| 1 | # XXX TO DO:
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| 2 | # - popup menu
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| 3 | # - support partial or total redisplay
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| 4 | # - key bindings (instead of quick-n-dirty bindings on Canvas):
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| 5 | # - up/down arrow keys to move focus around
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| 6 | # - ditto for page up/down, home/end
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| 7 | # - left/right arrows to expand/collapse & move out/in
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| 8 | # - more doc strings
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| 9 | # - add icons for "file", "module", "class", "method"; better "python" icon
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| 10 | # - callback for selection???
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| 11 | # - multiple-item selection
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| 12 | # - tooltips
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| 13 | # - redo geometry without magic numbers
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| 14 | # - keep track of object ids to allow more careful cleaning
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| 15 | # - optimize tree redraw after expand of subnode
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| 16 |
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| 17 | import os
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| 18 | from Tkinter import *
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| 19 | import imp
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| 20 |
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| 21 | from idlelib import ZoomHeight
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| 22 | from idlelib.configHandler import idleConf
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| 23 |
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| 24 | ICONDIR = "Icons"
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| 25 |
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| 26 | # Look for Icons subdirectory in the same directory as this module
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| 27 | try:
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| 28 | _icondir = os.path.join(os.path.dirname(__file__), ICONDIR)
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| 29 | except NameError:
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| 30 | _icondir = ICONDIR
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| 31 | if os.path.isdir(_icondir):
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| 32 | ICONDIR = _icondir
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| 33 | elif not os.path.isdir(ICONDIR):
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| 34 | raise RuntimeError, "can't find icon directory (%r)" % (ICONDIR,)
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| 35 |
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| 36 | def listicons(icondir=ICONDIR):
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| 37 | """Utility to display the available icons."""
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| 38 | root = Tk()
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| 39 | import glob
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| 40 | list = glob.glob(os.path.join(icondir, "*.gif"))
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| 41 | list.sort()
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| 42 | images = []
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| 43 | row = column = 0
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| 44 | for file in list:
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| 45 | name = os.path.splitext(os.path.basename(file))[0]
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| 46 | image = PhotoImage(file=file, master=root)
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| 47 | images.append(image)
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| 48 | label = Label(root, image=image, bd=1, relief="raised")
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| 49 | label.grid(row=row, column=column)
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| 50 | label = Label(root, text=name)
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| 51 | label.grid(row=row+1, column=column)
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| 52 | column = column + 1
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| 53 | if column >= 10:
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| 54 | row = row+2
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| 55 | column = 0
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| 56 | root.images = images
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| 57 |
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| 58 |
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| 59 | class TreeNode:
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| 60 |
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| 61 | def __init__(self, canvas, parent, item):
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| 62 | self.canvas = canvas
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| 63 | self.parent = parent
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| 64 | self.item = item
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| 65 | self.state = 'collapsed'
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| 66 | self.selected = False
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| 67 | self.children = []
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| 68 | self.x = self.y = None
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| 69 | self.iconimages = {} # cache of PhotoImage instances for icons
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| 70 |
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| 71 | def destroy(self):
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| 72 | for c in self.children[:]:
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| 73 | self.children.remove(c)
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| 74 | c.destroy()
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| 75 | self.parent = None
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| 76 |
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| 77 | def geticonimage(self, name):
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| 78 | try:
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| 79 | return self.iconimages[name]
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| 80 | except KeyError:
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| 81 | pass
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| 82 | file, ext = os.path.splitext(name)
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| 83 | ext = ext or ".gif"
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| 84 | fullname = os.path.join(ICONDIR, file + ext)
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| 85 | image = PhotoImage(master=self.canvas, file=fullname)
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| 86 | self.iconimages[name] = image
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| 87 | return image
