mirror of
https://github.com/wxWidgets/Phoenix.git
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308 lines
10 KiB
Python
308 lines
10 KiB
Python
import sys
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import wx
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import wx.dataview as dv
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import random
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#----------------------------------------------------------------------
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def makeBlank(self):
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# Just a little helper function to make an empty image for our
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# model to use.
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empty = wx.Bitmap(16,16,32)
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dc = wx.MemoryDC(empty)
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dc.SetBackground(wx.Brush((0,0,0,0)))
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dc.Clear()
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del dc
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return empty
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#----------------------------------------------------------------------
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# We'll use instaces of these classes to hold our music data. Items in the
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# tree will get associated back to the coresponding Song or Genre object.
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class Song(object):
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def __init__(self, id, artist, title, genre):
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self.id = id
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self.artist = artist
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self.title = title
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self.genre = genre
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self.like = False
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# get a random date value
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d = random.choice(range(27))+1
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m = random.choice(range(12))
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y = random.choice(range(1980, 2005))
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self.date = wx.DateTime.FromDMY(d,m,y)
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def __repr__(self):
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return 'Song: %s-%s' % (self.artist, self.title)
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class Genre(object):
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def __init__(self, name):
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self.name = name
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self.songs = []
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def __repr__(self):
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return 'Genre: ' + self.name
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#----------------------------------------------------------------------
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# This model acts as a bridge between the DataViewCtrl and the music data, and
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# organizes it hierarchically as a collection of Genres, each of which is a
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# collection of songs.
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# This model provides these data columns:
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#
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# 0. Genre: string
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# 1. Artist: string
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# 2. Title: string
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# 3. id: integer
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# 4. Aquired: date
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# 5. Liked: bool
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#
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class MyTreeListModel(dv.PyDataViewModel):
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def __init__(self, data, log):
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dv.PyDataViewModel.__init__(self)
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self.data = data
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self.log = log
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# The PyDataViewModel derives from both DataViewModel and from
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# DataViewItemObjectMapper, which has methods that help associate
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# data view items with Python objects. Normally a dictionary is used
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# so any Python object can be used as data nodes. If the data nodes
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# are weak-referencable then the objmapper can use a
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# WeakValueDictionary instead.
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self.UseWeakRefs(True)
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# Report how many columns this model provides data for.
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def GetColumnCount(self):
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return 6
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def GetChildren(self, parent, children):
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# The view calls this method to find the children of any node in the
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# control. There is an implicit hidden root node, and the top level
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# item(s) should be reported as children of this node. A List view
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# simply provides all items as children of this hidden root. A Tree
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# view adds additional items as children of the other items, as needed,
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# to provide the tree hierachy.
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# If the parent item is invalid then it represents the hidden root
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# item, so we'll use the genre objects as its children and they will
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# end up being the collection of visible roots in our tree.
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if not parent:
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for genre in self.data:
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children.append(self.ObjectToItem(genre))
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return len(self.data)
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# Otherwise we'll fetch the python object associated with the parent
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# item and make DV items for each of it's child objects.
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node = self.ItemToObject(parent)
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if isinstance(node, Genre):
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for song in node.songs:
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children.append(self.ObjectToItem(song))
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return len(node.songs)
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return 0
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def IsContainer(self, item):
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# Return True if the item has children, False otherwise.
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# The hidden root is a container
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if not item:
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return True
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# and in this model the genre objects are containers
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node = self.ItemToObject(item)
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if isinstance(node, Genre):
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return True
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# but everything else (the song objects) are not
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return False
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def GetParent(self, item):
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# Return the item which is this item's parent.
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##self.log.write("GetParent\n")
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if not item:
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return dv.NullDataViewItem
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node = self.ItemToObject(item)
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if isinstance(node, Genre):
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return dv.NullDataViewItem
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elif isinstance(node, Song):
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for g in self.data:
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if g.name == node.genre:
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return self.ObjectToItem(g)
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def GetValue(self, item, col):
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# Return the value to be displayed for this item and column. For this
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# example we'll just pull the values from the data objects we
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# associated with the items in GetChildren.
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# Fetch the data object for this item.
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node = self.ItemToObject(item)
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if isinstance(node, Genre):
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# We'll only use the first column for the Genre objects,
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# for the other columns lets just return empty values
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mapper = { 0 : node.name,
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1 : "",
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2 : "",
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3 : "",
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4 : wx.DateTime.FromTimeT(0), # TODO: There should be some way to indicate a null value...
