8 files changed, 510 insertions, 0 deletions
diff --git a/src/gui/tags/panel/dialog.py b/src/gui/tags/panel/dialog.py
new file mode 100644
index 0000000..7a6d3bc
--- /dev/null
+++ b/src/gui/tags/panel/dialog.py
@@ -0,0 +1,65 @@
+from PyQt5 import QtCore, QtWidgets
+
+from model.tag import Tag, ValidTagForm
+
+import db.tags
+import gui.tags.panel.form.widget
+import database
+
+def add(parent_widget, add_tag_signal):
+
+    def on_add(form: ValidTagForm):
+        tag = db.tags.insert(database.cursor(), form)
+        database.commit()
+        add_tag_signal.emit(tag)
+
+    return widget(parent_widget, 'Add a tag', 'add', None, on_add)
+
+def update(parent_widget, update_tag_signal, row, tag):
+
+    def on_update(form: ValidTagForm):
+        updated_tag = db.tags.update(database.cursor(), tag, form)
+        update_tag_signal.emit(row, updated_tag)
+        database.commit()
+
+    return widget(parent_widget, 'Modify a tag', 'modify', tag, on_update)
+
+def show_delete(table, rows):
+    confirm = QtWidgets.QMessageBox.question(
+        table,
+        'Tag deletion',
+        'Do you really want to delete the selected tags ?',
+        QtWidgets.QMessageBox.No | QtWidgets.QMessageBox.Yes,
+        QtWidgets.QMessageBox.Yes)
+
+    if confirm == QtWidgets.QMessageBox.Yes:
+        db.tags.delete(database.cursor(), table.model().row_ids(rows))
+        database.commit()
+        table.model().delete_tags(rows)
+
+def widget(
+        parent: QtWidgets.QWidget,
+        title: str,
+        action_title: str,
+        tag: Tag,
+        on_validated):
+
+    dialog = QtWidgets.QDialog(parent)
+    dialog.setWindowTitle(title)
+    dialog.setMinimumSize(QtCore.QSize(320, 240))
+
+    layout = QtWidgets.QVBoxLayout(dialog)
+    dialog.setLayout(layout)
+
+    def on_dialog_validated(form):
+        dialog.accept()
+        on_validated(form)
+
+    layout.addWidget(gui.tags.panel.form.widget.widget(
+        parent = dialog,
+        action_title = action_title,
+        tag = tag,
+        on_validated = on_dialog_validated,
+        on_cancel = lambda: dialog.reject()))
+
+    return dialog
diff --git a/src/gui/tags/panel/form/state.py b/src/gui/tags/panel/form/state.py
new file mode 100644
index 0000000..931e67a
--- /dev/null
+++ b/src/gui/tags/panel/form/state.py
@@ -0,0 +1,58 @@
+from PyQt5 import QtCore
+from typing import Optional
+
+from model.tag import ValidTagForm
+
+class TagFormEdition:
+    def __init__(
+            self,
+            name,
+            name_signal,
+            color,
+            color_signal):
+
+        self._name = name
+        self._color = color
+        self._signal = ValidTagFormSignal()
+
+        name_signal.connect(lambda n: self.on_name_signal(n))
+        color_signal.connect(lambda d: self.on_color_signal(d))
+
+    def get(self) -> Optional[ValidTagForm]:
+        name = self._name.strip()
+        color = self._color.strip()
+
+        if name and color:
+            return ValidTagForm(
+                name = name,
+                color = color)
+        else:
+            return None
+
+    def on_name_signal(self, name: str):
+        self._name = name
+        self.emit()
+
+    def on_color_signal(self, color: str):
+        self._color = color
+        self.emit()
+
+    def emit(self):
+        validForm = self.get()
+        if validForm:
+            self._signal.emit(validForm)
+
+    def signal(self):
+        return self._signal
+