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| 88 |
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| 89 | def select(self, event=None):
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| 90 | if self.selected:
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| 91 | return
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| 92 | self.deselectall()
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| 93 | self.selected = True
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| 94 | self.canvas.delete(self.image_id)
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| 95 | self.drawicon()
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| 96 | self.drawtext()
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| 97 |
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| 98 | def deselect(self, event=None):
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| 99 | if not self.selected:
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| 100 | return
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| 101 | self.selected = False
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| 102 | self.canvas.delete(self.image_id)
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| 103 | self.drawicon()
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| 104 | self.drawtext()
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| 105 |
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| 106 | def deselectall(self):
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| 107 | if self.parent:
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| 108 | self.parent.deselectall()
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| 109 | else:
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| 110 | self.deselecttree()
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| 111 |
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| 112 | def deselecttree(self):
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| 113 | if self.selected:
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| 114 | self.deselect()
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| 115 | for child in self.children:
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| 116 | child.deselecttree()
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| 117 |
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| 118 | def flip(self, event=None):
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| 119 | if self.state == 'expanded':
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| 120 | self.collapse()
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| 121 | else:
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| 122 | self.expand()
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| 123 | self.item.OnDoubleClick()
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| 124 | return "break"
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| 125 |
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| 126 | def expand(self, event=None):
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| 127 | if not self.item._IsExpandable():
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| 128 | return
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| 129 | if self.state != 'expanded':
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| 130 | self.state = 'expanded'
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| 131 | self.update()
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| 132 | self.view()
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| 133 |
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| 134 | def collapse(self, event=None):
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| 135 | if self.state != 'collapsed':
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| 136 | self.state = 'collapsed'
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| 137 | self.update()
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| 138 |
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| 139 | def view(self):
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| 140 | top = self.y - 2
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| 141 | bottom = self.lastvisiblechild().y + 17
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| 142 | height = bottom - top
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| 143 | visible_top = self.canvas.canvasy(0)
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| 144 | visible_height = self.canvas.winfo_height()
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| 145 | visible_bottom = self.canvas.canvasy(visible_height)
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| 146 | if visible_top <= top and bottom <= visible_bottom:
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| 147 | return
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| 148 | x0, y0, x1, y1 = self.canvas._getints(self.canvas['scrollregion'])
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| 149 | if top >= visible_top and height <= visible_height:
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| 150 | fraction = top + height - visible_height
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| 151 | else:
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| 152 | fraction = top
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| 153 | fraction = float(fraction) / y1
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| 154 | self.canvas.yview_moveto(fraction)
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| 155 |
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| 156 | def lastvisiblechild(self):
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| 157 | if self.children and self.state == 'expanded':
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| 158 | return self.children[-1].lastvisiblechild()
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| 159 | else:
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| 160 | return self
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| 161 |
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| 162 | def update(self):
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| 163 | if self.parent:
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| 164 | self.parent.update()
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| 165 | else:
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| 166 | oldcursor = self.canvas['cursor']
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| 167 | self.canvas['cursor'] = "watch"
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| 168 | self.canvas.update()
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| 169 | self.canvas.delete(ALL) # XXX could be more subtle
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| 170 | self.draw(7, 2)
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| 171 | x0, y0, x1, y1 = self.canvas.bbox(ALL)
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| 172 | self.canvas.configure(scrollregion=(0, 0, x1, y1))
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| 173 | self.canvas['cursor'] = oldcursor
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| 174 |
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| 175 | def draw(self, x, y):
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| 176 | # XXX This hard-codes too many geometry constants!
