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Core: Base GridView on QListView (instead of on QTableView)

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Use QListView with its very capable icon view mode instead of QTableView
in order to layout items in a grid.

This removes the need for the GridProxyModel.
It also leaves the previously self-implemented calculation of columns
count to QListView. Only the ProductGridView still needs to calculate
that.

Change-Id: If6e7f033fc78883930794c1e261aea396ae25190
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
This commit is contained in:
Alessandro Portale
2021-11-24 22:19:46 +01:00
parent 7a0bdccadf
commit 37e118b5ec
6 changed files with 38 additions and 246 deletions
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152
src/plugins/coreplugin/welcomepagehelper.cpp
View File

@@ -78,18 +78,15 @@ SearchBox::SearchBox(QWidget *parent)
}
GridView::GridView(QWidget *parent)
: QTableView(parent)
: QListView(parent)
{
setVerticalScrollMode(ScrollPerPixel);
horizontalHeader()->hide();
horizontalHeader()->setDefaultSectionSize(GridProxyModel::GridItemWidth);
verticalHeader()->hide();
verticalHeader()->setDefaultSectionSize(GridProxyModel::GridItemHeight);
setResizeMode(QListView::Adjust);
setMouseTracking(true); // To enable hover.
setSelectionMode(QAbstractItemView::NoSelection);
setFrameShape(QFrame::NoFrame);
setGridStyle(Qt::NoPen);
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setViewMode(IconMode);
setUniformItemSizes(true);
QPalette pal;
pal.setColor(QPalette::Base, themeColor(Theme::Welcome_BackgroundColor));
@@ -102,129 +99,6 @@ void GridView::leaveEvent(QEvent *)
viewportEvent(&hev); // Seemingly needed to kill the hover paint.
}
void GridProxyModel::setSourceModel(QAbstractItemModel *newModel)
{
if (m_sourceModel == newModel)
return;
if (m_sourceModel)
disconnect(m_sourceModel, nullptr, this, nullptr);
m_sourceModel = newModel;
if (newModel) {
connect(newModel, &QAbstractItemModel::layoutAboutToBeChanged, this, [this] {
emit layoutAboutToBeChanged();
});
connect(newModel, &QAbstractItemModel::layoutChanged, this, [this] {
emit layoutChanged();
});
connect(newModel, &QAbstractItemModel::modelAboutToBeReset, this, [this] {
beginResetModel();
});
connect(newModel, &QAbstractItemModel::modelReset, this, [this] { endResetModel(); });
connect(newModel, &QAbstractItemModel::rowsAboutToBeInserted, this, [this] {
beginResetModel();
});
connect(newModel, &QAbstractItemModel::rowsInserted, this, [this] { endResetModel(); });
connect(newModel, &QAbstractItemModel::rowsAboutToBeRemoved, this, [this] {
beginResetModel();
});
connect(newModel, &QAbstractItemModel::rowsRemoved, this, [this] { endResetModel(); });
connect(newModel,
&QAbstractItemModel::dataChanged,
this,
[this] (const QModelIndex &topLeft,
const QModelIndex &bottomRight,
const QVector<int> &roles) {
emit QAbstractItemModel::dataChanged(mapFromSource(topLeft),
mapFromSource(bottomRight), roles);
});
}
}
QAbstractItemModel *GridProxyModel::sourceModel() const
{
return m_sourceModel;
}
QVariant GridProxyModel::data(const QModelIndex &index, int role) const
{
const OptModelIndex sourceIndex = mapToSource(index);
if (sourceIndex)
return sourceModel()->data(*sourceIndex, role);
return QVariant();
}
Qt::ItemFlags GridProxyModel::flags(const QModelIndex &index) const
{
const OptModelIndex sourceIndex = mapToSource(index);
if (sourceIndex)
return sourceModel()->flags(*sourceIndex);
return Qt::ItemFlags();
}
bool GridProxyModel::hasChildren(const QModelIndex &parent) const
{
const OptModelIndex sourceParent = mapToSource(parent);
if (sourceParent)
return sourceModel()->hasChildren(*sourceParent);
return false;
}
void GridProxyModel::setColumnCount(int columnCount)
{
if (columnCount == m_columnCount)
return;
QTC_ASSERT(columnCount >= 1, columnCount = 1);
m_columnCount = columnCount;
emit layoutChanged();
}
int GridProxyModel::rowCount(const QModelIndex &parent) const
{
if (parent.isValid())
return 0;
int rows = sourceModel()->rowCount(QModelIndex());
return (rows + m_columnCount - 1) / m_columnCount;
}
int GridProxyModel::columnCount(const QModelIndex &parent) const
{
if (parent.isValid())
return 0;
return m_columnCount;
}
QModelIndex GridProxyModel::index(int row, int column, const QModelIndex &) const
{
return createIndex(row, column, nullptr);
}
QModelIndex GridProxyModel::parent(const QModelIndex &) const
{
return QModelIndex();
}
// The items at the lower right of the grid might not correspond to source items, if
// source's row count is not N*columnCount
OptModelIndex GridProxyModel::mapToSource(const QModelIndex &proxyIndex) const
{
if (!proxyIndex.isValid())
return QModelIndex();
int sourceRow = proxyIndex.row() * m_columnCount + proxyIndex.column();
if (sourceRow < sourceModel()->rowCount())
return sourceModel()->index(sourceRow, 0);
return OptModelIndex();
}
QModelIndex GridProxyModel::mapFromSource(const QModelIndex &sourceIndex) const
{
if (!sourceIndex.isValid())
return QModelIndex();
QTC_CHECK(sourceIndex.column() == 0);
int proxyRow = sourceIndex.row() / m_columnCount;
int proxyColumn = sourceIndex.row() % m_columnCount;
return index(proxyRow, proxyColumn, QModelIndex());
}
const QSize ListModel::defaultImageSize(188, 145);
ListModel::ListModel(QObject *parent)
@@ -474,13 +348,13 @@ void ListItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &opti
const int d = 10;
const int x = rc.x() + d;
const int y = rc.y() + d;
const int w = rc.width() - 2 * d - GridProxyModel::GridItemGap;
const int w = rc.width() - 2 * d;
const int h = rc.height() - 2 * d;
const bool hovered = option.state & QStyle::State_MouseOver;
const int tagsBase = GridProxyModel::TagsSeparatorY + 10;
const int shiftY = GridProxyModel::TagsSeparatorY - 20;
const int nameY = GridProxyModel::TagsSeparatorY - 20;
const int tagsBase = TagsSeparatorY + 10;
const int shiftY = TagsSeparatorY - 20;
const int nameY = TagsSeparatorY - 20;
const QRect textRect = QRect(x, y + nameY, w, h);
@@ -576,8 +450,7 @@ void ListItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &opti
// Separator line between text and 'Tags:' section
painter->setPen(lightColor);
painter->drawLine(x, y + GridProxyModel::TagsSeparatorY,
x + w, y + GridProxyModel::TagsSeparatorY);
painter->drawLine(x, y + TagsSeparatorY, x + w, y + TagsSeparatorY);
// The 'Tags:' section
const int tagsHeight = h - tagsBase;
@@ -623,7 +496,7 @@ bool ListItemDelegate::editorEvent(QEvent *event, QAbstractItemModel *model,
if (index.isValid()) {
const QPoint pos = mev->pos();
if (pos.y() > option.rect.y() + GridProxyModel::TagsSeparatorY) {
if (pos.y() > option.rect.y() + TagsSeparatorY) {
//const QStringList tags = idx.data(Tags).toStringList();
for (const auto &it : qAsConst(m_currentTagRects)) {
if (it.second.contains(pos))
@@ -637,6 +510,11 @@ bool ListItemDelegate::editorEvent(QEvent *event, QAbstractItemModel *model,
return QStyledItemDelegate::editorEvent(event, model, option, index);
}
QSize ListItemDelegate::sizeHint(const QStyleOptionViewItem &, const QModelIndex &) const
{
return {GridItemWidth, GridItemHeight};
}
void ListItemDelegate::drawPixmapOverlay(const ListItem *, QPainter *,
const QStyleOptionViewItem &, const QRect &) const
{