+class ValidTagFormSignal(QtCore.QObject):
+    _signal = QtCore.pyqtSignal(ValidTagForm, name = 'validTagForm')
+
+    def __init__(self):
+        QtCore.QObject.__init__(self)
+
+    def emit(self, form: Optional[ValidTagForm]):
+        self._signal.emit(form)
+
+    def connect(self, f):
+        self._signal.connect(f)
diff --git a/src/gui/tags/panel/form/widget.py b/src/gui/tags/panel/form/widget.py
new file mode 100644
index 0000000..5627e3b
--- /dev/null
+++ b/src/gui/tags/panel/form/widget.py
@@ -0,0 +1,137 @@
+from PyQt5 import QtWidgets, QtCore, QtGui
+from typing import Optional, Tuple, List, Any
+
+from model.tag import Tag, ValidTagForm
+from model import difficulty, priority
+import gui.icon
+import gui.tags.panel.form.state
+import gui.color
+
+def widget(
+        parent: QtWidgets.QWidget,
+        action_title: str,
+        tag: Tag,
+        on_validated,
+        on_cancel):
+
+    widget = QtWidgets.QWidget(parent)
+    layout = QtWidgets.QVBoxLayout(widget)
+    widget.setLayout(layout)
+
+    grid = QtWidgets.QWidget(widget)
+    layout.addWidget(grid)
+    grid_layout = QtWidgets.QGridLayout(grid)
+    grid.setLayout(grid_layout)
+
+    init_name = tag.name if tag is not None else ''
+    name_input = line_edit(grid, grid_layout, 0, 'Name', init_name)
+
+    init_color = tag.color if tag is not None else '#FFFFFF'
+    color_input = color_edit(grid, grid_layout, 1, 'Color', QtGui.QColor(init_color))
+
+    tag_form_edition = gui.tags.panel.form.state.TagFormEdition(
+            init_name,
+            name_input.textChanged,
+            init_color,
+            color_input.textChanged)
+
+    def on_validate():
+        form = tag_form_edition.get()
+        if form:
+            on_validated(form)
+
+    layout.addWidget(buttons(
+            parent = widget,
+            action_title = action_title,
+            tag_form_signal = tag_form_edition.signal(),
+            on_validate = on_validate,
+            on_cancel = on_cancel))
+
+    return widget
+
+def line_edit(
+        parent,
+        layout: QtWidgets.QGridLayout,
+        n: int,
+        label: str,
+        default_value: str) -> QtWidgets.QLineEdit:
+
+    label = QtWidgets.QLabel(label, parent)
+    layout.addWidget(label, n, 0)
+
+    edit = QtWidgets.QLineEdit(parent)
+    if default_value != None:
+        edit.setText(default_value)
+    layout.addWidget(edit, n, 1)
+
+    return edit
+
+def color_edit(
+        parent,
+        layout: QtWidgets.QGridLayout,
+        n: int,
+        label: str,
+        init_color: QtGui.QColor) -> QtWidgets.QLineEdit:
+
+    label = QtWidgets.QLabel(label, parent)
+    layout.addWidget(label, n, 0)
+
+    edit = ColorInput(init_color, parent)
+    layout.addWidget(edit, n, 1)
+
+    return edit
+
+class ColorInput(QtWidgets.QLineEdit):
+
+    def __init__(self, init_color: QtGui.QColor, parent):
+        super().__init__(parent)
+        self.setReadOnly(True)
+        self.installEventFilter(self)
+        self._color = init_color
+        self.update(init_color)
+        self._is_editing = False
+
+    def eventFilter(self, source, event):
+        if source is self and event.type() == QtCore.QEvent.FocusIn:
+            if not self._is_editing:
+                self._is_editing = True
+                color = QtWidgets.QColorDialog.getColor(self._color, self)
+                if color.isValid():
+                    self.update(color)
+            else:
+                self._is_editing = False