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| 177 | self.x, self.y = x, y
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| 178 | self.drawicon()
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| 179 | self.drawtext()
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| 180 | if self.state != 'expanded':
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| 181 | return y+17
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| 182 | # draw children
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| 183 | if not self.children:
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| 184 | sublist = self.item._GetSubList()
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| 185 | if not sublist:
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| 186 | # _IsExpandable() was mistaken; that's allowed
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| 187 | return y+17
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| 188 | for item in sublist:
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| 189 | child = self.__class__(self.canvas, self, item)
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| 190 | self.children.append(child)
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| 191 | cx = x+20
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| 192 | cy = y+17
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| 193 | cylast = 0
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| 194 | for child in self.children:
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| 195 | cylast = cy
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| 196 | self.canvas.create_line(x+9, cy+7, cx, cy+7, fill="gray50")
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| 197 | cy = child.draw(cx, cy)
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| 198 | if child.item._IsExpandable():
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| 199 | if child.state == 'expanded':
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| 200 | iconname = "minusnode"
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| 201 | callback = child.collapse
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| 202 | else:
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| 203 | iconname = "plusnode"
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| 204 | callback = child.expand
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| 205 | image = self.geticonimage(iconname)
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| 206 | id = self.canvas.create_image(x+9, cylast+7, image=image)
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| 207 | # XXX This leaks bindings until canvas is deleted:
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| 208 | self.canvas.tag_bind(id, "<1>", callback)
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| 209 | self.canvas.tag_bind(id, "<Double-1>", lambda x: None)
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| 210 | id = self.canvas.create_line(x+9, y+10, x+9, cylast+7,
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| 211 | ##stipple="gray50", # XXX Seems broken in Tk 8.0.x
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| 212 | fill="gray50")
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| 213 | self.canvas.tag_lower(id) # XXX .lower(id) before Python 1.5.2
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| 214 | return cy
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| 215 |
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| 216 | def drawicon(self):
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| 217 | if self.selected:
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| 218 | imagename = (self.item.GetSelectedIconName() or
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| 219 | self.item.GetIconName() or
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| 220 | "openfolder")
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| 221 | else:
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| 222 | imagename = self.item.GetIconName() or "folder"
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| 223 | image = self.geticonimage(imagename)
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| 224 | id = self.canvas.create_image(self.x, self.y, anchor="nw", image=image)
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| 225 | self.image_id = id
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| 226 | self.canvas.tag_bind(id, "<1>", self.select)
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| 227 | self.canvas.tag_bind(id, "<Double-1>", self.flip)
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| 228 |
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| 229 | def drawtext(self):
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| 230 | textx = self.x+20-1
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| 231 | texty = self.y-1
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| 232 | labeltext = self.item.GetLabelText()
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| 233 | if labeltext:
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| 234 | id = self.canvas.create_text(textx, texty, anchor="nw",
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| 235 | text=labeltext)
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| 236 | self.canvas.tag_bind(id, "<1>", self.select)
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| 237 | self.canvas.tag_bind(id, "<Double-1>", self.flip)
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| 238 | x0, y0, x1, y1 = self.canvas.bbox(id)
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| 239 | textx = max(x1, 200) + 10
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| 240 | text = self.item.GetText() or "<no text>"
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| 241 | try:
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| 242 | self.entry
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| 243 | except AttributeError:
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| 244 | pass
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| 245 | else:
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| 246 | self.edit_finish()
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| 247 | try:
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| 248 | label = self.label
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| 249 | except AttributeError:
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| 250 | # padding carefully selected (on Windows) to match Entry widget:
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| 251 | self.label = Label(self.canvas, text=text, bd=0, padx=2, pady=2)
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| 252 | theme = idleConf.GetOption('main','Theme','name')
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| 253 | if self.selected:
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| 254 | self.label.configure(idleConf.GetHighlight(theme, 'hilite'))
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| 255 | else:
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| 256 | self.label.configure(idleConf.GetHighlight(theme, 'normal'))
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| 257 | id = self.canvas.create_window(textx, texty,
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| 258 | anchor="nw", window=self.label)
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| 259 | self.label.bind("<1>", self.select_or_edit)
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| 260 | self.label.bind("<Double-1>", self.flip)
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| 261 | self.text_id = id
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| 262 |
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| 263 | def select_or_edit(self, event=None):
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| 264 | if self.selected and self.item.IsEditable():
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| 265 | self.edit(event)
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| 266 | else:
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| 267 | self.select(event)
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| 268 |
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| 269 | def edit(self, event=None):
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| 270 | self.entry = Entry(self.label, bd=0, highlightthickness=1, width=0)
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| 271 | self.entry.insert(0, self.label['text'])
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| 272 | self.entry.selection_range(0, END)
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| 273 | self.entry.pack(ipadx=5)
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| 274 | self.entry.focus_set()
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| 275 | self.entry.bind("<Return>", self.edit_finish)
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| 276 | self.entry.bind("<Escape>", self.edit_cancel)
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| 277 |
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| 278 | def edit_finish(self, event=None):
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| 279 | try:
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| 280 | entry = self.entry
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| 281 | del self.entry
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| 282 | except AttributeError:
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| 283 | return
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| 284 | text = entry.get()
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| 285 | entry.destroy()
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| 286 | if text and text != self.item.GetText():
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| 287 | self.item.SetText(text)
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| 288 | text = self.item.GetText()
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| 289 | self.label['text'] = text
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| 290 | self.drawtext()
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| 291 | self.canvas.focus_set()
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| 292 |
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| 293 | def edit_cancel(self, event=None):
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| 294 | try:
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| 295 | entry = self.entry
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| 296 | del self.entry
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| 297 | except AttributeError:
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| 298 | return
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| 299 | entry.destroy()
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| 300 | self.drawtext()
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| 301 | self.canvas.focus_set()
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| 302 |
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| 303 |
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| 304 | class TreeItem:
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| 305 |
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| 306 | """Abstract class representing tree items.
