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/*
TasksViewDelegate.cpp
This file is part of Charm, a task-based time tracking application.
Copyright (C) 2014-2018 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
Author: Frank Osterfeld <frank.osterfeld@kdab.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "TasksViewDelegate.h"
#include "TaskModelAdapter.h"
#include "ViewHelpers.h"
#include <QEvent>
#include <QMouseEvent>
#include <QPainter>
TasksViewDelegate::TasksViewDelegate(QObject *parent)
: QItemDelegate(parent)
{
connect(this, &TasksViewDelegate::closeEditor,
this, &TasksViewDelegate::slotCloseEditor);
}
QWidget *TasksViewDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
QWidget *result = QItemDelegate::createEditor(parent, option, index);
m_editing = true;
emit editingStateChanged();
return result;
}
bool TasksViewDelegate::isEditing() const
{
return m_editing;
}
void TasksViewDelegate::slotCloseEditor(QWidget *, QAbstractItemDelegate::EndEditHint)
{
m_editing = false;
emit editingStateChanged();
}
void TasksViewDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
painter->save();
// Nasty QTreeView clips the painting to the editor geometry!
// We don't want that....
painter->setClipRect(option.rect);
drawBackground(painter, option, index);
const QVariant checkStateVariant = index.data(Qt::CheckStateRole);
const Qt::CheckState checkState = static_cast<Qt::CheckState>(checkStateVariant.toInt());
Layout layout = doLayout(option, index);
const QRect textRect(option.rect.left(),
option.rect.top(),
option.rect.width() - layout.cbRect.width(),
layout.height);
// Prepare QStyleOptionViewItem with the wanted alignments
QStyleOptionViewItem modifiedOption = option;
modifiedOption.displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
modifiedOption.decorationAlignment = Qt::AlignLeft | Qt::AlignVCenter;
// Draw text (task id+name)
const QString taskName = index.data(Qt::DisplayRole).toString();
QString elidedTask = Charm::elidedTaskName(taskName, painter->font(),
textRect.width());
drawDisplay(painter, modifiedOption, textRect, elidedTask);
// Draw checkbox
drawCheck(painter, option, layout.cbRect, checkState);
painter->restore();
}
QSize TasksViewDelegate::sizeHint(const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
Layout layout = doLayout(option, index);
return QSize(option.rect.width(), layout.height);
}
bool TasksViewDelegate::editorEvent(QEvent *event, QAbstractItemModel *model,
const QStyleOptionViewItem &option, const QModelIndex &index)
{
Q_ASSERT(event);
Q_ASSERT(model);
// make sure that the item is checkable
Qt::ItemFlags flags = model->flags(index);
if (!(flags &Qt::ItemIsUserCheckable) || !(option.state & QStyle::State_Enabled)
|| !(flags & Qt::ItemIsEnabled))
return false;
// make sure that we have a check state
QVariant value = index.data(Qt::CheckStateRole);
if (!value.isValid())
return false;
// make sure that we have the right event type
if ((event->type() == QEvent::MouseButtonRelease)
|| (event->type() == QEvent::MouseButtonDblClick)) {
const QRect checkRect = checkBoxRect(option, Qt::Checked);
QMouseEvent *me = static_cast<QMouseEvent *>(event);
if (me->button() != Qt::LeftButton || !checkRect.contains(me->pos()))
return false;
// eat the double click events inside the check rect
if (event->type() == QEvent::MouseButtonDblClick)
return true;
} else if (event->type() == QEvent::KeyPress) {
if (static_cast<QKeyEvent *>(event)->key() != Qt::Key_Space
&& static_cast<QKeyEvent *>(event)->key() != Qt::Key_Select)
return false;
} else {
return false;
}
Qt::CheckState state = (static_cast<Qt::CheckState>(value.toInt()) == Qt::Checked
? Qt::Unchecked : Qt::Checked);
return model->setData(index, state, Qt::CheckStateRole);
}
QRect TasksViewDelegate::checkBoxRect(const QStyleOptionViewItem &option,
const QVariant &variant) const
{
const QRect bounding = option.rect; // TODO adjust if recording
const QRect cbRect = doCheck(option, bounding, variant);
// Position checkbox on the right, and vertically aligned
return QStyle::alignedRect(option.direction, Qt::AlignRight | Qt::AlignVCenter,
cbRect.size(), bounding);
}
void TasksViewDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
// TODO use doLayout
const QRect cbRect = checkBoxRect(option, Qt::Checked);
int firstLineHeight = qMax(cbRect.height(), option.fontMetrics.height());
const QVariant decorationVariant = index.data(Qt::DecorationRole);
const QPixmap decorationPixmap = decoration(option, decorationVariant);
const QString runningTime = index.data(TasksViewRole_RunningTime).toString();
const int left = decorationPixmap.width() + option.fontMetrics.width(runningTime);
QRect r = option.rect.translated(left + 5, 0);
r.setRight(cbRect.left());
r.setTop(r.top() + firstLineHeight);
editor->setGeometry(r);
}
void TasksViewDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
// Do not reset the comment lineedit to empty every time TaskModelAdapter emits
// dataChanged (because of the running time being updated).
if (m_editing)
return;
QItemDelegate::setEditorData(editor, index);
}
TasksViewDelegate::Layout TasksViewDelegate::doLayout(const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
Layout layout;
// Find size of checkbox
const QVariant checkStateVariant = index.data(Qt::CheckStateRole);
layout.cbRect = checkBoxRect(option, checkStateVariant);
layout.height = qMax(layout.cbRect.height(), option.fontMetrics.height());
return layout;
}
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