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/* Copyright 2013-2018 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <QHeaderView>
#include <QApplication>
#include <QMouseEvent>
#include <QDrag>
#include <QPainter>
#include "VersionListView.h"
#include "Common.h"
VersionListView::VersionListView(QWidget *parent)
:QTreeView ( parent )
{
m_emptyString = tr("No versions are currently available.");
}
void VersionListView::rowsInserted(const QModelIndex &parent, int start, int end)
{
if(!m_itemCount)
viewport()->update();
m_itemCount += end-start+1;
QTreeView::rowsInserted(parent, start, end);
}
void VersionListView::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end)
{
m_itemCount -= end-start+1;
if(!m_itemCount)
viewport()->update();
QTreeView::rowsInserted(parent, start, end);
}
void VersionListView::setModel(QAbstractItemModel *model)
{
m_itemCount = model->rowCount();
if(!m_itemCount)
viewport()->update();
QTreeView::setModel(model);
}
void VersionListView::reset()
{
if(model())
{
m_itemCount = model()->rowCount();
}
viewport()->update();
QTreeView::reset();
}
void VersionListView::setEmptyString(QString emptyString)
{
m_emptyString = emptyString;
updateEmptyViewPort();
}
void VersionListView::setEmptyErrorString(QString emptyErrorString)
{
m_emptyErrorString = emptyErrorString;
updateEmptyViewPort();
}
void VersionListView::setEmptyMode(VersionListView::EmptyMode mode)
{
m_emptyMode = mode;
updateEmptyViewPort();
}
void VersionListView::updateEmptyViewPort()
{
if(!m_itemCount)
{
viewport()->update();
}
}
void VersionListView::paintEvent(QPaintEvent *event)
{
if(m_itemCount)
{
QTreeView::paintEvent(event);
}
else
{
paintInfoLabel(event);
}
}
void VersionListView::paintInfoLabel(QPaintEvent *event)
{
QString emptyString;
switch(m_emptyMode)
{
case VersionListView::Empty:
return;
case VersionListView::String:
emptyString = m_emptyString;
break;
case VersionListView::ErrorString:
emptyString = m_emptyErrorString;
break;
}
//calculate the rect for the overlay
QPainter painter(viewport());
painter.setRenderHint(QPainter::Antialiasing, true);
QFont font("sans", 20);
font.setBold(true);
QRect bounds = viewport()->geometry();
bounds.moveTop(0);
QTextLayout layout(emptyString, font);
qreal height = 0.0;
qreal widthUsed = 0.0;
QStringList lines = viewItemTextLayout(layout, bounds.width() - 20, height, widthUsed);
QRect rect (0,0, widthUsed, height);
rect.setWidth(rect.width()+20);
rect.setHeight(rect.height()+20);
rect.moveCenter(bounds.center());
//check if we are allowed to draw in our area
if (!event->rect().intersects(rect)) {
return;
}
//draw the letter of the topmost item semitransparent in the middle
QColor background = QApplication::palette().color(QPalette::Foreground);
QColor foreground = QApplication::palette().color(QPalette::Base);
/*
background.setAlpha(128 - scrollFade);
foreground.setAlpha(128 - scrollFade);
*/
painter.setBrush(QBrush(background));
painter.setPen(foreground);
painter.drawRoundedRect(rect, 5.0, 5.0);
foreground.setAlpha(190);
painter.setPen(foreground);
painter.setFont(font);
painter.drawText(rect, Qt::AlignCenter, lines.join("\n"));
}
/*
void ModListView::setModel ( QAbstractItemModel* model )
{
QTreeView::setModel ( model );
auto head = header();
head->setStretchLastSection(false);
// HACK: this is true for the checkbox column of mod lists
auto string = model->headerData(0,head->orientation()).toString();
if(!string.size())
{
head->setSectionResizeMode(0, QHeaderView::ResizeToContents);
head->setSectionResizeMode(1, QHeaderView::Stretch);
for(int i = 2; i < head->count(); i++)
head->setSectionResizeMode(i, QHeaderView::ResizeToContents);
}
else
{
head->setSectionResizeMode(0, QHeaderView::Stretch);
for(int i = 1; i < head->count(); i++)
head->setSectionResizeMode(i, QHeaderView::ResizeToContents);
}
}
*/
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