test/data/vclamp_jpk/README: Document sample versions
[hooke.git] / hooke / ui / gui / panel / commands.py
index d26d5b0cd97536176305cdb4a56394f40ac2498f..3eefc0759f91cbc04397a25a34d9697185ffe44c 100644 (file)
-#!/usr/bin/env python\r
-\r
-"""Commands and settings panel for Hooke.\r
-"""\r
-\r
-import os.path\r
-\r
-import wx\r
-\r
-\r
-class Tree (wx.TreeCtrl):\r
-    def __init__(self, commands, selected, *args, **kwargs):\r
-        super(Tree, self).__init__(*args, **kwargs)\r
-        imglist = wx.ImageList(width=16, height=16, mask=True, initialCount=2)\r
-        imglist.Add(wx.ArtProvider.GetBitmap(\r
-                wx.ART_FOLDER, wx.ART_OTHER, wx.Size(16, 16)))\r
-        imglist.Add(wx.ArtProvider.GetBitmap(\r
-                wx.ART_EXECUTABLE_FILE, wx.ART_OTHER, wx.Size(16, 16)))\r
-        self.AssignImageList(imglist)\r
-        self.image = {\r
-            'root': 0,\r
-            'plugin': 0,\r
-            'command': 1,\r
-            }\r
-        self.AddRoot(text='Commands and Settings', image=self.image['root'])\r
-\r
-        self._setup_commands(commands, selected)\r
-\r
-    def _setup_commands(self, commands, selected):\r
-        self._commands = commands\r
-        selected = None\r
-        tree_root = self.GetRootItem()\r
-\r
-        plugin_roots = {}\r
-        plugins = sorted(set([c.plugin for c in commands]),\r
-                         key=lambda p:p.name)\r
-        for plugin in plugins:\r
-            plugin_roots[plugin.name] = self.AppendItem(\r
-                parent=tree_root,\r
-                text=plugin.name,\r
-                image=self.image['plugin'],\r
-                data=wx.TreeItemData(plugin))\r
-\r
-        for command in sorted(commands, key=lambda c:c.name):\r
-            item = self.AppendItem(\r
-                parent=plugin_roots[command.plugin.name],\r
-                text=command.name,\r
-                image=self.image['command'])\r
-            if command.name == selected:\r
-                selected = item\r
-        for key,value in plugin_roots.items():\r
-            self.Expand(value)\r
-        #make sure the selected command/plugin is visible in the tree\r
-        if selected is not None:\r
-            self.SelectItem(selected, True)\r
-            self.EnsureVisible(selected)\r
-\r
-\r
-class Commands (wx.Panel):\r
-    def __init__(self, commands, selected, *args, **kwargs):\r
-        super(Commands, self).__init__(*args, **kwargs)\r
-        self._c = {\r
-            'tree': Tree(\r
-                commands=commands,\r
-                selected=selected,\r
-                parent=self,\r
-                pos=wx.Point(0, 0),\r
-                size=wx.Size(160, 250),\r
-                style=wx.TR_DEFAULT_STYLE|wx.NO_BORDER|wx.TR_HIDE_ROOT),\r
-            'execute': wx.Button(self, label='Execute'),\r
-            }\r
-        sizer = wx.BoxSizer(wx.VERTICAL)\r
-        sizer.Add(self._c['execute'], 0, wx.EXPAND)\r
-        sizer.Add(self._c['tree'], 1, wx.EXPAND)\r
-        self.SetSizer(sizer)\r
-        sizer.Fit(self)\r
+#!/usr/bin/env python
+
+"""Commands and settings panel for Hooke.
+
+This panel handles command generation of
+:class:`hooke.engine.CommandMessage`\s for all of the commands that
+don't have panels of their own.  Actually it can generate
+:class:`hooke.engine.CommandMessage`\s for those as well, but the
+command-specific panel will probably have a nicer interface.
+
+# TODO: command arguments.
+"""
+
+import types
+
+import wx
+
+from ....util.callback import callback, in_callback
+from . import Panel
+
+
+class Tree (wx.TreeCtrl):
+    """The main widget of :class:`CommandsPanel`.
+
+    `callbacks` is shared with the parent :class:`Commands`.
+    """
+    def __init__(self, commands, selected, callbacks, *args, **kwargs):
+        super(Tree, self).__init__(*args, **kwargs)
+        imglist = wx.ImageList(width=16, height=16, mask=True, initialCount=2)
+        imglist.Add(wx.ArtProvider.GetBitmap(
+                wx.ART_FOLDER, wx.ART_OTHER, wx.Size(16, 16)))
+        imglist.Add(wx.ArtProvider.GetBitmap(
+                wx.ART_EXECUTABLE_FILE, wx.ART_OTHER, wx.Size(16, 16)))
+        self.AssignImageList(imglist)
+        self.image = {
+            'root': 0,
+            'plugin': 0,
+            'command': 1,
+            }
+        self._c = {
+            'root': self.AddRoot(
+                text='Commands and Settings', image=self.image['root']),
+            }
+        self.Bind(wx.EVT_TREE_SEL_CHANGED, self._on_selection_changed)
+        self.Bind(wx.EVT_TREE_ITEM_ACTIVATED, self._on_execute)
+        self.Bind(wx.EVT_MOTION, self._on_motion)
+
+        self._callbacks = callbacks
+        self._setup_commands(commands, selected)
+        self._last_tooltip = None
+
+    def _setup_commands(self, commands, selected):
+        self._plugins = {}    # {name: hooke.plugin.Plugin()}
+        self._commands = {}   # {name: hooke.command.Command()}
+
+        # In both of the following dicts, command names are
+        # (plugin.name, command.name) to avoid cross-plugin
+        # collisions.  See ._is_command().