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5 : False,
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}
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return mapper[col]
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elif isinstance(node, Song):
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mapper = { 0 : node.genre,
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1 : node.artist,
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2 : node.title,
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3 : node.id,
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4 : node.date,
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5 : node.like,
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}
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return mapper[col]
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else:
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raise RuntimeError("unknown node type")
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def GetAttr(self, item, col, attr):
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##self.log.write('GetAttr')
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node = self.ItemToObject(item)
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if isinstance(node, Genre):
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attr.SetColour('blue')
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attr.SetBold(True)
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return True
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return False
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def SetValue(self, value, item, col):
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self.log.write("SetValue: col %d, %s\n" % (col, value))
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# We're not allowing edits in column zero (see below) so we just need
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# to deal with Song objects and cols 1 - 5
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node = self.ItemToObject(item)
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if isinstance(node, Song):
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if col == 1:
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node.artist = value
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elif col == 2:
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node.title = value
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elif col == 3:
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node.id = value
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elif col == 4:
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node.date = value
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elif col == 5:
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node.like = value
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return True
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#----------------------------------------------------------------------
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class TestPanel(wx.Panel):
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def __init__(self, parent, log, data=None, model=None):
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self.log = log
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wx.Panel.__init__(self, parent, -1)
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# Create a dataview control
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self.dvc = dv.DataViewCtrl(self,
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style=wx.BORDER_THEME
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| dv.DV_ROW_LINES # nice alternating bg colors
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#| dv.DV_HORIZ_RULES
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| dv.DV_VERT_RULES
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| dv.DV_MULTIPLE
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)
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# Create an instance of our model...
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if model is None:
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self.model = MyTreeListModel(data, log)
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else:
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self.model = model
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# Tel the DVC to use the model
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self.dvc.AssociateModel(self.model)
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# Define the columns that we want in the view. Notice the
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# parameter which tells the view which col in the data model to pull
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# values from for each view column.
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if 0:
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self.tr = tr = dv.DataViewTextRenderer()
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c0 = dv.DataViewColumn("Genre", # title
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tr, # renderer
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0, # data model column
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width=80)
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self.dvc.AppendColumn(c0)
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else:
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self.dvc.AppendTextColumn("Genre", 0, width=80)
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c1 = self.dvc.AppendTextColumn("Artist", 1, width=170, mode=dv.DATAVIEW_CELL_EDITABLE)
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c2 = self.dvc.AppendTextColumn("Title", 2, width=260, mode=dv.DATAVIEW_CELL_EDITABLE)
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c3 = self.dvc.AppendDateColumn('Acquired', 4, width=100, mode=dv.DATAVIEW_CELL_ACTIVATABLE)
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c4 = self.dvc.AppendToggleColumn('Like', 5, width=40, mode=dv.DATAVIEW_CELL_ACTIVATABLE)
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# Notice how we pull the data from col 3, but this is the 6th col
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# added to the DVC. The order of the view columns is not dependent on
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# the order of the model columns at all.
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c5 = self.dvc.AppendTextColumn("id", 3, width=40, mode=dv.DATAVIEW_CELL_EDITABLE)
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c5.Alignment = wx.ALIGN_RIGHT
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# Set some additional attributes for all the columns
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for c in self.dvc.Columns:
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c.Sortable = True
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c.Reorderable = True
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self.Sizer = wx.BoxSizer(wx.VERTICAL)
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self.Sizer.Add(self.dvc, 1, wx.EXPAND)
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b1 = wx.Button(self, label="New View", name="newView")
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self.Bind(wx.EVT_BUTTON, self.OnNewView, b1)
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self.Sizer.Add(b1, 0, wx.ALL, 5)
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def OnNewView(self, evt):
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f = wx.Frame(None, title="New view, shared model", size=(600,400))
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TestPanel(f, self.log, model=self.model)
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b = f.FindWindowByName("newView")
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b.Disable()
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f.Show()
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#----------------------------------------------------------------------
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def main():
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from data import musicdata
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# our data structure will be a collection of Genres, each of which is a
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# collection of Songs
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data = dict()
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for key, artist, title, genre in musicdata:
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song = Song(str(key), artist, title, genre)
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genre = data.get(song.genre)
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if genre is None:
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genre = Genre(song.genre)
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data[song.genre] = genre
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genre.songs.append(song)
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data = data.values()
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app = wx.App()
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frm = wx.Frame(None, title="DataViewModel sample", size=(700,500))
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pnl = TestPanel(frm, sys.stdout, data=data)
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frm.Show()
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app.MainLoop()
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#----------------------------------------------------------------------
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if __name__ == '__main__':
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main()
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