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#------------------------------------------------------------------------------
# Copyright (c) 2005, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in enthought/LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
# Thanks for using Enthought open source!
#
# Author: Enthought, Inc.
# Description: <Enthought pyface package component>
#------------------------------------------------------------------------------
""" A simple progress bar intended to run in the UI thread """
import wx
# Enthought library imports
from enthought.traits.api import Instance, Enum, Str, Int, Bool
# Local imports
from widget import Widget
from window import Window
from dialog import Dialog
class ProgressBar(Widget):
""" A simple progress bar dialog intended to run in the UI thread """
parent = Instance(wx.Frame)
direction = Enum('horizontal', 'horizontal', 'vertical')
def __init__(self, parent, minimum=0, maximum=100, direction='horizontal',
size=(150, -1)):
"""
Constructs a progress bar which can be put into a panel, or optionaly,
its own window
"""
self._max = max
self.parent = parent
style = wx.GA_HORIZONTAL
if direction == "vertical":
style = wx.GA_VERTICAL
print wx.DefaultSize
print wx.DefaultPosition
self.control = wx.Gauge(parent, -1, maximum, style=style, size=size)
def update(self, value):
"""
Updates the progress bar to the desired value.
"""
self.control.SetValue(value)
self.control.Update()
def _create_parent(self):
parent = wx.Frame(None, -1, "progress")
parent.SetExtraStyle(parent.GetExtraStyle() | wx.WS_EX_TRANSIENT)
return parent
def _show(self):
# Show the parent
self.parent.Show()
# Show the toolkit-specific control in the parent
self.control.Show()
class ProgressDialog(Window):
""" A simple progress dialog window which allows itself to be updated """
progress_bar = Instance(ProgressBar)
title = Str
message = Str
min = Int
max = Int
margin = Int(5)
can_cancel = Bool(False)
dialog_size = Instance(wx.Size)
# Label for the 'cancel' button
cancel_button_label = Str('Cancel')
def open(self):
super(ProgressDialog, self).open()
wx.Yield()
def update(self, value):
"""
updates the progress bar to the desired value. If the value is >=
the maximum and the progress bar is not contained in another panel
the parent window will be closed
"""
if self.progress_bar is not None:
self.progress_bar.update(value)
if value >= self.max:
self.close()
def _create_buttons(self, dialog, parent_sizer):
""" Creates the buttons. """
sizer = wx.BoxSizer(wx.HORIZONTAL)
self._cancel = None
if self.can_cancel == True:
# 'Cancel' button.
self._cancel = cancel = wx.Button(dialog, wx.ID_CANCEL,
self.cancel_button_label)
wx.EVT_BUTTON(dialog, wx.ID_CANCEL, self._on_cancel)
sizer.Add(cancel, 0, wx.LEFT, 10)
button_size = cancel.GetSize()
self.dialog_size.x = max(self.dialog_size.x, button_size.x + 2*self.margin)
self.dialog_size.y += button_size.y + 2*self.margin
parent_sizer.Add(sizer, 0, wx.ALIGN_RIGHT | wx.ALL, 5)
return
def _create_gauge(self, dialog, parent_sizer):
self.progress_bar = ProgressBar(dialog, self.min, self.max)
parent_sizer.Add(self.progress_bar.control, 0, wx.CENTER | wx.ALL, 5)
progress_bar_size = self.progress_bar.control.GetSize()
self.dialog_size.x = max(self.dialog_size.x, progress_bar_size.x + 2*self.margin)
self.dialog_size.y += progress_bar_size.y + 2*self.margin
return
def _create_label(self, dialog, parent_sizer):
msg_control = wx.StaticText(dialog, -1, self.message)
parent_sizer.Add(msg_control, 0, wx.LEFT | wx.TOP, 5)
msg_control_size = msg_control.GetSize()
self.dialog_size.x = max(self.dialog_size.x, msg_control_size.x + 2*self.margin)
self.dialog_size.y += msg_control_size.y + 2*self.margin
return
def _create_contents(self, parent):
""" Creates the window contents.
This method is intended to be overridden if necessary. By default we
just create an empty panel.
"""
dialog = parent
sizer = wx.BoxSizer(wx.VERTICAL)
dialog.SetSizer(sizer)
dialog.SetAutoLayout(True)
dialog.SetBackgroundColour(wx.NullColor)
self.dialog_size = wx.Size()
# The 'guts' of the dialog.
self._create_label(dialog, sizer)
self._create_gauge(dialog, sizer)
self._create_buttons(dialog, sizer)
dialog.SetClientSize(self.dialog_size)
# if self.size != (-1,-1):
# dialog.SetSize(self.size)
#
# else:
# sizer.Fit(dialog)
dialog.CentreOnParent()
return dialog
if __name__ == "__main__":
#
# simple example of its use
#
import time
from enthought.pyface.api import GUI, ApplicationWindow
from enthought.pyface.action.api import Action, MenuManager, MenuBarManager
def task_func(t):
progress = ProgressDialog(title="progress", message="counting to %d"%t, max=t)
progress.open()
for i in range(0,t+1):
time.sleep(1)
print i
progress.update(i)
progress.update(4)
def _main():
task_func(4)
class MainWindow(ApplicationWindow):
""" The main application window. """
######################################################################
# 'object' interface.
######################################################################
def __init__(self, **traits):
""" Creates a new application window. """
# Base class constructor.
super(MainWindow, self).__init__(**traits)
# Add a menu bar.
self.menu_bar_manager = MenuBarManager(
MenuManager(
Action(name='E&xit', on_perform=self.close),
Action(name='DoIt', on_perform=_main),
name = '&File',
)
)
return
gui = GUI(redirect=False)
# Create and open the main window.
window = MainWindow()
window.open()
wx.CallAfter(_main)
# Start the GUI event loop!
gui.event_loop()
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