+                self.clearFocus()
+        return super(ColorInput, self).eventFilter(source, event)
+
+    def update(self, color: QtGui.QColor):
+        self._color = color
+        self.setText(color.name().upper())
+        palette = QtGui.QPalette()
+        palette.setColor(QtGui.QPalette.Base, color)
+        palette.setColor(QtGui.QPalette.Text, color)
+        self.setPalette(palette)
+
+def buttons(parent, action_title, tag_form_signal, on_validate, on_cancel):
+    widget = QtWidgets.QWidget(parent)
+    layout = QtWidgets.QHBoxLayout(widget)
+
+    validate = QtWidgets.QPushButton(action_title, widget)
+    validate.setDisabled(True)
+    validate.setIcon(gui.icon.dialog_apply(validate.style()))
+    validate.clicked.connect(on_validate);
+    layout.addWidget(validate)
+
+    def on_tag_form_signal(form: Optional[ValidTagForm]):
+        if form:
+            validate.setEnabled(True)
+        else:
+            validate.setDisabled(True)
+
+    tag_form_signal.connect(on_tag_form_signal)
+
+    cancel = QtWidgets.QPushButton('cancel', widget)
+    cancel.setIcon(gui.icon.dialog_cancel(cancel.style()))
+    cancel.clicked.connect(on_cancel)
+    layout.addWidget(cancel)
+
+    return widget
diff --git a/src/gui/tags/panel/signal.py b/src/gui/tags/panel/signal.py
new file mode 100644
index 0000000..9417530
--- /dev/null
+++ b/src/gui/tags/panel/signal.py
@@ -0,0 +1,27 @@
+from PyQt5 import QtCore
+
+from model.tag import Tag
+
+class AddTag(QtCore.QObject):
+    _signal = QtCore.pyqtSignal(Tag, name = 'addTag')
+
+    def __init__(self):
+        QtCore.QObject.__init__(self)
+
+    def emit(self, tag):
+        self._signal.emit(tag)
+
+    def connect(self, f):
+        self._signal.connect(f)
+
+class UpdateTag(QtCore.QObject):
+    _signal = QtCore.pyqtSignal(int, Tag, name = 'updateTag')
+
+    def __init__(self):
+        QtCore.QObject.__init__(self)
+
+    def emit(self, row, tag):
+        self._signal.emit(row, tag)
+
+    def connect(self, f):
+        self._signal.connect(f)
diff --git a/src/gui/tags/panel/table/menu.py b/src/gui/tags/panel/table/menu.py
new file mode 100644
index 0000000..f95c097
--- /dev/null
+++ b/src/gui/tags/panel/table/menu.py
@@ -0,0 +1,25 @@
+from PyQt5 import QtWidgets
+
+import db.tags
+import gui.tags.panel.dialog
+from model.tag import Tag, ValidTagForm
+
+def open(table, update_tag_signal, position):
+    rows = set([index.row() for index in table.selectedIndexes()])
+
+    menu = QtWidgets.QMenu(table)
+
+    if len(rows) == 1:
+        modify_action = menu.addAction(gui.icon.dialog_open(menu.style()), 'modify')
+    else:
+        modify_action = QtWidgets.QAction(menu)
+
+    delete_action = menu.addAction(gui.icon.trash(menu.style()), 'delete')
+
+    action = menu.exec_(table.mapToGlobal(position))
+    if action == modify_action and len(rows) == 1:
+        row = list(rows)[0]
+        tag = table.model().get_at(row)
+        gui.tags.panel.dialog.update(table, update_tag_signal, row, tag).exec_()
+    elif action == delete_action:
+        gui.tags.panel.dialog.show_delete(table, rows)
diff --git a/src/gui/tags/panel/table/model.py b/src/gui/tags/panel/table/model.py
new file mode 100644
index 0000000..7c66b5d
--- /dev/null
+++ b/src/gui/tags/panel/table/model.py
@@ -0,0 +1,103 @@
+from PyQt5 import QtCore, QtWidgets, QtGui
+from PyQt5.QtCore import Qt
+
+from model.tag import Tag
+import time
+import math
+import util.array
+import util.range
