"""Incremental demo for wx support of tasks.

Multiple tasks

Note that naively subclassing SecondTask from ExampleTask, it initially used
the same menu_bar and tool_bars traits from ExampleTask.  This caused the
incorrect tying of the controls to SecondTask because the class attributes
were shared between both classes.
"""

import logging

logging.basicConfig(level=logging.DEBUG)

import wx


from pyface.action.schema.api import SMenu, SMenuBar, SToolBar
from pyface.api import (
    GUI,
    ConfirmationDialog,
    FileDialog,
    ImageResource,
    YES,
    OK,
    CANCEL,
)
from pyface.tasks.api import (
    Task,
    TaskWindow,
    TaskLayout,
    PaneItem,
    IEditor,
    IEditorAreaPane,
    EditorAreaPane,
    Editor,
    DockPane,
    HSplitter,
    VSplitter,
)
from pyface.tasks.action.api import (
    DockPaneToggleGroup,
    TaskAction,
    TaskToggleGroup,
)
from traits.api import Property, Instance, Str, List


class Pane1(DockPane):
    # TaskPane interface ---------------------------------------------------

    id = "steps.pane1"
    name = "Pane 1"


class Pane2(DockPane):
    # TaskPane interface ---------------------------------------------------

    id = "steps.pane2"
    name = "Pane 2"

    # FileBrowserPane interface --------------------------------------------

    # The list of wildcard filters for filenames.
    filters = List(Str)

    def create_contents(self, parent):
        control = wx.GenericDirCtrl(
            parent, -1, size=(200, -1), style=wx.NO_BORDER
        )
        control.Bind(wx.EVT_TREE_ITEM_ACTIVATED, self.on_selected)
        return control

    def on_selected(self, evt):
        selected_file = self.control.GetFilePath()
        wx.CallAfter(
            self.task.window.application.load_file,
            selected_file,
            self.task,
            in_current_window=True,
        )


class ExampleTask(Task):
    """ A simple task for opening a blank editor.
    """

    # Task interface -------------------------------------------------------

    id = "example.example_task"
    name = "Multi-Tab Editor"

    active_editor = Property(
        Instance(IEditor), observe="editor_area.active_editor"
    )

    editor_area = Instance(IEditorAreaPane)

    menu_bar = SMenuBar(
        SMenu(
            TaskAction(name="New", method="new", accelerator="Ctrl+N"),
            id="File",
            name="&File",
        ),
        SMenu(
            DockPaneToggleGroup(), TaskToggleGroup(), id="View", name="&View"
        ),
    )

    tool_bars = [
        SToolBar(
            TaskAction(
                method="new",
                tooltip="New file",
                image=ImageResource("document_new"),
            ),
            image_size=(32, 32),
        )
    ]

    # ------------------------------------------------------------------------
    # 'Task' interface.
    # ------------------------------------------------------------------------

    def _default_layout_default(self):
        return TaskLayout(
            top=VSplitter(
                HSplitter(PaneItem("steps.pane1"), PaneItem("steps.pane2"))
            )
        )

    def create_central_pane(self):
        """ Create the central pane: the script editor.
        """
        self.editor_area = EditorAreaPane()
        return self.editor_area

    def create_dock_panes(self):
        """ Create the file browser and connect to its double click event.
        """
        return [Pane1(), Pane2()]

    # ------------------------------------------------------------------------
    # 'ExampleTask' interface.
    # ------------------------------------------------------------------------

    def new(self):
        """ Opens a new empty window
        """
        editor = Editor()
        self.editor_area.add_editor(editor)
        self.editor_area.activate_editor(editor)
        self.activated()

    # Trait property getter/setters ----------------------------------------

    def _get_active_editor(self):
        if self.editor_area is not None:
            return self.editor_area.active_editor
        return None


class SecondTask(ExampleTask):
    """ A simple task for opening a blank editor.
    """

    # Task interface -------------------------------------------------------

    id = "example.second_task"
    name = "Second Multi-Tab Editor"

    menu_bar = SMenuBar(
        SMenu(
            TaskAction(name="New", method="new", accelerator="Ctrl+N"),
            id="File",
            name="&File",
        ),
        SMenu(
            DockPaneToggleGroup(), TaskToggleGroup(), id="View", name="&View"
        ),
    )

    tool_bars = [
        SToolBar(
            TaskAction(
                method="new",
                tooltip="New file",
                image=ImageResource("document_new"),
            ),
            TaskAction(
                method="new",
                tooltip="New file",
                image=ImageResource("document_new"),
            ),
            image_size=(32, 32),
        )
    ]

    # ------------------------------------------------------------------------
    # 'Task' interface.
    # ------------------------------------------------------------------------

    def _default_layout_default(self):
        return TaskLayout(
            left=VSplitter(
                HSplitter(PaneItem("steps.pane1"), PaneItem("steps.pane2"))
            )
        )


def main(argv):
    """ A simple example of using Tasks.
    """
    # Create the GUI (this does NOT start the GUI event loop).
    gui = GUI()

    # Create a Task and add it to a TaskWindow.
    task1 = ExampleTask()
    task2 = SecondTask()
    window = TaskWindow(size=(800, 600))
    window.add_task(task1)
    window.add_task(task2)

    # Show the window.
    window.open()

    # Start the GUI event loop.
    gui.start_event_loop()


if __name__ == "__main__":
    import sys

    main(sys.argv)