37
src/plugins/coreplugin/welcomepagehelper.h
View File

@@ -34,7 +34,7 @@
#include <QPointer>
#include <QSortFilterProxyModel>
#include <QStyledItemDelegate>
#include <QTableView>
#include <QListView>
namespace Utils { class FancyLineEdit; }
@@ -48,7 +48,7 @@ public:
Utils::FancyLineEdit *m_lineEdit = nullptr;
};
class CORE_EXPORT GridView : public QTableView
class CORE_EXPORT GridView : public QListView
{
public:
explicit GridView(QWidget *parent);
@@ -58,33 +58,6 @@ protected:
using OptModelIndex = Utils::optional<QModelIndex>;
class CORE_EXPORT GridProxyModel : public QAbstractItemModel
{
public:
void setSourceModel(QAbstractItemModel *newModel);
QAbstractItemModel *sourceModel() const;
QVariant data(const QModelIndex &index, int role) const final;
Qt::ItemFlags flags(const QModelIndex &index) const final;
bool hasChildren(const QModelIndex &parent) const final;
void setColumnCount(int columnCount);
int rowCount(const QModelIndex &parent) const final;
int columnCount(const QModelIndex &parent) const final;
QModelIndex index(int row, int column, const QModelIndex &) const final;
QModelIndex parent(const QModelIndex &) const final;
OptModelIndex mapToSource(const QModelIndex &proxyIndex) const;
QModelIndex mapFromSource(const QModelIndex &sourceIndex) const;
static constexpr int GridItemWidth = 230;
static constexpr int GridItemHeight = 230;
static constexpr int GridItemGap = 10;
static constexpr int TagsSeparatorY = GridItemHeight - 60;
private:
QAbstractItemModel *m_sourceModel = nullptr;
int m_columnCount = 1;
};
class CORE_EXPORT ListItem
{
public:
@@ -148,12 +121,18 @@ public:
void paint(QPainter *painter, const QStyleOptionViewItem &option,
const QModelIndex &index) const override;
static constexpr int GridItemWidth = 230;
static constexpr int GridItemHeight = 230;
static constexpr int GridItemGap = 10;
static constexpr int TagsSeparatorY = GridItemHeight - 60;
signals:
void tagClicked(const QString &tag);
protected:
bool editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option,
const QModelIndex &index) override;
QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const override;
virtual void drawPixmapOverlay(const ListItem *item, QPainter *painter,
const QStyleOptionViewItem &option,