+import gui.color
+
+columns = 1
+
+headers = ['Name', 'Color']
+
+default_sort = (0, Qt.AscendingOrder)
+
+class TableModel(QtCore.QAbstractTableModel):
+    def __init__(self, tags):
+        super(TableModel, self).__init__()
+        self._tags = tags
+
+    def headerData(self, section, orientation, role):
+        if role == Qt.DisplayRole and orientation == Qt.Horizontal:
+            return headers[section]
+        elif role == Qt.DisplayRole and orientation == Qt.Vertical:
+            return section + 1
+        else:
+            return QtCore.QVariant()
+
+    def data(self, index, role):
+        tag = self._tags[index.row()]
+
+        if role == Qt.DisplayRole:
+            if index.column() == 0:
+                return tag.name
+            elif index.column() == 1:
+                return tag.color
+        elif role == Qt.BackgroundRole:
+            return QtGui.QBrush(QtGui.QColor(tag.color))
+        else:
+            return QtCore.QVariant()
+
+    def rowCount(self, index):
+        return len(self._tags)
+
+    def columnCount(self, index):
+        return columns
+
+    def get_at(self, row):
+        if row >= 0 and row < len(self._tags):
+            return self._tags[row]
+
+    def insert_tag(self, header: QtWidgets.QHeaderView, tag: Tag) -> int:
+        at = self.insert_position(header, tag)
+        self.beginInsertRows(QtCore.QModelIndex(), at, at)
+        self._tags.insert(at, tag)
+        self.endInsertRows()
+        return at
+
+    def insert_position(self, header: QtWidgets.QHeaderView, tag: Tag) -> int:
+        row = header.sortIndicatorSection()
+        order = header.sortIndicatorOrder()
+        is_rev = is_reversed(row, order)
+        return util.array.insert_position(
+                sort_key(tag, row, is_rev),
+                [sort_key(t, row, is_rev) for t in self._tags],
+                is_rev)
+
+    def update_tag(self, header: QtWidgets.QHeaderView, row, tag: Tag) -> int:
+        self.delete_tag_range(row, 1)
+        return self.insert_tag(header, tag)
+
+    def delete_tags(self, indexes):
+        for range in reversed(util.range.from_indexes(indexes)):
+            self.delete_tag_range(range.start, range.length)
+        return True
+
+    def delete_tag_range(self, row, rows):
+        self.beginRemoveRows(QtCore.QModelIndex(), row, row + rows - 1)
+        self._tags = self._tags[:row] + self._tags[row + rows:]
+        self.endRemoveRows()
+        return True
+
+    def row_ids(self, rows):
+        return [tag.id for i, tag in enumerate(self._tags) if i in rows]
+
+    def sort(self, row: int, order: Qt.SortOrder):
+        self.layoutAboutToBeChanged.emit()
+        is_rev = is_reversed(row, order)
+        self._tags = sorted(
+                self._tags,
+                key = lambda tag: sort_key(tag, row, is_rev),
+                reverse = is_rev)
+        self.layoutChanged.emit()
+
+def sort_key(tag: Tag, row: int, is_reversed: bool):
+    if row == 0:
+        return tag.name.lower()
+    elif row == 1:
+        return tag.color
+
+def is_reversed(row: int, order: Qt.SortOrder) -> bool:
+    return order == Qt.DescendingOrder
diff --git a/src/gui/tags/panel/table/widget.py b/src/gui/tags/panel/table/widget.py
new file mode 100644
index 0000000..f0bf82c
--- /dev/null
+++ b/src/gui/tags/panel/table/widget.py
@@ -0,0 +1,70 @@
+from PyQt5 import QtWidgets
+from PyQt5.QtCore import Qt
+
+import db.tags
+import gui.tags.panel.signal
