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Text File  |  2000-08-10  |  3KB  |  127 lines
  1. # Text editing widget
  2.  
  3. # NB: this always assumes fixed bounds.
  4. # For auto-growing TextEdit windows, different code would be needed.
  5.  
  6. from stdwinevents import *
  7.  
  8. class TextEdit:
  9.     #
  10.     def create(self, parent, (cols, rows)):
  11.         parent.addchild(self)
  12.         self.parent = parent
  13.         self.cols = cols
  14.         self.rows = rows
  15.         self.text = ''
  16.         # Creation of the editor is done in realize()
  17.         self.editor = None
  18.         self.dh = self.dv = 0
  19.         return self
  20.     #
  21.     def createboxed(self, parent, (cols, rows), (dh, dv)):
  22.         self = self.create(parent, (cols, rows))
  23.         self.dh = max(0, dh)
  24.         self.dv = max(0, dv)
  25.         return self
  26.     #
  27.     def settext(self, text):
  28.         self.editor.settext(text)
  29.     #
  30.     def gettext(self):
  31.         return self.editor.gettext(text)
  32.     #
  33.     # Downcalls from parent to child
  34.     #
  35.     def destroy(self):
  36.         del self.parent
  37.         del self.editor
  38.         del self.window
  39.     #
  40.     def getminsize(self, m, (width, height)):
  41.         width = max(0, width - 2*self.dh)
  42.         height = max(0, height - 2*self.dv)
  43.         if width > 0 and self.editor:
  44.             (left, top), (right, bottom) = self.editor.getrect()
  45.             act_width, act_height = right - left, bottom - top
  46.             if width >= act_width:
  47.                 width = width + 2*self.dh
  48.                 height = max(height, act_height) + 2*self.dv
  49.                 return width, height
  50.         width = max(width, self.cols*m.textwidth('in')/2) + 2*self.dh
  51.         height = max(height, self.rows*m.lineheight()) + 2*self.dv
  52.         return width, height
  53.     #
  54.     def setbounds(self, bounds):
  55.         self.bounds = bounds
  56.         if self.editor:
  57.             (left, top), (right, bottom) = bounds
  58.             left = left + self.dh
  59.             top = top + self.dv
  60.             right = right - self.dh
  61.             bottom = bottom - self.dv
  62.             self.editor.move((left, top), (right, bottom))
  63.             if self.dh and self.dv:
  64.                 (left, top), (right, bottom) = bounds
  65.                 left = left + 1
  66.                 top = top + 1
  67.                 right = right - 1
  68.                 bottom = bottom - 1
  69.                 bounds = (left, top), (right, bottom)
  70.             self.editor.setview(bounds)
  71.     #
  72.     def getbounds(self):
  73.         return self.bounds
  74.     #
  75.     def realize(self):
  76.         self.window = self.parent.getwindow()
  77.         (left, top), (right, bottom) = self.bounds
  78.         left = left + self.dh
  79.         top = top + self.dv
  80.         right = right - self.dh
  81.         bottom = bottom - self.dv
  82.         self.editor = \
  83.             self.window.textcreate((left, top), (right, bottom))
  84.         self.editor.setactive(0)
  85.         bounds = self.bounds
  86.         if self.dh and self.dv:
  87.             (left, top), (right, bottom) = bounds
  88.             left = left + 1
  89.             top = top + 1
  90.             right = right - 1
  91.             bottom = bottom - 1
  92.             bounds = (left, top), (right, bottom)
  93.         self.editor.setview(bounds)
  94.         self.editor.settext(self.text)
  95.         self.parent.need_mouse(self)
  96.         self.parent.need_keybd(self)
  97.         self.parent.need_altdraw(self)
  98.     #
  99.     def draw(self, d, area):
  100.         if self.dh and self.dv:
  101.             d.box(self.bounds)
  102.     #
  103.     def altdraw(self, area):
  104.         self.editor.draw(area)
  105.     #
  106.     # Event downcalls
  107.     #
  108.     def mouse_down(self, detail):
  109.         x = self.editor.event(WE_MOUSE_DOWN, self.window, detail)
  110.     #
  111.     def mouse_move(self, detail):
  112.         x = self.editor.event(WE_MOUSE_MOVE, self.window, detail)
  113.     #
  114.     def mouse_up(self, detail):
  115.         x = self.editor.event(WE_MOUSE_UP, self.window, detail)
  116.     #
  117.     def keybd(self, type, detail):
  118.         x = self.editor.event(type, self.window, detail)
  119.     #
  120.     def activate(self):
  121.         self.editor.setfocus(0, 30000)
  122.         self.editor.setactive(1)
  123.     #
  124.     def deactivate(self):
  125.         self.editor.setactive(0)
  126.     #
  127.