Add TextBox, text editor demo. Update demobase.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/demos/04_texteditor.py Fri Mar 28 14:58:20 2014 +0100
@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+
+import demobase
+
+from tuikit.core.application import Application
+#from tuikit.scrollview import ScrollView
+from tuikit.widgets.textbox import TextBox
+
+
+class MyApplication(Application):
+ def __init__(self):
+ Application.__init__(self)
+ #self.top.add_handler('keypress', self.on_top_keypress)
+
+ t = open('../tuikit/core/widget.py').read()
+ editbox = TextBox(t)
+
+ #scroll = ScrollView()
+ #scroll.add(editbox)
+
+ self.root_window.add(editbox)
+ #self.root_window.add(scroll, halign='fill', valign='fill')
+
+ def on_top_keypress(self, ev):
+ if ev.keyname == 'escape':
+ self.terminate()
+ return True
+
+
+if __name__ == '__main__':
+ app = MyApplication()
+ app.start()
+
--- a/demos/demobase.py Fri Mar 28 14:58:12 2014 +0100
+++ b/demos/demobase.py Fri Mar 28 14:58:20 2014 +0100
@@ -1,9 +1,13 @@
+# Path to root directory containing tuikit package
import sys
sys.path.append('..')
-import logging
+# Set system locale (needed for ncurses)
+import locale
+locale.setlocale(locale.LC_ALL, '')
# Setup logging
+import logging
logger = logging.getLogger('tuikit')
logger.setLevel(logging.DEBUG)
handler = logging.FileHandler(filename='tuikit.log')
@@ -11,3 +15,9 @@
formatter = logging.Formatter('%(asctime)s %(name)s %(levelname)s %(message)s')
handler.setFormatter(formatter)
logger.addHandler(handler)
+
+# Escape key code is also used for escape sequences. After escape code,
+# terminal waits for rest of sequence. This delay is 1 second by default.
+# Let's hope that our terminal is fast enough to handle the sequences in 200ms.
+import os
+os.environ['ESCDELAY'] = '200'
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tuikit/widgets/textbox.py Fri Mar 28 14:58:20 2014 +0100
@@ -0,0 +1,209 @@
+from tuikit.core.widget import Widget
+from tuikit.core.signal import Signal
+
+
+class TextBox(Widget):
+
+ """Multiline text view/edit widget.
+
+ Spot is used for text cursor position.
+
+ """
+
+ def __init__(self, text=''):
+ Widget.__init__(self)
+
+ # Text content, splitted as lines
+ self._lines = []
+ self.text = text
+
+ self.allow_focus = True
+
+ # Cursor position is same as spot.
+ # This variable rememberes horizontal position
+ # for the case when cursor moves to shorter line.
+ self.cursor_column = 0
+ # selection - line and column of selection start
+ self.sel_line = 0
+ self.sel_column = 0
+
+ #self.add_events('scroll', Event)
+
+ @property
+ def text(self):
+ return '\n'.join(self._lines)
+
+ @text.setter
+ def text(self, value):
+ self._lines = value.split('\n')
+ maxlen = max([len(line) for line in self._lines])
+ self.sizereq.update(w=maxlen, h=len(self._lines))
+
+ @property
+ def cur_line(self):
+ return self._lines[self._spot.y]
+
+ @cur_line.setter
+ def cur_line(self, value):
+ self._lines[self._spot.y] = value
+
+ def set_theme(self, theme):
+ Widget.set_theme(self, theme)
+ self.color = theme.normal
+
+ def draw(self, buffer):
+ exposed = self.exposed(buffer)
+ with buffer.attr(self.color):
+ buffer.fill()
+ end_y = min(len(self._lines), exposed.y + exposed.h)
+ for j in range(exposed.y, end_y):
+ line = self._lines[j]
+ buffer.puts(line, 0, j)
+ #self.cursor = (self._spot.x, self._spot.y)
+
+ def on_keypress(self, ev):
+ if ev.keyname:
+ if ev.keyname == 'left': self.move_left()
+ if ev.keyname == 'right': self.move_right()
+ if ev.keyname == 'home': self.move_home()