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| 307 |
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| 308 | Methods should typically be overridden, otherwise a default action
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| 309 | is used.
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| 310 |
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| 311 | """
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| 312 |
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| 313 | def __init__(self):
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| 314 | """Constructor. Do whatever you need to do."""
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| 315 |
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| 316 | def GetText(self):
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| 317 | """Return text string to display."""
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| 318 |
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| 319 | def GetLabelText(self):
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| 320 | """Return label text string to display in front of text (if any)."""
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| 321 |
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| 322 | expandable = None
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| 323 |
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| 324 | def _IsExpandable(self):
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| 325 | """Do not override! Called by TreeNode."""
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| 326 | if self.expandable is None:
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| 327 | self.expandable = self.IsExpandable()
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| 328 | return self.expandable
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| 329 |
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| 330 | def IsExpandable(self):
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| 331 | """Return whether there are subitems."""
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| 332 | return 1
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| 333 |
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| 334 | def _GetSubList(self):
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| 335 | """Do not override! Called by TreeNode."""
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| 336 | if not self.IsExpandable():
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| 337 | return []
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| 338 | sublist = self.GetSubList()
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| 339 | if not sublist:
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| 340 | self.expandable = 0
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| 341 | return sublist
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| 342 |
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| 343 | def IsEditable(self):
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| 344 | """Return whether the item's text may be edited."""
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| 345 |
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| 346 | def SetText(self, text):
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| 347 | """Change the item's text (if it is editable)."""
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| 348 |
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| 349 | def GetIconName(self):
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| 350 | """Return name of icon to be displayed normally."""
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| 351 |
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| 352 | def GetSelectedIconName(self):
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| 353 | """Return name of icon to be displayed when selected."""
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| 354 |
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| 355 | def GetSubList(self):
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| 356 | """Return list of items forming sublist."""
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| 357 |
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| 358 | def OnDoubleClick(self):
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| 359 | """Called on a double-click on the item."""
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| 360 |
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| 361 |
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| 362 | # Example application
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| 363 |
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| 364 | class FileTreeItem(TreeItem):
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| 365 |
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| 366 | """Example TreeItem subclass -- browse the file system."""
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| 367 |
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| 368 | def __init__(self, path):
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| 369 | self.path = path
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| 370 |
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| 371 | def GetText(self):
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| 372 | return os.path.basename(self.path) or self.path
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| 373 |
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| 374 | def IsEditable(self):
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| 375 | return os.path.basename(self.path) != ""
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| 376 |
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| 377 | def SetText(self, text):
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| 378 | newpath = os.path.dirname(self.path)
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| 379 | newpath = os.path.join(newpath, text)
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| 380 | if os.path.dirname(newpath) != os.path.dirname(self.path):
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| 381 | return
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| 382 | try:
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| 383 | os.rename(self.path, newpath)
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| 384 | self.path = newpath
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| 385 | except os.error:
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| 386 | pass
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| 387 |
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| 388 | def GetIconName(self):
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| 389 | if not self.IsExpandable():
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| 390 | return "python" # XXX wish there was a "file" icon
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| 391 |
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| 392 | def IsExpandable(self):
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| 393 | return os.path.isdir(self.path)
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| 394 |
