diff options
Diffstat (limited to 'tests/manual/examples/widgets/itemviews/chart')
9 files changed, 845 insertions, 0 deletions
diff --git a/tests/manual/examples/widgets/itemviews/chart/CMakeLists.txt b/tests/manual/examples/widgets/itemviews/chart/CMakeLists.txt new file mode 100644 index 0000000000..57e52d84fc --- /dev/null +++ b/tests/manual/examples/widgets/itemviews/chart/CMakeLists.txt @@ -0,0 +1,56 @@ +# Copyright (C) 2022 The Qt Company Ltd. +# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +cmake_minimum_required(VERSION 3.16) +project(chart LANGUAGES CXX) + +if(NOT DEFINED INSTALL_EXAMPLESDIR) + set(INSTALL_EXAMPLESDIR "examples") +endif() + +set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/itemviews/chart") + +find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets) + +qt_standard_project_setup() + +qt_add_executable(chart + main.cpp + mainwindow.cpp mainwindow.h + pieview.cpp pieview.h +) + +set_target_properties(chart PROPERTIES + WIN32_EXECUTABLE TRUE + MACOSX_BUNDLE TRUE +) + +target_link_libraries(chart PRIVATE + Qt6::Core + Qt6::Gui + Qt6::Widgets +) + +# Resources: +set(chart_resource_files + "qtdata.cht" +) + +qt_add_resources(chart "chart" + PREFIX + "/Charts" + FILES + ${chart_resource_files} +) + +if(UNIX AND NOT APPLE AND NOT HAIKU AND NOT INTEGRITY AND NOT VXWORKS) + target_link_libraries(chart PRIVATE + m + ) +endif() + +install(TARGETS chart + RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}" + BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}" + LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}" +) diff --git a/tests/manual/examples/widgets/itemviews/chart/chart.pro b/tests/manual/examples/widgets/itemviews/chart/chart.pro new file mode 100644 index 0000000000..323f6202e4 --- /dev/null +++ b/tests/manual/examples/widgets/itemviews/chart/chart.pro @@ -0,0 +1,14 @@ +QT += widgets +requires(qtConfig(filedialog)) + +HEADERS = mainwindow.h \ + pieview.h +RESOURCES = chart.qrc +SOURCES = main.cpp \ + mainwindow.cpp \ + pieview.cpp +unix:!mac:!vxworks:!integrity:!haiku:LIBS += -lm + +# install +target.path = $$[QT_INSTALL_EXAMPLES]/widgets/itemviews/chart +INSTALLS += target diff --git a/tests/manual/examples/widgets/itemviews/chart/chart.qrc b/tests/manual/examples/widgets/itemviews/chart/chart.qrc new file mode 100644 index 0000000000..7401d4d2f8 --- /dev/null +++ b/tests/manual/examples/widgets/itemviews/chart/chart.qrc @@ -0,0 +1,5 @@ +<!DOCTYPE RCC><RCC version="1.0"> +<qresource prefix="/Charts" > + <file>qtdata.cht</file> +</qresource> +</RCC> diff --git a/tests/manual/examples/widgets/itemviews/chart/main.cpp b/tests/manual/examples/widgets/itemviews/chart/main.cpp new file mode 100644 index 0000000000..7d7cf3e573 --- /dev/null +++ b/tests/manual/examples/widgets/itemviews/chart/main.cpp @@ -0,0 +1,14 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include <QApplication> + +#include "mainwindow.h" + +int main(int argc, char *argv[]) +{ + QApplication app(argc, argv); + MainWindow window; + window.show(); + return app.exec(); +} diff --git a/tests/manual/examples/widgets/itemviews/chart/mainwindow.cpp b/tests/manual/examples/widgets/itemviews/chart/mainwindow.cpp new file mode 100644 index 0000000000..450f2e3a56 --- /dev/null +++ b/tests/manual/examples/widgets/itemviews/chart/mainwindow.cpp @@ -0,0 +1,136 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include "pieview.h" +#include "mainwindow.h" + +#include <QtWidgets> + +MainWindow::MainWindow(QWidget *parent) + : QMainWindow(parent) +{ + QMenu *fileMenu = new QMenu(tr("&File"), this); + QAction *openAction = fileMenu->addAction(tr("&Open...")); + openAction->setShortcuts(QKeySequence::Open); + QAction *saveAction = fileMenu->addAction(tr("&Save As...")); + saveAction->setShortcuts(QKeySequence::SaveAs); + QAction *quitAction = fileMenu->addAction(tr("E&xit")); + quitAction->setShortcuts(QKeySequence::Quit); + + setupModel(); + setupViews(); + + connect(openAction, &QAction::triggered, this, &MainWindow::openFile); + connect(saveAction, &QAction::triggered, this, &MainWindow::saveFile); + connect(quitAction, &QAction::triggered, qApp, &QCoreApplication::quit); + + menuBar()->addMenu(fileMenu); + statusBar(); + + loadFile(":/Charts/qtdata.cht"); + + setWindowTitle(tr("Chart")); + resize(870, 550); +} + +void MainWindow::setupModel() +{ + model = new QStandardItemModel(8, 2, this); + model->setHeaderData(0, Qt::Horizontal, tr("Label")); + model->setHeaderData(1, Qt::Horizontal, tr("Quantity")); +} + +void MainWindow::setupViews() +{ + QSplitter *splitter = new QSplitter; + QTableView *table = new QTableView; + pieChart = new PieView; + splitter->addWidget(table); + splitter->addWidget(pieChart); + splitter->setStretchFactor(0, 0); + splitter->setStretchFactor(1, 1); + + table->setModel(model); + pieChart->setModel(model); + + QItemSelectionModel *selectionModel = new QItemSelectionModel(model); + table->setSelectionModel(selectionModel); + pieChart->setSelectionModel(selectionModel); + + QHeaderView *headerView = table->horizontalHeader(); + headerView->setStretchLastSection(true); + + setCentralWidget(splitter); +} + +void MainWindow::openFile() +{ + const QString fileName = + QFileDialog::getOpenFileName(this, tr("Choose a data file"), "", "*.cht"); + if (!fileName.isEmpty()) + loadFile(fileName); +} + +void MainWindow::loadFile(const QString &fileName) +{ + QFile file(fileName); + if (!file.open(QFile::ReadOnly | QFile::Text)) + return; + + QTextStream stream(&file); + + model->removeRows(0, model->rowCount(QModelIndex()), QModelIndex()); + + int row = 0; + while (!stream.atEnd()) { + const QString line = stream.readLine(); + if (!line.isEmpty()) { + model->insertRows(row, 1, QModelIndex()); + + const QStringList pieces = line.split(QLatin1Char(','), Qt::SkipEmptyParts); + if (pieces.size() < 3) + continue; + model->setData(model->index(row, 0, QModelIndex()), + pieces.value(0)); + model->setData(model->index(row, 1, QModelIndex()), + pieces.value(1)); + model->setData(model->index(row, 0, QModelIndex()), + QColor(pieces.value(2)), Qt::DecorationRole); + row++; + } + }; + + file.close(); + statusBar()->showMessage(tr("Loaded %1").arg(fileName), 2000); +} + +void MainWindow::saveFile() +{ + QString fileName = QFileDialog::getSaveFileName(this, + tr("Save file as"), "", "*.cht"); + + if (fileName.isEmpty()) + return; + + QFile file(fileName); + if (!file.open(QFile::WriteOnly | QFile::Text)) + return; + + QTextStream stream(&file); + for (int row = 0; row < model->rowCount(QModelIndex()); ++row) { + + QStringList pieces; + + pieces.append(model->data(model->index(row, 0, QModelIndex()), + Qt::DisplayRole).toString()); + pieces.append(model->data(model->index(row, 1, QModelIndex()), + Qt::DisplayRole).toString()); + pieces.append(model->data(model->index(row, 0, QModelIndex()), + Qt::DecorationRole).toString()); + + stream << pieces.join(',') << "\n"; + } + + file.close(); + statusBar()->showMessage(tr("Saved %1").arg(fileName), 2000); +} diff --git a/tests/manual/examples/widgets/itemviews/chart/mainwindow.h b/tests/manual/examples/widgets/itemviews/chart/mainwindow.h new file mode 100644 index 0000000000..f2a639c952 --- /dev/null +++ b/tests/manual/examples/widgets/itemviews/chart/mainwindow.h @@ -0,0 +1,34 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#ifndef MAINWINDOW_H +#define MAINWINDOW_H + +#include <QMainWindow> + +QT_BEGIN_NAMESPACE +class QAbstractItemModel; +class QAbstractItemView; +QT_END_NAMESPACE + +class MainWindow : public QMainWindow +{ + Q_OBJECT + +public: + MainWindow(QWidget *parent = nullptr); + +private slots: + void openFile(); + void saveFile(); + +private: + void setupModel(); + void setupViews(); + void loadFile(const QString &path); + + QAbstractItemModel *model = nullptr; + QAbstractItemView *pieChart = nullptr; +}; + +#endif // MAINWINDOW_H diff --git a/tests/manual/examples/widgets/itemviews/chart/pieview.cpp b/tests/manual/examples/widgets/itemviews/chart/pieview.cpp new file mode 100644 index 0000000000..e681207f38 --- /dev/null +++ b/tests/manual/examples/widgets/itemviews/chart/pieview.cpp @@ -0,0 +1,506 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include "pieview.h" + +#include <QtWidgets> + +PieView::PieView(QWidget *parent) + : QAbstractItemView(parent) +{ + horizontalScrollBar()->setRange(0, 0); + verticalScrollBar()->setRange(0, 0); +} + +void PieView::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, + const QList<int> &roles) +{ + QAbstractItemView::dataChanged(topLeft, bottomRight, roles); + + if (!roles.contains(Qt::DisplayRole)) + return; + + validItems = 0; + totalValue = 0.0; + + for (int row = 0; row < model()->rowCount(rootIndex()); ++row) { + + QModelIndex index = model()->index(row, 1, rootIndex()); + double value = model()->data(index, Qt::DisplayRole).toDouble(); + + if (value > 0.0) { + totalValue += value; + validItems++; + } + } + viewport()->update(); +} + +bool PieView::edit(const QModelIndex &index, EditTrigger trigger, QEvent *event) +{ + if (index.column() == 0) + return QAbstractItemView::edit(index, trigger, event); + else + return false; +} + +/* + Returns the item that covers the coordinate given in the view. +*/ + +QModelIndex PieView::indexAt(const QPoint &point) const +{ + if (validItems == 0) + return QModelIndex(); + + // Transform the view coordinates into contents widget coordinates. + int wx = point.x() + horizontalScrollBar()->value(); + int wy = point.y() + verticalScrollBar()->value(); + + if (wx < totalSize) { + double cx = wx - totalSize / 2; + double cy = totalSize / 2 - wy; // positive cy for items above the center + + // Determine the distance from the center point of the pie chart. + double d = std::sqrt(std::pow(cx, 2) + std::pow(cy, 2)); + + if (d == 0 || d > pieSize / 2) + return QModelIndex(); + + // Determine the angle of the point. + double angle = qRadiansToDegrees(std::atan2(cy, cx)); + if (angle < 0) + angle = 360 + angle; + + // Find the relevant slice of the pie. + double startAngle = 0.0; + + for (int row = 0; row < model()->rowCount(rootIndex()); ++row) { + + QModelIndex index = model()->index(row, 1, rootIndex()); + double value = model()->data(index).toDouble(); + + if (value > 0.0) { + double sliceAngle = 360 * value / totalValue; + + if (angle >= startAngle && angle < (startAngle + sliceAngle)) + return model()->index(row, 1, rootIndex()); + + startAngle += sliceAngle; + } + } + } else { + QStyleOptionViewItem option; + initViewItemOption(&option); + double itemHeight = QFontMetrics(option.font).height(); + int listItem = int((wy - margin) / itemHeight); + int validRow = 0; + + for (int row = 0; row < model()->rowCount(rootIndex()); ++row) { + + QModelIndex index = model()->index(row, 1, rootIndex()); + if (model()->data(index).toDouble() > 0.0) { + + if (listItem == validRow) + return model()->index(row, 0, rootIndex()); + + // Update the list index that corresponds to the next valid row. + ++validRow; + } + } + } + + return QModelIndex(); +} + +bool PieView::isIndexHidden(const QModelIndex & /*index*/) const +{ + return false; +} + +/* + Returns the rectangle of the item at position \a index in the + model. The rectangle is in contents coordinates. +*/ + +QRect PieView::itemRect(const QModelIndex &index) const +{ + if (!index.isValid()) + return QRect(); + + // Check whether the index's row is in the list of rows represented + // by slices. + QModelIndex valueIndex; + + if (index.column() != 1) + valueIndex = model()->index(index.row(), 1, rootIndex()); + else + valueIndex = index; + + if (model()->data(valueIndex).toDouble() <= 0.0) + return QRect(); + + int listItem = 0; + for (int row = index.row()-1; row >= 0; --row) { + if (model()->data(model()->index(row, 1, rootIndex())).toDouble() > 0.0) + listItem++; + } + + switch (index.column()) { + case 0: { + QStyleOptionViewItem option; + initViewItemOption(&option); + const qreal itemHeight = QFontMetricsF(option.font).height(); + return QRect(totalSize, + qRound(margin + listItem * itemHeight), + totalSize - margin, qRound(itemHeight)); + } + case 1: + return viewport()->rect(); + } + return QRect(); +} + +QRegion