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# Source code for camelot.view.controls.editors.fileeditor

    #  ============================================================================
    #
    #  Copyright (C) 2007-2011 Conceptive Engineering bvba. All rights reserved.
    #  www.conceptive.be / project-camelot@conceptive.be
    #
    #  This file is part of the Camelot Library.
    #
    #  This file may be used under the terms of the GNU General Public
    #  License version 2.0 as published by the Free Software Foundation
    #  and appearing in the file license.txt included in the packaging of
    #  this file.  Please review this information to ensure GNU
    #  General Public Licensing requirements will be met.
    #
    #  If you are unsure which license is appropriate for your use, please
    #  visit www.python-camelot.com or contact project-camelot@conceptive.be
    #
    #  This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    #  WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    #
    #  For use of this library in commercial applications, please contact
    #  project-camelot@conceptive.be
    #
    #  ============================================================================

    from PyQt4 import QtGui
    from PyQt4.QtCore import Qt

    from customeditor import CustomEditor, set_background_color_palette

    from camelot.view.art import Icon
    from camelot.core.utils import ugettext as _

    from camelot.view.controls.decorated_line_edit import DecoratedLineEdit

    class FileEditor(CustomEditor):
        """Widget for editing File fields"""

        filter = 'All files (*)'
        new_icon = Icon( 'tango/16x16/actions/list-add.png' )
        open_icon = Icon( 'tango/16x16/actions/document-open.png' )
        clear_icon = Icon( 'tango/16x16/actions/edit-delete.png' )
        save_as_icon = Icon( 'tango/16x16/actions/document-save-as.png' )
        document_pixmap = Icon( 'tango/16x16/mimetypes/x-office-document.png' )

        def __init__(self, parent=None,
                     storage=None,
                     field_name='file',
                     remove_original=False,
                     **kwargs):
            CustomEditor.__init__(self, parent)
            self.setObjectName( field_name )
            self.storage = storage
            self.filename = None # the widget containing the filename
            self.value = None
            self.remove_original = remove_original
            self.setup_widget()

        def setup_widget(self):
            """Called inside init, overwrite this method for custom
            file edit widgets"""
            self.layout = QtGui.QHBoxLayout()
            self.layout.setSpacing(0)
            self.layout.setContentsMargins(0, 0, 0, 0)

            # Save As button
            self.save_as_button = QtGui.QToolButton()
            self.save_as_button.setFocusPolicy(Qt.StrongFocus)
            self.save_as_button.setIcon(self.save_as_icon.getQIcon())
            self.save_as_button.setToolTip(_('Save file as'))
            self.save_as_button.setAutoRaise(True)
            self.save_as_button.clicked.connect(self.save_as_button_clicked)

            # Clear button
            self.clear_button = QtGui.QToolButton()
            self.clear_button.setFocusPolicy(Qt.StrongFocus)
            self.clear_button.setIcon(self.clear_icon.getQIcon())
            self.clear_button.setToolTip(_('delete file'))
            self.clear_button.setAutoRaise(True)
            self.clear_button.clicked.connect(self.clear_button_clicked)

            # Open button
            self.open_button = QtGui.QToolButton()
            self.open_button.setFocusPolicy(Qt.StrongFocus)
            self.open_button.setIcon(self.new_icon.getQIcon())
            self.open_button.setToolTip(_('add file'))
            self.open_button.clicked.connect(self.open_button_clicked)
            self.open_button.setAutoRaise(True)

            # Filename
            self.filename = DecoratedLineEdit(self)
            self.filename.set_minimum_width( 20 )

            # Search Completer
            #
            # Turn completion off, since it creates a thread per field on a form
            #
            # self.completer = QtGui.QCompleter()
            # self.completions_model = QtGui.QFileSystemModel()
            # self.completer.setCompletionMode(
            #    QtGui.QCompleter.UnfilteredPopupCompletion
            # )
            # self.completer.setModel( self.completions_model )
            # self.completer.activated[QtCore.QModelIndex].connect(self.file_completion_activated)
            # self.filename.setCompleter( self.completer )
            # settings = QtCore.QSettings()
            # last_path = settings.value('lastpath').toString()