+ if ev.keyname == 'end': self.move_end()
+ if ev.keyname == 'up': self.move_up()
+ if ev.keyname == 'down': self.move_down()
+ if ev.keyname == 'pageup': self.move_pageup()
+ if ev.keyname == 'pagedown': self.move_pagedown()
+ if ev.keyname == 'backspace': self.backspace()
+ if ev.keyname == 'delete': self.del_char()
+ if ev.keyname == 'enter': self.add_newline(move=True)
+ if ev.mod == ev.MOD_CTRL:
+ if ev.keyname == 'home': self.move_top()
+ if ev.keyname == 'end': self.move_bottom()
+
+ if ev.char:
+ self.add_char(ev.char)
+ self.move_right()
+
+ self.redraw()
+
+ def on_mousedown(self, ev):
+ y = ev.wy
+ x = min(ev.wx, len(self._lines[y]))
+ self._spot.update(x=x, y=y)
+ self.redraw()
+
+ def on_mousewheel(self, ev):
+ if ev.button == 4:
+ # wheel up
+ self.emit('scrollreq', -5)
+ if ev.button == 5:
+ # wheel down
+ self.emit('scrollreq', +5)
+ self.redraw()
+
+ def move_left(self):
+ if self._spot.x > 0:
+ self._spot.x -= 1
+ else:
+ if self._spot.y > 0:
+ self._spot.y -= 1
+ self._spot.x = len(self.cur_line)
+ self.cursor_column = self._spot.x
+
+ def move_right(self):
+ if self._spot.x < len(self.cur_line):
+ self._spot.x += 1
+ else:
+ if self._spot.y < len(self._lines) - 1:
+ self._spot.y += 1
+ self._spot.x = 0
+ self.cursor_column = self._spot.x
+
+ def move_home(self):
+ self._spot.x = 0
+ self.cursor_column = self._spot.x
+
+ def move_end(self):
+ self._spot.x = len(self.cur_line)
+ self.cursor_column = self._spot.x
+
+ def move_up(self):
+ if self._spot.y > 0:
+ self._spot.y -= 1
+ self._update_spot_x()
+
+ def move_down(self):
+ if self._spot.y < len(self._lines) - 1:
+ self._spot.y += 1
+ self._update_spot_x()
+
+ def move_pageup(self):
+ if self._spot.y >= self.view_height - 1:
+ self.emit('scrollreq', - (self.view_height - 1))
+ self._spot.y -= self.view_height - 1
+ else:
+ self._spot.y = 0
+ self._update_spot_x()
+
+ def move_pagedown(self):
+ if len(self._lines) - self._spot.y > (self.view_height - 1):
+ self.emit('scrollreq', (self.view_height - 1))
+ self._spot.y += self.view_height - 1
+ else:
+ self._spot.y = len(self._lines) - 1
+ self._update_spot_x()
+
+ def move_top(self):
+ self._spot.y = 0
+ self._update_spot_x()
+
+ def move_bottom(self):
+ self._spot.y = len(self._lines) - 1
+ self._update_spot_x()
+
+ def add_char(self, c):
+ ln = self.cur_line
+ sx = self._spot.x
+ self.cur_line = ln[:sx] + c + ln[sx:]
+ self.cursor_column = sx
+
+ def add_newline(self, move=False):
+ ln = self.cur_line
+ sx = self._spot.x
+ self.cur_line = ln[sx:]
+ self._lines.insert(self._spot.y, ln[:sx])
+ self._default_size.update(h=len(self._lines))
+ if move:
+ self.move_right()
+
+ def add_line(self, text):
+ ln = self.cur_line
+ sx = self._spot.x
+ self.cur_line = ln[sx:]
+ self._lines.insert(self._spot.y, ln[:sx] + text)
+ self.cursor_column = 0
+ self._spot.x = 0
+ self._spot.y += 1
+ w = max(self._default_size.w, len(ln[:sx] + text))
+ self._default_size.update(w=w, h=len(self._lines))
+
+ def backspace(self):
+ if self._spot.y > 0 or self._spot.x > 0:
+ self.move_left()
+ self.del_char()
+
+ def del_char(self):
+ ln = self.cur_line
+ sx = self._spot.x
+ if sx == len(self.cur_line):
+ if self._spot.y + 1 < len(self._lines):
+ self.cur_line += self._lines[self._spot.y+1]
+ del self._lines[self._spot.y+1]
+ self._default_size.update(h=len(self._lines))
+ else:
+ self.cur_line = ln[:sx] + ln[sx+1:]
+
+ def _update_spot_x(self):
+ if self.cursor_column > len(self.cur_line):
+ self._spot.x = len(self.cur_line)
+ else:
+ self._spot.x = self.cursor_column
+