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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.
#
#------------------------------------------------------------------------------
""" Enthought pyface package component
"""
# Major package imports.
import wx
# Enthought library imports.
from traits.api import Instance, Int, provides, Unicode
# Local imports.
from pyface.i_heading_text import IHeadingText, MHeadingText
from pyface.image_resource import ImageResource
from pyface.wx.util.font_helper import new_font_like
from .widget import Widget
@provides(IHeadingText)
class HeadingText(MHeadingText, Widget):
""" The toolkit specific implementation of a HeadingText. See the
IHeadingText interface for the API documentation.
"""
#### 'IHeadingText' interface #############################################
level = Int(1)
text = Unicode('Default')
image = Instance(ImageResource, ImageResource('heading_level_1'))
###########################################################################
# 'object' interface.
###########################################################################
def __init__(self, parent, **traits):
""" Creates the panel. """
# Base class constructor.
super(HeadingText, self).__init__(**traits)
# Create the toolkit-specific control that represents the widget.
self.control = self._create_control(parent)
return
###########################################################################
# Private interface.
###########################################################################
def _create_control(self, parent):
""" Create the toolkit-specific control that represents the widget. """
# The background image (it is tiled).
image = self.image.create_image()
self._bmp = image.ConvertToBitmap()
sizer = wx.BoxSizer(wx.VERTICAL)
panel = wx.Panel(parent, -1, style=wx.CLIP_CHILDREN | wx.SIMPLE_BORDER)
panel.SetSizer(sizer)
panel.SetAutoLayout(True)
# Create a suitable font.
self._font = new_font_like(wx.NORMAL_FONT, family=wx.SWISS)
width, height = self._get_preferred_size(self.text, self._font)
panel.SetMinSize((width, height))
wx.EVT_PAINT(panel, self._on_paint_background)
wx.EVT_ERASE_BACKGROUND(panel, self._on_erase_background)
return panel
def _get_preferred_size(self, text, font):
""" Calculates the preferred size of the widget. """
dc = wx.ScreenDC()
dc.SetFont(font)
width, height = dc.GetTextExtent(text)
return (width + 10, height + 10)
def _tile_background_image(self, dc, width, height):
""" Tiles the background image. """
w = self._bmp.GetWidth()
h = self._bmp.GetHeight()
x = 0
while x < width:
y = 0
while y < height:
dc.DrawBitmap(self._bmp, x, y)
y = y + h
x = x + w
return
#### Trait event handlers #################################################
def _text_changed(self, new):
""" Called when the text is changed. """
if self.control is not None:
self.control.Refresh()
return
#### wx event handlers ####################################################
def _on_paint_background(self, event):
""" Called when the background of the panel is painted. """
dc = wx.PaintDC(self.control)
size = self.control.GetClientSize()
# Tile the background image.
self._tile_background_image(dc, size.width, size.height)
# Render the text.
dc.SetFont(self._font)
dc.DrawText(self.text, 5, 4)
return
def _on_erase_background(self, event):
""" Called when the background of the panel is erased. """
dc = event.GetDC()
size = self.control.GetClientSize()
# Tile the background image.
self._tile_background_image(dc, size.width, size.height)
# Render the text.
dc.SetFont(self._font)
dc.DrawText(self.text, 5, 4)
return
#### EOF ######################################################################
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