Application: gvSIG desktop » gvSIG scripting

from java.lang import Character

from javax.swing import JWindow, JList, JScrollPane

from java.awt import Color, Dimension

from java.awt.event import KeyAdapter

from java.awt.event import KeyEvent

import string

__author__ = "Don Coleman <dcoleman@chariotsolutions.com>"

__cvsid__ = "$Id: popup.py 5782 2006-06-12 07:56:49Z jmvivo $"

class Popup(JWindow):

    """Popup window to display list of methods for completion"""

    MAX_HEIGHT = 300

    MIN_WIDTH = 200

    MAX_WIDTH = 400

    def __init__(self, frame, textComponent):

        JWindow.__init__(self, frame)

        self.textComponent = textComponent

        self.size = (200,200)

        self.list = JList(keyPressed=self.key)

        self.list.setBackground(Color(255,255,225)) # TODO move this color

        self.getContentPane().add(JScrollPane(self.list))

        self.list.setSelectedIndex(0)

        self.originalData = ""

        self.data = ""

        self.typed = ""

    def key(self, e):

        # key listener

        #print "Other Listener"

        code = e.getKeyCode()

        #print 'keychar:',e.getKeyChar()

        if code == KeyEvent.VK_ESCAPE:

            self.hide()

        elif code == KeyEvent.VK_ENTER or code == KeyEvent.VK_TAB:

            self.chooseSelected()

            e.consume()

        elif code == 8: # BACKSPACE

            self.typed = self.typed[:-1]

            self.data = filter(self.originalData, self.typed)

            self.list.setListData(self.data)

            self.list.setSelectedIndex(0)

        elif code == KeyEvent.VK_UP:

            self.previous()

            # consume event to avoid history previous

            e.consume()

        elif code == KeyEvent.VK_DOWN:

            self.next()

            # consume event to avoid history next

            e.consume()

        else:

            char = e.getKeyChar()

            if Character.isJavaLetterOrDigit(char):

                self.typed += char 

                self.data = filter(self.data, self.typed)

                self.list.setListData(self.data)

                self.list.setSelectedIndex(0)

    def next(self):

        index = self.list.getSelectedIndex()

        max = (self.list.getModel().getSize() - 1)

        if index < max:

            index += 1

            self.list.setSelectedIndex(index)

            self.list.ensureIndexIsVisible(index)

    def previous(self):

        index = self.list.getSelectedIndex()

        if index > 0:

            index -= 1

            self.list.setSelectedIndex(index)

            self.list.ensureIndexIsVisible(index)

    def chooseSelected(self):

        """Choose the selected value in the list"""

        value = self.list.getSelectedValue()

        startPosition = self.dotPosition + 1

        caretPosition = self.textComponent.getCaretPosition()

        self.textComponent.select(startPosition, caretPosition) 

        self.textComponent.replaceSelection(value)

        self.textComponent.setCaretPosition(startPosition + len(value))

        self.hide()

    def setMethods(self, methodList):

        methodList.sort()

        self.data = methodList

        self.originalData = methodList

        self.typed = ""

        self.list.setListData(methodList)

    def show(self):

        # when the popup becomes visible, get the cursor

        # so we know how to replace the selection

        self.dotPosition = self.textComponent.getCaretPosition()

        self.setSize(self.getPreferredSize())

        JWindow.show(self)

    def getPreferredSize(self):

        # need to add a magic amount to the size to avoid scrollbars

        # I'm sure there's a better way to do this

        MAGIC = 20

        size = self.list.getPreferredScrollableViewportSize()

        height = size.height + MAGIC

        width = size.width + MAGIC

        if height > Popup.MAX_HEIGHT:

            height = Popup.MAX_HEIGHT

        if width > Popup.MAX_WIDTH:

            width = Popup.MAX_WIDTH

        if width < Popup.MIN_WIDTH:

            widht = Popup.MIN_WIDTH

        return Dimension(width, height)

# this needs a list renderer that will hilight the prefix

def filter(list, prefix):

    prefix = prefix.lower()

    list = [eachItem for eachItem in list if str(eachItem).lower().startswith(prefix)]

    return list