1: #! /usr/bin/env python
2: # coding: utf-8
3: ## ----------------------------------------
4: ##
5: ## (C) Copyright 2000-2010, 小粒ちゃん《監修》小泉ひよ子とタマゴ倶楽部
6: ##
7: ## ----------------------------------------
8: #...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
9: """
10: >>> tips()
11:
12: >>> ## ----------------------------------------
13: >>> None
14: version: #1.0.23
15: """
16: ## ---------------------------------------- demo: jython
17: """
18: _jython=/Users/sketch/book/java_useBetter_1/_jython
19:
20: cd /Users/sketch/book/java_useBetter_1/swing/JComboBox/comboBoxDemo/jython/
21: JYTHONPATH=$_jython jython -i ComboBoxDemo.py
22: ============================================================
23: Version: 2.5.0 (Release_2_5_0:6476, Jun 16 2009, 13:33:26)
24: Module : ComboBoxDemo.py
25: Date : Thu Oct 7 15:21:09 2010
26: ============================================================
27: """
28: ## ----------------------------------------
29: ##package components;
30:
31: from java.awt import BorderLayout
32: from java.awt import Font
33: from java.awt.event import ActionListener
34: from java.lang import System
35: from javax.swing import BorderFactory
36: from javax.swing import ImageIcon
37: from javax.swing import JComboBox
38: from javax.swing import JFrame
39: from javax.swing import JLabel
40: from javax.swing import JPanel
41:
42: from os.path import exists
43:
44: ## ----------------------------------------
45: class ComboBoxDemo(JPanel, ActionListener):
46:
47: def __init__(self, master):
48: super(self.__class__,self).__init__(BorderLayout())
49: self.opaque = True
50:
51: petStrings = "Bird","Cat","Dog","Rabbit","Pig",
52:
53: ## ---------------------------------------- Command::Invoker
54: class CommandComboBox(JComboBox):
55: def __init__(self, listdata, command, **keys):
56: super(self.__class__,self).__init__(listdata, **keys)
57: self.command = command
58: self.addActionListener(self)
59:
60: def actionPerformed(self, e):
61: self.command(e)
62:
63: ## ---------------------------------------- Command::Command
64: #** Listens to the combo box. */
65: class Command:
66: def __init__(self, client):
67: self.client = client
68:
69: def __call__(self, e):
70: cb = e.source
71: petName = cb.selectedItem
72: self.client.updateLabel(petName)
73:
74: #/Create the combo box, select the item at index 4.
75: #/Indices start at 0, so 4 specifies the pig.
76: self.petList = CommandComboBox(
77: listdata = petStrings,
78: selectedIndex = 4,
79: command = Command(self),
80: )
81: print "self.petList.list:: %s"%self.petList.list
82:
83: #/Set up the picture.
84: self.picture = JLabel(
85: horizontalAlignment = JLabel.CENTER,
86: border = BorderFactory.createEmptyBorder(10,0,0,0),
87: )
88: self.picture.font = self.picture.font.deriveFont(Font.ITALIC)
89: self.updateLabel(petStrings[self.petList.selectedIndex])
90:
91: #/The preferred size is hard-coded to be the width of the
92: #/widest image and the height of the tallest image + the border.
93: #/A real program would compute this.
94: self.picture.preferredSize = 177,122+10
95:
96: #/Lay out the demo.
97: self.add(self.petList, BorderLayout.PAGE_START)
98: self.add(self.picture, BorderLayout.PAGE_END)
99: self.border = BorderFactory.createEmptyBorder(20,20,20,20)
100:
101: #/Display the window.
102: master.contentPane = self
103: master.pack()
104:
105: def updateLabel(self, name):
106: icon = self.createImageIcon("_images/%s.gif"%name)
107: self.picture.icon = icon
108: self.picture.toolTipText = "A drawing of a " + name.lower()
109: self.picture.text = "Image not found" if icon == None else None
110:
111: #** Returns an ImageIcon, or null if the path was invalid. */
112: @staticmethod
113: def createImageIcon(path):
114: imgURL = path if exists(path) else None
115: if imgURL != None:
116: return ImageIcon(imgURL)
117: else:
118: System.err.println("Couldn't find file: " + path)
119: return None
120:
121: """
122: * Create the GUI and show it. For thread safety,
123: * this method should be invoked from the
124: * event dispatch thread.
125: """
126: @staticmethod
127: def createAndShowGUI():
128: System.out.println("Couldn't find file: @")
129:
130: #/Create and set up the window.
131: frame = JFrame(
132: title = "ComboBoxDemo",
133: locationRelativeTo = None,
134: defaultCloseOperation = JFrame.EXIT_ON_CLOSE,
135: )
136:
137: #/Create and set up the content pane.
138: ComboBoxDemo(frame)
139:
140: ##Display the window.
141: frame.visible = True
142:
143: ## ----------------------------------------
144: from __init__ import *
145: tips = ComboBoxDemo.createAndShowGUI
146:
147: if __name__=='__main__':
148: inform()
149: testmod()
150:
151: ## ========================================