            # # This setting of a rootPath causes a major delay on Windows, since
            # # the QFileSystemModel starts to fetch file information in a non-
            # # blocking way (although the documentation state the opposite).
            # # On Linux, there is no such delay, so it's safe to set such a root
            # # path and let the underlaying system start indexing.
            # import sys
            # if sys.platform != "win32":
            #    self.completions_model.setRootPath( last_path )

            # Setup layout
            self.document_label = QtGui.QLabel(self)
            self.document_label.setPixmap(self.document_pixmap.getQPixmap())
            self.layout.addWidget(self.document_label)
            self.layout.addWidget(self.filename)
            self.layout.addWidget(self.clear_button)
            self.layout.addWidget(self.open_button)
            self.layout.addWidget(self.save_as_button)
            self.setLayout(self.layout)

        def file_completion_activated(self, index):
            from camelot.view.storage import create_stored_file
            source_index = index.model().mapToSource( index )
            if not self.completions_model.isDir( source_index ):
                path = self.completions_model.filePath( source_index )
                create_stored_file(
                    self,
                    self.storage,
                    self.stored_file_ready,
                    filter=self.filter,
                    remove_original=self.remove_original,
                    filename = path,
                )

        def set_tab_order(self):
            if self.filename.text() != '':
                self.setTabOrder(self.clear_button, self.filename)
            else:
                self.setTabOrder(self.clear_button, self.filename)
                self.setTabOrder(self.open_button, self.clear_button)

        def set_value(self, value):
            value = CustomEditor.set_value(self, value)
            self.value = value
            if value:
                self.save_as_button.setVisible(True)
                self.filename.setText(value.verbose_name)
                self.open_button.setIcon(self.open_icon.getQIcon())
                self.open_button.setToolTip(_('open file'))
            else:
                self.save_as_button.setVisible(False)
                self.filename.setText('')
                self.open_button.setIcon(self.new_icon.getQIcon())
                self.open_button.setToolTip(_('add file'))
            self.set_tab_order()
            return value

        def get_value(self):
            return CustomEditor.get_value(self) or self.value

        def set_field_attributes(self, editable = True,
                                       background_color = None,
                                       tooltip = None,
                                       remove_original = False, **kwargs):
            self.set_enabled(editable)
            if self.filename:
                set_background_color_palette( self.filename, background_color )
                self.filename.setToolTip(unicode(tooltip or ''))
            self.remove_original = remove_original

        def set_enabled(self, editable=True):
            self.clear_button.setEnabled(editable)
            self.open_button.setEnabled(editable)
            self.filename.setEnabled(editable)
            self.filename.setReadOnly(not editable)
            self.document_label.setEnabled(editable)
            self.setAcceptDrops(editable)

        def stored_file_ready(self, stored_file):
            """Slot to be called when a new stored_file has been created by
            the storage"""
            self.set_value(stored_file)
            self.editingFinished.emit()

        def save_as_button_clicked(self):
            from camelot.view.storage import save_stored_file
            value = self.get_value()
            if value:
                save_stored_file(self, value)

        def open_button_clicked(self):
            from camelot.view.storage import open_stored_file
            from camelot.view.storage import create_stored_file
            if not self.value:
                create_stored_file(
                    self,
                    self.storage,
                    self.stored_file_ready,
                    filter=self.filter,
                    remove_original=self.remove_original,
                )
            else:
                open_stored_file(self, self.value)

        def clear_button_clicked(self):
            self.value = None
            self.editingFinished.emit()

        #
        # Drag & Drop
        #
        def dragEnterEvent(self, event):
            event.acceptProposedAction()

        def dragMoveEvent(self, event):
            event.acceptProposedAction()

        def dropEvent(self, event):
            from camelot.view.storage import create_stored_file
            if event.mimeData().hasUrls():
                url = event.mimeData().urls()[0]
                filename = url.toLocalFile()
                if filename:
                    create_stored_file(
                        self,
                        self.storage,
                        self.stored_file_ready,
                        filter=self.filter,
                        remove_original=self.remove_original,
                        filename = filename,
                    )

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