PieView::itemRegion(const QModelIndex &index) const +{ + if (!index.isValid()) + return QRegion(); + + if (index.column() != 1) + return itemRect(index); + + if (model()->data(index).toDouble() <= 0.0) + return QRegion(); + + double startAngle = 0.0; + for (int row = 0; row < model()->rowCount(rootIndex()); ++row) { + + QModelIndex sliceIndex = model()->index(row, 1, rootIndex()); + double value = model()->data(sliceIndex).toDouble(); + + if (value > 0.0) { + double angle = 360 * value / totalValue; + + if (sliceIndex == index) { + QPainterPath slicePath; + slicePath.moveTo(totalSize / 2, totalSize / 2); + slicePath.arcTo(margin, margin, margin + pieSize, margin + pieSize, + startAngle, angle); + slicePath.closeSubpath(); + + return QRegion(slicePath.toFillPolygon().toPolygon()); + } + + startAngle += angle; + } + } + + return QRegion(); +} + +int PieView::horizontalOffset() const +{ + return horizontalScrollBar()->value(); +} + +void PieView::mousePressEvent(QMouseEvent *event) +{ + QAbstractItemView::mousePressEvent(event); + origin = event->position().toPoint(); + if (!rubberBand) + rubberBand = new QRubberBand(QRubberBand::Rectangle, viewport()); + rubberBand->setGeometry(QRect(origin, QSize())); + rubberBand->show(); +} + +void PieView::mouseMoveEvent(QMouseEvent *event) +{ + if (rubberBand) + rubberBand->setGeometry(QRect(origin, event->position().toPoint()).normalized()); + QAbstractItemView::mouseMoveEvent(event); +} + +void PieView::mouseReleaseEvent(QMouseEvent *event) +{ + QAbstractItemView::mouseReleaseEvent(event); + if (rubberBand) + rubberBand->hide(); + viewport()->update(); +} + +QModelIndex PieView::moveCursor(QAbstractItemView::CursorAction cursorAction, + Qt::KeyboardModifiers /*modifiers*/) +{ + QModelIndex current = currentIndex(); + + switch (cursorAction) { + case MoveLeft: + case MoveUp: + if (current.row() > 0) + current = model()->index(current.row() - 1, current.column(), + rootIndex()); + else + current = model()->index(0, current.column(), rootIndex()); + break; + case MoveRight: + case MoveDown: + if (current.row() < rows(current) - 1) + current = model()->index(current.row() + 1, current.column(), + rootIndex()); + else + current = model()->index(rows(current) - 1, current.column(), + rootIndex()); + break; + default: + break; + } + + viewport()->update(); + return current; +} + +void PieView::paintEvent(QPaintEvent *event) +{ + QItemSelectionModel *selections = selectionModel(); + QStyleOptionViewItem option; + initViewItemOption(&option); + + QBrush background = option.palette.base(); + QPen foreground(option.palette.color(QPalette::WindowText)); + + QPainter painter(viewport()); + painter.setRenderHint(QPainter::Antialiasing); + + painter.fillRect(event->rect(), background); + painter.setPen(foreground); + + // Viewport rectangles + QRect pieRect = QRect(margin, margin, pieSize, pieSize); + + if (validItems <= 0) + return; + + painter.save(); + painter.translate(pieRect.x() - horizontalScrollBar()->value(), + pieRect.y() - verticalScrollBar()->value()); + painter.drawEllipse(0, 0, pieSize, pieSize); + double startAngle = 0.0; + int row; + + for (row = 0; row < model()->rowCount(rootIndex()); ++row) { + QModelIndex index = model()->index(row, 1, rootIndex()); + double value = model()->data(index).toDouble(); + + if (value > 0.0) { + double angle = 360 * value / totalValue; + + QModelIndex colorIndex = model()->index(row, 0, rootIndex()); + QColor color = QColor(model()->data(colorIndex, Qt::DecorationRole).toString()); + + if (currentIndex() == index) + painter.setBrush(QBrush(color, Qt::Dense4Pattern)); + else if (selections->isSelected(index)) + painter.setBrush(QBrush(color, Qt::Dense3Pattern)); + else + painter.setBrush(QBrush(color)); + + painter.drawPie(0, 0, pieSize, pieSize, int(startAngle*16), int(angle*16)); + + startAngle += angle; + } + } + painter.restore(); + + for (row = 0; row < model()->rowCount(rootIndex()); ++row) { + QModelIndex index = model()->index(row, 1, rootIndex()); + double value = model()->data(index).toDouble(); + + if (value > 0.0) { + QModelIndex labelIndex = model()->index(row, 0, rootIndex()); + + QStyleOptionViewItem option; + initViewItemOption(&option); + + option.rect = visualRect(labelIndex); + if (selections->isSelected(labelIndex)) + option.state |= QStyle::State_Selected; + if (currentIndex() == labelIndex) + option.state |= QStyle::State_HasFocus; + itemDelegate()->paint(&painter, option, labelIndex); + } + } +} + +void PieView::resizeEvent(QResizeEvent * /* event */) +{ + updateGeometries(); +} + +int PieView::rows(const QModelIndex &index) const +{ + return model()->rowCount(model()->parent(index)); +} + +void PieView::rowsInserted(const QModelIndex &parent, int start, int end) +{ + for (int row = start; row <= end; ++row) { + QModelIndex index = model()->index(row, 1, rootIndex()); + double value = model()->data(index).toDouble(); + + if (value > 0.0) { + totalValue += value; + ++validItems; + } + } + + QAbstractItemView::rowsInserted(parent, start, end); +} + +void PieView::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) +{ + for (int row = start; row <= end; ++row) { + QModelIndex index = model()->index(row, 1, rootIndex()); + double value = model()->data(index).toDouble(); + if (value > 0.0) { + totalValue -= value; + --validItems; + } + } + + QAbstractItemView::rowsAboutToBeRemoved(parent, start, end); +} + +void PieView::scrollContentsBy(int dx, int dy) +{ + viewport()->scroll(dx, dy); +} + +void PieView::scrollTo(const QModelIndex &index, ScrollHint) +{ + QRect area = viewport()->rect(); + QRect rect = visualRect(index); + + if (rect.left() < area.left()) { + horizontalScrollBar()->setValue( + horizontalScrollBar()->value() + rect.left() - area.left()); + } else if (rect.right() > area.right()) { + horizontalScrollBar()->setValue( + horizontalScrollBar()->value() + qMin( + rect.right() - area.right(), rect.left() - area.left())); + } + + if (rect.top() < area.top()) { + verticalScrollBar()->setValue( + verticalScrollBar()->value() + rect.top() - area.top()); + } else if (rect.bottom() > area.bottom()) { + verticalScrollBar()->setValue( + verticalScrollBar()->value() + qMin( + rect.bottom() - area.bottom(), rect.top() - area.top())); + } + + update(); +} + +/* + Find the indices corresponding to the extent of the selection. +*/ + +void PieView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command) +{ + // Use content widget coordinates because we will use the itemRegion() + // function to check for intersections. + + QRect contentsRect = rect.translated( + horizontalScrollBar()->value(), + verticalScrollBar()->value()).normalized(); + + int rows = model()->rowCount(rootIndex()); + int columns = model()->columnCount(rootIndex()); + QModelIndexList indexes; + + for (int row = 0; row < rows; ++row) { + for (int column = 0; column < columns; ++column) { + QModelIndex index = model()->index(row, column, rootIndex()); + QRegion region = itemRegion(index); + if (region.intersects(contentsRect)) + indexes.append(index); + } + } + + if (indexes.size() > 0) { + int firstRow = indexes.at(0).row(); + int lastRow = firstRow; + int firstColumn = indexes.at(0).column(); + int lastColumn = firstColumn; + + for (int i = 1; i < indexes.size(); ++i) { + firstRow = qMin(firstRow, indexes.at(i).row()); + lastRow = qMax(lastRow, indexes.at(i).row()); + firstColumn = qMin(firstColumn, indexes.at(i).column()); + lastColumn = qMax(lastColumn, indexes.at(i).column()); + } + + QItemSelection selection( + model()->index(firstRow, firstColumn, rootIndex()), + model()->index(lastRow, lastColumn, rootIndex())); + selectionModel()->select(selection, command); + } else { + QModelIndex noIndex; + QItemSelection selection(noIndex, noIndex); + selectionModel()->select(selection, command); + } + + update(); +} + +void PieView::updateGeometries() +{ + horizontalScrollBar()->setPageStep(viewport()->width()); + horizontalScrollBar()->setRange(0, qMax(0, 2 * totalSize - viewport()->width())); + verticalScrollBar()->setPageStep(viewport()->height()); + verticalScrollBar()->setRange(0, qMax(0, totalSize - viewport()->height())); +} + +int PieView::verticalOffset() const +{ + return verticalScrollBar()->value(); +} + +/* + Returns the position of the item in viewport coordinates. +*/ + +QRect PieView::visualRect(const QModelIndex &index) const +{ + QRect rect = itemRect(index); + if (!rect.isValid()) + return rect; + + return QRect(rect.left() - horizontalScrollBar()->value(), + rect.top() - verticalScrollBar()->value(), + rect.width(), rect.height()); +} + +/* + Returns a region corresponding to the selection in viewport coordinates. +*/ + +QRegion PieView::visualRegionForSelection(const QItemSelection &selection) const +{ + int ranges = selection.count(); + + if (ranges == 0) + return QRect(); + + QRegion region; + for (int i = 0; i < ranges; ++i) { + const QItemSelectionRange &range = selection.at(i); + for (int row = range.top(); row <= range.bottom(); ++row) { + for (int col = range.left(); col <= range.right(); ++col) { + QModelIndex index = model()->index(row, col, rootIndex()); + region += visualRect(index); + } + } + } + return region; +} diff --git a/tests/manual/examples/widgets/itemviews/chart/pieview.h b/tests/manual/examples/widgets/itemviews/chart/pieview.h new file mode 100644 index 0000000000..19c4a18ed0 --- /dev/null +++ b/tests/manual/examples/widgets/itemviews/chart/pieview.h @@ -0,0 +1,66 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#ifndef PIEVIEW_H +#define PIEVIEW_H + +#include <QAbstractItemView> + +//! [0] +class PieView : public QAbstractItemView +{ + Q_OBJECT + +public: + PieView(QWidget *parent = nullptr); + + QRect visualRect(const QModelIndex &index) const override; + void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible) override; + QModelIndex indexAt(const QPoint &point) const override; + +protected slots: + void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, + const QList<int> &roles = QList<int>()) override; + void rowsInserted(const QModelIndex &parent, int start, int end) override; + void rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) override; + +protected: + bool edit(const QModelIndex &index, EditTrigger trigger, QEvent *event) override; + QModelIndex moveCursor(QAbstractItemView::CursorAction cursorAction, + Qt::KeyboardModifiers modifiers) override; + + int horizontalOffset() const override; + int verticalOffset() const override; + + bool isIndexHidden(const QModelIndex &index) const override; + + void setSelection(const QRect&, QItemSelectionModel::SelectionFlags command) override; + + void mousePressEvent(QMouseEvent *event) override; + + void mouseMoveEvent(QMouseEvent *event) override; + void mouseReleaseEvent(QMouseEvent *event) override; + + void paintEvent(QPaintEvent *event) override; + void resizeEvent(QResizeEvent *event) override; + void scrollContentsBy(int dx, int dy) override; + + QRegion visualRegionForSelection(const QItemSelection &selection) const override; + +private: + QRect itemRect(const QModelIndex &item) const; + QRegion itemRegion(const QModelIndex &index) const; + int rows(const QModelIndex &index = QModelIndex()) const; + void updateGeometries() override; + + int margin = 0; + int totalSize = 300; + int pieSize = totalSize - 2 * margin; + int validItems = 0; + double totalValue = 0.0; + QRubberBand *rubberBand = nullptr; + QPoint origin; +}; +//! [0] + +#endif // PIEVIEW_H diff --git a/tests/manual/examples/widgets/itemviews/chart/qtdata.cht b/tests/manual/examples/widgets/itemviews/chart/qtdata.cht new file mode 100644 index 0000000000..6386246c4b --- /dev/null +++ b/tests/manual/examples/widgets/itemviews/chart/qtdata.cht @@ -0,0 +1,14 @@ +Scientific Research,21,#99e600 +Engineering & Design,18,#99cc00 +Automotive,14,#99b300 +Aerospace,13,#9f991a +Automation & Machine Tools,13,#a48033 +Medical & Bioinformatics,13,#a9664d +Imaging & Special Effects,12,#ae4d66 +Defense,11,#b33380 +Test & Measurement Systems,9,#a64086 +Oil & Gas,9,#994d8d +Entertainment & Broadcasting,7,#8d5a93 +Financial,6,#806699 +Consumer Electronics,4,#8073a6 +Other,38,#8080b3 |