58
src/plugins/marketplace/productlistmodel.cpp
View File

@@ -66,41 +66,23 @@ class ProductGridView : public Core::GridView
{
public:
ProductGridView(QWidget *parent) : Core::GridView(parent) {}
QSize viewportSizeHint() const override
{
if (!model())
return Core::GridView::viewportSizeHint();
static int gridW = Core::GridProxyModel::GridItemWidth + Core::GridProxyModel::GridItemGap;
static int gridH = Core::GridProxyModel::GridItemHeight + Core::GridProxyModel::GridItemGap;
return QSize(model()->columnCount() * gridW, model()->rowCount() * gridH);
bool hasHeightForWidth() const override
{
return true;
}
void setColumnCount(int columnCount)
int heightForWidth(int width) const override
{
if (columnCount < 1)
columnCount = 1;
auto gridProxyModel = static_cast<Core::GridProxyModel *>(model());
gridProxyModel->setColumnCount(columnCount);
const int columnCount = width / Core::ListItemDelegate::GridItemWidth;
const int rowCount = (model()->rowCount() + columnCount - 1) / columnCount;
return rowCount * Core::ListItemDelegate::GridItemHeight;
}
};
class ProductItemDelegate : public Core::ListItemDelegate
{
public:
QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const override
{
const Core::ListItem *item = index.data(Core::ListModel::ItemRole).value<Core::ListItem *>();
// "empty" items (last row of a section)
if (!item)
return Core::ListItemDelegate::sizeHint(option, index);
return QSize(Core::GridProxyModel::GridItemWidth + Core::GridProxyModel::GridItemGap,
Core::GridProxyModel::GridItemHeight + Core::GridProxyModel::GridItemGap);
}
void clickAction(const Core::ListItem *item) const override
{
QTC_ASSERT(item, return);
@@ -163,9 +145,8 @@ static int priority(const QString &collection)
SectionedProducts::SectionedProducts(QWidget *parent)
: QStackedWidget(parent)
, m_allProductsView(new ProductGridView(this))
, m_allProductsView(new Core::GridView(this))
, m_filteredAllProductsModel(new Core::ListModelFilter(new AllProductsModel(this), this))
, m_gridModel(new Core::GridProxyModel)
, m_productDelegate(new ProductItemDelegate)
{
auto area = new QScrollArea(this);
@@ -182,9 +163,8 @@ SectionedProducts::SectionedProducts(QWidget *parent)
addWidget(area);
m_gridModel->setSourceModel(m_filteredAllProductsModel);
m_allProductsView->setItemDelegate(m_productDelegate);
m_allProductsView->setModel(m_gridModel);
m_allProductsView->setModel(m_filteredAllProductsModel);
addWidget(m_allProductsView);
connect(m_productDelegate, &ProductItemDelegate::tagClicked,
@@ -195,7 +175,6 @@ SectionedProducts::~SectionedProducts()
{
qDeleteAll(m_gridViews);
delete m_productDelegate;
delete m_gridModel;
}
void SectionedProducts::updateCollections()
@@ -328,18 +307,6 @@ void SectionedProducts::queueImageForDownload(const QString &url)
fetchNextImage();
}
void SectionedProducts::setColumnCount(int columns)
{
if (columns < 1)
columns = 1;
m_columnCount = columns;
for (ProductGridView *view : qAsConst(m_gridViews)) {
view->setColumnCount(columns);
view->setFixedSize(view->viewportSizeHint());
}
m_allProductsView->setColumnCount(columns);
}
void SectionedProducts::setSearchString(const QString &searchString)
{
int view = searchString.isEmpty() ? 0 // sectioned view
@@ -401,14 +368,11 @@ void SectionedProducts::addNewSection(const Section &section, const QList<Core::
ProductListModel *productModel = new ProductListModel(this);
productModel->appendItems(items);
auto filteredModel = new Core::ListModelFilter(productModel, this);
Core::GridProxyModel *gridModel = new Core::GridProxyModel;
gridModel->setSourceModel(filteredModel);
auto gridView = new ProductGridView(this);
gridView->setItemDelegate(m_productDelegate);
gridView->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
gridView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
gridView->setModel(gridModel);
gridModel->setColumnCount(m_columnCount);
gridView->setModel(filteredModel);
m_productModels.insert(section, productModel);
const auto it = m_gridViews.insert(section, gridView);
@@ -425,12 +389,10 @@ void SectionedProducts::addNewSection(const Section &section, const QList<Core::
QTC_ASSERT(position <= vbox->count() - 1, position = vbox->count() - 1);
vbox->insertWidget(position, sectionLabel);
vbox->insertWidget(position + 1, gridView);
gridView->setFixedSize(gridView->viewportSizeHint());
// add the items also to the all products model to be able to search correctly
auto allProducts = static_cast<ProductListModel *>(m_filteredAllProductsModel->sourceModel());
allProducts->appendItems(items);
m_allProductsView->setColumnCount(m_columnCount);
}
void SectionedProducts::onTagClicked(const QString &tag)

