.curLine = []
self.pos = (0, 0)
self.InitBuffer()

self.Bind(wx.EVT_SIZE, self.OnSize)
self.Bind(wx.EVT_IDLE, self.OnIdle)
self.Bind(wx.EVT_PAINT, self.OnPaint)

def InitBuffer(self):
size = self.GetClientSize()
self.buffer = wx.EmptyBitmap(size.width, size.height)
if self.buffer.Ok():
dc = wx.BufferedDC(None, self.buffer)
dc.SetBackground(wx.Brush(self.GetBackgroundColour()))
dc.Clear()
dc.SetFont(wx.Font(12, wx.DEFAULT, wx.NORMAL, wx.NORMAL, 0, "Courier New"))
seq = '''tgaattgtaatacgactcactatagggcgaattgggaatgcgctcgcggtctggaggatcgctctccgctaggctcggtaccggttccctttagtgagggttaatttcga'''
dc.DrawText(seq, 10, 10)
text = '-'
tw, th, space, z = dc.GetFullTextExtent(text)
liste = {'GAATTGTAATACGACTCACTATAGGGCGAA':'T7', 'CCCTTTAGTGAGGGTTAATT':'T3'}
seq = seq.upper()

#for i in liste:
for i in liste.iterkeys():
for x in liste.itervalues():

pos = seq.find(i)
length = (len(i) * tw) - space
pos_rec = (pos * tw) + tw
dc.SetBrush(wx.RED_BRUSH)
rect = wx.Rect(pos_rec, 50, length, 20)
dc.DrawRectangle(pos_rec, 50, length, 20)
dc.DrawLabel(x,
rect, wx.ALIGN_CENTER | wx.ALIGN_TOP)

self.reInitBuffer = False

def OnSize(self, event):
self.reInitBuffer = True

def OnIdle(self, event):
if self.reInitBuffer:
self.InitBuffer()
self.Refresh(False)

def OnPaint(self, event):
dc = wx.BufferedPaintDC(self, self.buffer)

class SketchFrame(wx.Frame):
def __init__(self, parent):
wx.Frame.__init__(self, parent, -1, "Sketch Frame",
size=(800,600))


self.sketch = SketchWindow(self, -1)

if __name__ == '__main__':
app = wx.PySimpleApp()
frame = SketchFrame(None)
frame.Show(True)
app.MainLoop()


Thanks again in advance!
Stefanie

[Robin Dunn]

Post by Stefanie Lück
Hi!
Thanks for the answers but I have still some question / problems.
1) I need the text to be able copy out from the window (thats why actually
I don't wanted to draw it). Is this possible with the wxDC?

Yes, if you handle the mouse events and drawing of selected text and
clipboard actions, and etc.

Post by Stefanie Lück
2) I need to cut everything after certain length. Now I draw everything in one line but
this is not very nice for the user, since my drawing is very long. So
e.g. 100 chars. text, the corresponding arrows in the next line again
100 char text and so on. Is there any way to cut the "ready full length
line" after it's?

Sorry, I can't parse that text, but if my guess is correct you just need
to split your text into fragments and then draw each fragment at
different positions on the dc.

Post by Stefanie Lück
3) I want to put a specific label to the arrows over dc.DrawLabel, but
it dosen't work somehow.
There is allways one and the same text written.

Put something like "print x, rect" inside your loop and you'll see why.