+        self._id_for_name = {}  # {name: id}
+        self._name_for_id = {}  # {id: name}
+
+        selected = None
+        plugins = sorted(set([c.plugin for c in commands]),
+                         key=lambda p:p.name)
+        for plugin in plugins:
+            self._plugins[plugin.name] = plugin
+            _id = self.AppendItem(
+                parent=self._c['root'],
+                text=plugin.name,
+                image=self.image['plugin'])
+            self._id_for_name[plugin.name] = _id
+            self._name_for_id[_id] = plugin.name
+        for command in sorted(commands, key=lambda c:c.name):
+            name = (command.plugin.name, command.name)
+            self._commands[name] = command
+            _id = self.AppendItem(
+                parent=self._id_for_name[command.plugin.name],
+                text=command.name,
+                image=self.image['command'])
+            self._id_for_name[name] = _id
+            self._name_for_id[_id] = name
+            if command.name == selected:
+                selected = _id
+
+        #for plugin in self._plugins.values():
+        #    self.Expand(self._id_for_name[plugin.name])
+        # make sure the selected command/plugin is visible in the tree
+        if selected is not None:
+            self.SelectItem(selected, True)
+            self.EnsureVisible(selected)
+
+    def _is_command(self, name):  # name from ._id_for_name / ._name_for_id
+        """Return `True` if `name` corresponds to a :class:`hooke.command.Command`.
+        """
+        # Plugin names are strings, Command names are tuples.
+        # See ._setup_commands().
+        return not isinstance(name, types.StringTypes)
+
+    def _canonical_id(self, _id):
+        """Return a canonical form of `_id` suitable for accessing `._name_for_id`.
+
+        For some reason, `.GetSelection()`, etc. return items that
+        hash differently than the original `.AppendItem()`-returned
+        IDs.  This means that `._name_for_id[self.GetSelection()]`
+        will raise `KeyError`, even if there is an id `X` in
+        `._name_for_id` for which `X == self.GetSelection()` will
+        return `True`.  This method "canonicalizes" IDs so that the
+        hashing is consistent.
+        """
+        for c_id in self._name_for_id.keys():
+            if c_id == _id:
+                return c_id
+        raise KeyError(_id)
+
+    def _on_selection_changed(self, event):
+        active_id = event.GetItem()
+        selected_id = self.GetSelection()
+        name = self._name_for_id[self._canonical_id(selected_id)]
+        if self._is_command(name):
+            self.select_command(self._commands[name])
+        else:
+            self.select_plugin(self._plugins[name])
+
+    def _on_execute(self, event):
+        self.execute()
+
+    def _on_motion(self, event):
+        """Enable tooltips.
+        """
+        hit_id,hit_flags = self.HitTest(event.GetPosition())
+        try:
+            hit_id = self._canonical_id(hit_id)
+        except KeyError:
+            hit_id = None
+        if hit_id == None:
+            msg = ''
+        else:
+            name = self._name_for_id[hit_id]
+            if self._is_command(name):
+                msg = self._commands[name].help()
+            else:
+                msg = ''  # self._plugins[name].help() TODO: Plugin.help method
+        if msg != self._last_tooltip:
+            self._last_tooltip = msg
+            event.GetEventObject().SetToolTipString(msg)
+
+    def select_plugin(self, plugin):
+        in_callback(self, plugin)
+
+    def select_command(self, command):
+        in_callback(self, command)
+
+    def execute(self):
+        _id = self.GetSelection()
+        name = self._name_for_id[self._canonical_id(_id)]
+        if self._is_command(name):
+            command = self._commands[name]
+            in_callback(self, command)
+
+
+class CommandsPanel (Panel, wx.Panel):
+    """UI for selecting from available commands.
+
+    `callbacks` is shared with the underlying :class:`Tree`.
+    """
+    def __init__(self, callbacks=None, commands=None, selected=None, **kwargs):
+        super(CommandsPanel, self).__init__(
+            name='commands', callbacks=callbacks, **kwargs)
+        self._c = {
+            'tree': Tree(
+                commands=commands,
+                selected=selected,
+                callbacks=callbacks,
+                parent=self,
+                pos=wx.Point(0, 0),
+                size=wx.Size(160, 250),
+                style=wx.TR_DEFAULT_STYLE|wx.NO_BORDER|wx.TR_HIDE_ROOT),
+            'execute': wx.Button(self, label='Execute'),
+            }
+        sizer = wx.BoxSizer(wx.VERTICAL)
+        sizer.Add(self._c['execute'], 0, wx.EXPAND)
+        sizer.Add(self._c['tree'], 1, wx.EXPAND)
+        # Put 'tree' second because its min size may be large enough
+        # to push the button out of view.
+        self.SetSizer(sizer)
+        sizer.Fit(self)
+
+        self.Bind(wx.EVT_BUTTON, self._on_execute_button)
+
+    def _on_execute_button(self, event):
+        self._c['tree'].execute()