5
src/plugins/marketplace/productlistmodel.h
View File

@@ -108,10 +108,9 @@ private:
QSet<QString> m_pendingImages;
QMap<QString, QString> m_collectionTitles;
QMap<Section, ProductListModel *> m_productModels;
QMap<Section, ProductGridView *> m_gridViews;
ProductGridView *m_allProductsView = nullptr;
QMap<Section, Core::GridView *> m_gridViews;
Core::GridView *m_allProductsView = nullptr;
Core::ListModelFilter *m_filteredAllProductsModel = nullptr;
Core::GridProxyModel * const m_gridModel;
ProductItemDelegate *m_productDelegate = nullptr;
bool m_isDownloadingImage = false;
int m_columnCount = 1;

12
src/plugins/marketplace/qtmarketplacewelcomepage.cpp
View File

@@ -124,18 +124,6 @@ public:
QWidget::showEvent(event);
}
void resizeEvent(QResizeEvent *ev) final
{
QWidget::resizeEvent(ev);
m_sectionedProducts->setColumnCount(bestColumnCount());
}
int bestColumnCount() const
{
return qMax(1, width() / (Core::GridProxyModel::GridItemWidth
+ Core::GridProxyModel::GridItemGap));
}
void onTagClicked(const QString &tag)
{
QString text = m_searcher->text();

20
src/plugins/qtsupport/gettingstartedwelcomepage.cpp
View File

@@ -293,8 +293,8 @@ public:
// for macOS dark mode
pal.setColor(QPalette::Text, Utils::creatorTheme()->color(Theme::Welcome_TextColor));
exampleSetSelector->setPalette(pal);
exampleSetSelector->setMinimumWidth(GridProxyModel::GridItemWidth);
exampleSetSelector->setMaximumWidth(GridProxyModel::GridItemWidth);
exampleSetSelector->setMinimumWidth(Core::ListItemDelegate::GridItemWidth);
exampleSetSelector->setMaximumWidth(Core::ListItemDelegate::GridItemWidth);
ExampleSetModel *exampleSetModel = m_examplesModel->exampleSetModel();
exampleSetSelector->setModel(exampleSetModel);
exampleSetSelector->setCurrentIndex(exampleSetModel->selectedExampleSet());
@@ -312,10 +312,8 @@ public:
hbox->addSpacing(sideMargin);
vbox->addItem(hbox);
m_gridModel.setSourceModel(filteredModel);
auto gridView = new GridView(this);
gridView->setModel(&m_gridModel);
gridView->setModel(filteredModel);
gridView->setItemDelegate(&m_exampleDelegate);
if (auto sb = gridView->verticalScrollBar())
sb->setSingleStep(25);
@@ -327,17 +325,6 @@ public:
filteredModel, &ExamplesListModelFilter::setSearchString);
}
int bestColumnCount() const
{
return qMax(1, width() / (GridProxyModel::GridItemWidth + GridProxyModel::GridItemGap));
}
void resizeEvent(QResizeEvent *ev) final
{
QWidget::resizeEvent(ev);
m_gridModel.setColumnCount(bestColumnCount());
}
void onTagClicked(const QString &tag)
{
QString text = m_searcher->text();
@@ -348,7 +335,6 @@ public:
ExampleDelegate m_exampleDelegate;
QPointer<ExamplesListModel> m_examplesModel;
QLineEdit *m_searcher;
GridProxyModel m_gridModel;
};
QWidget *ExamplesWelcomePage::createWidget() const