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| 395 | def GetSubList(self):
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| 396 | try:
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| 397 | names = os.listdir(self.path)
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| 398 | except os.error:
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| 399 | return []
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| 400 | names.sort(key = os.path.normcase)
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| 401 | sublist = []
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| 402 | for name in names:
|
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| 403 | item = FileTreeItem(os.path.join(self.path, name))
|
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| 404 | sublist.append(item)
|
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| 405 | return sublist
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| 406 |
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| 407 |
|
|---|
| 408 | # A canvas widget with scroll bars and some useful bindings
|
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| 409 |
|
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| 410 | class ScrolledCanvas:
|
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| 411 | def __init__(self, master, **opts):
|
|---|
| 412 | if 'yscrollincrement' not in opts:
|
|---|
| 413 | opts['yscrollincrement'] = 17
|
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| 414 | self.master = master
|
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| 415 | self.frame = Frame(master)
|
|---|
| 416 | self.frame.rowconfigure(0, weight=1)
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| 417 | self.frame.columnconfigure(0, weight=1)
|
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| 418 | self.canvas = Canvas(self.frame, **opts)
|
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| 419 | self.canvas.grid(row=0, column=0, sticky="nsew")
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| 420 | self.vbar = Scrollbar(self.frame, name="vbar")
|
|---|
| 421 | self.vbar.grid(row=0, column=1, sticky="nse")
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| 422 | self.hbar = Scrollbar(self.frame, name="hbar", orient="horizontal")
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| 423 | self.hbar.grid(row=1, column=0, sticky="ews")
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| 424 | self.canvas['yscrollcommand'] = self.vbar.set
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| 425 | self.vbar['command'] = self.canvas.yview
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| 426 | self.canvas['xscrollcommand'] = self.hbar.set
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| 427 | self.hbar['command'] = self.canvas.xview
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| 428 | self.canvas.bind("<Key-Prior>", self.page_up)
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| 429 | self.canvas.bind("<Key-Next>", self.page_down)
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| 430 | self.canvas.bind("<Key-Up>", self.unit_up)
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| 431 | self.canvas.bind("<Key-Down>", self.unit_down)
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| 432 | #if isinstance(master, Toplevel) or isinstance(master, Tk):
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| 433 | self.canvas.bind("<Alt-Key-2>", self.zoom_height)
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| 434 | self.canvas.focus_set()
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| 435 | def page_up(self, event):
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| 436 | self.canvas.yview_scroll(-1, "page")
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| 437 | return "break"
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| 438 | def page_down(self, event):
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| 439 | self.canvas.yview_scroll(1, "page")
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| 440 | return "break"
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| 441 | def unit_up(self, event):
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| 442 | self.canvas.yview_scroll(-1, "unit")
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| 443 | return "break"
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| 444 | def unit_down(self, event):
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| 445 | self.canvas.yview_scroll(1, "unit")
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| 446 | return "break"
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| 447 | def zoom_height(self, event):
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| 448 | ZoomHeight.zoom_height(self.master)
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| 449 | return "break"
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| 450 |
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| 451 |
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| 452 | # Testing functions
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| 453 |
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| 454 | def test():
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| 455 | from idlelib import PyShell
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| 456 | root = Toplevel(PyShell.root)
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| 457 | root.configure(bd=0, bg="yellow")
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| 458 | root.focus_set()
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| 459 | sc = ScrolledCanvas(root, bg="white", highlightthickness=0, takefocus=1)
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| 460 | sc.frame.pack(expand=1, fill="both")
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| 461 | item = FileTreeItem("C:/windows/desktop")
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| 462 | node = TreeNode(sc.canvas, None, item)
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| 463 | node.expand()
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| 464 |
|
|---|
| 465 | def test2():
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|---|
| 466 | # test w/o scrolling canvas
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|---|
| 467 | root = Tk()
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|---|
| 468 | root.configure(bd=0)
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|---|
| 469 | canvas = Canvas(root, bg="white", highlightthickness=0)
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|---|
| 470 | canvas.pack(expand=1, fill="both")
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|---|
| 471 | item = FileTreeItem(os.curdir)
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|---|
| 472 | node = TreeNode(canvas, None, item)
|
|---|
| 473 | node.update()
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|---|
| 474 | canvas.focus_set()
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|---|
| 475 |
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|---|
| 476 | if __name__ == '__main__':
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|---|
| 477 | test()
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|---|