+import gui.tags.panel.table.menu
+import gui.tags.panel.table.model
+import gui.tags.panel.dialog
+from model.tag import Tag, ValidTagForm
+import database
+
+class Widget(QtWidgets.QTableView):
+
+    def __init__(self, parent, add_tag_signal):
+        super().__init__(parent)
+
+        self._update_tag_signal = gui.tags.panel.signal.UpdateTag()
+
+        tags = db.tags.get(database.cursor())
+        table_model = gui.tags.panel.table.model.TableModel(tags)
+
+        self.setModel(table_model)
+        self.sortByColumn(
+            gui.tags.panel.table.model.default_sort[0],
+            gui.tags.panel.table.model.default_sort[1])
+        self.setSortingEnabled(True)
+        self.setSelectionBehavior(QtWidgets.QTableView.SelectRows)
+        self.horizontalHeader().setStretchLastSection(True)
+        self.resizeColumns()
+
+        self.doubleClicked.connect(lambda index: self.on_double_click(index.row()))
+
+        # # Menu
+        self.setContextMenuPolicy(Qt.CustomContextMenu)
+        self.customContextMenuRequested.connect(lambda position: gui.tags.panel.table.menu.open(self, self._update_tag_signal, position))
+
+        add_tag_signal.connect(lambda tag: self.insert(tag))
+        self._update_tag_signal.connect(lambda row, tag: self.update(row, tag))
+
+    def insert(self, tag):
+        self.model().insert_tag(self.horizontalHeader(), tag)
+        self.resizeColumns()
+
+    def update(self, row, tag):
+        row = self.model().update_tag(self.horizontalHeader(), row, tag)
+        self.selectRow(row)
+        self.resizeColumns()
+
+    def resizeColumns(self):
+        for column in range(gui.tags.panel.table.model.columns):
+            self.resizeColumnToContents(column)
+
+    def keyPressEvent(self, event):
+        super().keyPressEvent(event)
+        if event.key() in (Qt.Key_Return, Qt.Key_Enter):
+            rows = self.get_selected_rows()
+            if len(rows) == 1:
+                row = rows[0]
+                tag = self.model().get_at(row)
+                gui.tags.panel.dialog.update(self, self._update_tag_signal, row, tag).exec_()
+        elif event.key() == Qt.Key_Delete:
+            rows = self.get_selected_rows()
+            gui.tags.panel.dialog.show_delete(self, rows)
+
+    def get_selected_rows(self):
+        return list(set([index.row() for index in self.selectedIndexes()]))
+
+    def on_double_click(self, row: int):
+        tag = self.model().get_at(row)
+        gui.tags.panel.dialog.update(self, self._update_tag_signal, row, tag).exec_()
diff --git a/src/gui/tags/panel/widget.py b/src/gui/tags/panel/widget.py
new file mode 100644
index 0000000..3da55c9
--- /dev/null
+++ b/src/gui/tags/panel/widget.py
@@ -0,0 +1,25 @@
+from PyQt5 import QtWidgets
+
+import gui.tags.panel.dialog
+import gui.tags.panel.signal
+import gui.tags.panel.table.widget
+import gui.icon
+
+def widget(parent):
+    widget = QtWidgets.QWidget(parent)
+
+    layout = QtWidgets.QVBoxLayout(widget)
+    widget.setLayout(layout)
+
+    add_tag_signal = gui.tags.panel.signal.AddTag()
+
+    add_tag_button = QtWidgets.QPushButton('Add a tag', widget)
+    add_tag_button.setIcon(gui.icon.new_folder(widget.style()))
+
+    add_tag_button.clicked.connect(lambda: gui.tags.panel.dialog.add(widget, add_tag_signal).exec_())
+    layout.addWidget(add_tag_button)
+
+    table = gui.tags.panel.table.widget.Widget(widget, add_tag_signal)
+    layout.addWidget(table)
+
+    return widget