pollymc/application/groupview/GroupView.h
Petr Mrázek 0bcb24502e GH-2119 Update group view scrollbar when the size of rows doesn't change
Previously, it would only update when you resize the window horizontally
enough to change the number of icons that fit in a row.
2018-01-28 02:04:47 +01:00

149 lines
4.5 KiB
C++

/* Copyright 2013-2017 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.
*/
#pragma once
#include <QListView>
#include <QLineEdit>
#include <QScrollBar>
#include <QCache>
#include "VisualGroup.h"
struct GroupViewRoles
{
enum
{
GroupRole = Qt::UserRole,
ProgressValueRole,
ProgressMaximumRole
};
};
class GroupView : public QAbstractItemView
{
Q_OBJECT
public:
GroupView(QWidget *parent = 0);
~GroupView();
void setModel(QAbstractItemModel *model) override;
/// return geometry rectangle occupied by the specified model item
QRect geometryRect(const QModelIndex &index) const;
/// return visual rectangle occupied by the specified model item
virtual QRect visualRect(const QModelIndex &index) const override;
/// get the model index at the specified visual point
virtual QModelIndex indexAt(const QPoint &point) const override;
QString groupNameAt(const QPoint &point);
void setSelection(const QRect &rect,
const QItemSelectionModel::SelectionFlags commands) override;
virtual int horizontalOffset() const override;
virtual int verticalOffset() const override;
virtual void scrollContentsBy(int dx, int dy) override;
virtual void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible) override;
virtual QModelIndex moveCursor(CursorAction cursorAction,
Qt::KeyboardModifiers modifiers) override;
virtual QRegion visualRegionForSelection(const QItemSelection &selection) const override;
int spacing() const
{
return m_spacing;
};
public slots:
virtual void updateGeometries() override;
protected slots:
virtual void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight,
const QVector<int> &roles) override;
virtual void rowsInserted(const QModelIndex &parent, int start, int end) override;
virtual void rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) override;
void modelReset();
void rowsRemoved();
signals:
void droppedURLs(QList<QUrl> urls);
protected:
virtual bool isIndexHidden(const QModelIndex &index) const override;
void mousePressEvent(QMouseEvent *event) override;
void mouseMoveEvent(QMouseEvent *event) override;
void mouseReleaseEvent(QMouseEvent *event) override;
void mouseDoubleClickEvent(QMouseEvent *event) override;
void paintEvent(QPaintEvent *event) override;
void resizeEvent(QResizeEvent *event) override;
void dragEnterEvent(QDragEnterEvent *event) override;
void dragMoveEvent(QDragMoveEvent *event) override;
void dragLeaveEvent(QDragLeaveEvent *event) override;
void dropEvent(QDropEvent *event) override;
void startDrag(Qt::DropActions supportedActions) override;
void updateScrollbar();
private:
friend struct VisualGroup;
QList<VisualGroup *> m_groups;
// geometry
int m_leftMargin = 5;
int m_rightMargin = 5;
int m_bottomMargin = 5;
int m_categoryMargin = 5;
int m_spacing = 5;
int m_itemWidth = 100;
int m_currentItemsPerRow = -1;
int m_currentCursorColumn= -1;
mutable QCache<int, QRect> geometryCache;
// point where the currently active mouse action started in geometry coordinates
QPoint m_pressedPosition;
QPersistentModelIndex m_pressedIndex;
bool m_pressedAlreadySelected;
VisualGroup *m_pressedCategory;
QItemSelectionModel::SelectionFlag m_ctrlDragSelectionFlag;
QPoint m_lastDragPosition;
VisualGroup *category(const QModelIndex &index) const;
VisualGroup *category(const QString &cat) const;
VisualGroup *categoryAt(const QPoint &pos, VisualGroup::HitResults & result) const;
int itemsPerRow() const
{
return m_currentItemsPerRow;
};
int contentWidth() const;
private: /* methods */
int itemWidth() const;
int calculateItemsPerRow() const;
int verticalScrollToValue(const QModelIndex &index, const QRect &rect,
QListView::ScrollHint hint) const;
QPixmap renderToPixmap(const QModelIndexList &indices, QRect *r) const;
QList<QPair<QRect, QModelIndex>> draggablePaintPairs(const QModelIndexList &indices,
QRect *r) const;
bool isDragEventAccepted(QDropEvent *event);
QPair<VisualGroup *, int> rowDropPos(const QPoint &pos);
QPoint offset() const;
};