core/objectrepeater: add ObjectRepeater
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@ -29,6 +29,7 @@ qt_add_library(quickshell-core STATIC
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model.cpp
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elapsedtimer.cpp
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desktopentry.cpp
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objectrepeater.cpp
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)
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set_source_files_properties(main.cpp PROPERTIES COMPILE_DEFINITIONS GIT_REVISION="${GIT_REVISION}")
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@ -21,5 +21,6 @@ headers = [
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"model.hpp",
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"elapsedtimer.hpp",
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"desktopentry.hpp",
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"objectrepeater.hpp",
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]
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-----
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@ -0,0 +1,191 @@
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#include "objectrepeater.hpp"
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#include <utility>
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#include <qabstractitemmodel.h>
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#include <qcontainerfwd.h>
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#include <qhash.h>
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#include <qlogging.h>
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#include <qobject.h>
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#include <qqmlcomponent.h>
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#include <qqmlcontext.h>
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#include <qqmlengine.h>
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#include <qqmllist.h>
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#include <qtmetamacros.h>
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#include <qtypes.h>
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#include <qvariant.h>
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QVariant ObjectRepeater::model() const { return this->mModel; }
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void ObjectRepeater::setModel(QVariant model) {
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if (model == this->mModel) return;
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if (this->itemModel != nullptr) {
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QObject::disconnect(this->itemModel, nullptr, this, nullptr);
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}
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this->mModel = std::move(model);
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emit this->modelChanged();
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this->reloadElements();
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}
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void ObjectRepeater::onModelDestroyed() {
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this->mModel.clear();
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this->itemModel = nullptr;
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emit this->modelChanged();
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this->reloadElements();
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}
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QQmlComponent* ObjectRepeater::delegate() const { return this->mDelegate; }
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void ObjectRepeater::setDelegate(QQmlComponent* delegate) {
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if (delegate == this->mDelegate) return;
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if (this->mDelegate != nullptr) {
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QObject::disconnect(this->mDelegate, nullptr, this, nullptr);
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}
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this->mDelegate = delegate;
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if (delegate != nullptr) {
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QObject::connect(
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this->mDelegate,
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&QObject::destroyed,
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this,
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&ObjectRepeater::onDelegateDestroyed
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);
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}
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emit this->delegateChanged();
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this->reloadElements();
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}
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void ObjectRepeater::onDelegateDestroyed() {
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this->mDelegate = nullptr;
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emit this->delegateChanged();
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this->reloadElements();
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}
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void ObjectRepeater::reloadElements() {
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for (auto i = this->valuesList.length() - 1; i >= 0; i--) {
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this->removeComponent(i);
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}
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if (this->mDelegate == nullptr || !this->mModel.isValid()) return;
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if (this->mModel.canConvert<QAbstractItemModel*>()) {
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auto* model = this->mModel.value<QAbstractItemModel*>();
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this->itemModel = model;
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this->insertModelElements(model, 0, model->rowCount() - 1); // -1 is fine
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// clang-format off
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QObject::connect(model, &QObject::destroyed, this, &ObjectRepeater::onModelDestroyed);
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QObject::connect(model, &QAbstractItemModel::rowsInserted, this, &ObjectRepeater::onModelRowsInserted);
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QObject::connect(model, &QAbstractItemModel::rowsAboutToBeRemoved, this, &ObjectRepeater::onModelRowsAboutToBeRemoved);
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QObject::connect(model, &QAbstractItemModel::rowsMoved, this, &ObjectRepeater::onModelRowsMoved);
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QObject::connect(model, &QAbstractItemModel::modelAboutToBeReset, this, &ObjectRepeater::onModelAboutToBeReset);
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// clang-format on
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} else if (this->mModel.canConvert<QQmlListReference>()) {
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auto values = this->mModel.value<QQmlListReference>();
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auto len = values.count();
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for (auto i = 0; i != len; i++) {
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this->insertComponent(i, {{"modelData", QVariant::fromValue(values.at(i))}});
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}
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} else if (this->mModel.canConvert<QVector<QVariant>>()) {
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auto values = this->mModel.value<QVector<QVariant>>();
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for (auto& value: values) {
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this->insertComponent(this->valuesList.length(), {{"modelData", value}});
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}
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} else {
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qCritical() << this
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<< "Cannot create components as the model is not compatible:" << this->mModel;
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}
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}
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void ObjectRepeater::insertModelElements(QAbstractItemModel* model, int first, int last) {
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auto roles = model->roleNames();
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auto roleDataVec = QVector<QModelRoleData>();
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for (auto id: roles.keys()) {
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roleDataVec.push_back(QModelRoleData(id));
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}
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auto values = QModelRoleDataSpan(roleDataVec);
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auto props = QVariantMap();
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for (auto i = first; i != last + 1; i++) {
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auto index = model->index(i, 0);
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model->multiData(index, values);
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for (auto [id, name]: roles.asKeyValueRange()) {
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props.insert(name, *values.dataForRole(id));
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}
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this->insertComponent(i, props);
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props.clear();
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}
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}
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void ObjectRepeater::onModelRowsInserted(const QModelIndex& parent, int first, int last) {
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if (parent != QModelIndex()) return;
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this->insertModelElements(this->itemModel, first, last);
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}
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void ObjectRepeater::onModelRowsAboutToBeRemoved(const QModelIndex& parent, int first, int last) {
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if (parent != QModelIndex()) return;
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for (auto i = last; i != first - 1; i--) {
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this->removeComponent(i);
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}
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}
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void ObjectRepeater::onModelRowsMoved(
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const QModelIndex& sourceParent,
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int sourceStart,
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int sourceEnd,
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const QModelIndex& destParent,
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int destStart
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) {
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auto hasSource = sourceParent != QModelIndex();
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auto hasDest = destParent != QModelIndex();
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if (!hasSource && !hasDest) return;
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if (hasSource) {
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this->onModelRowsAboutToBeRemoved(sourceParent, sourceStart, sourceEnd);
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}
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if (hasDest) {
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this->onModelRowsInserted(destParent, destStart, destStart + (sourceEnd - sourceStart));
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}
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}
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void ObjectRepeater::onModelAboutToBeReset() {
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auto last = static_cast<int>(this->valuesList.length() - 1);
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this->onModelRowsAboutToBeRemoved(QModelIndex(), 0, last); // -1 is fine
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}
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void ObjectRepeater::insertComponent(qsizetype index, const QVariantMap& properties) {
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auto* context = QQmlEngine::contextForObject(this);
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auto* instance = this->mDelegate->createWithInitialProperties(properties, context);
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if (instance == nullptr) {
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qWarning().noquote() << this->mDelegate->errorString();
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qWarning() << this << "failed to create object for model data" << properties;
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} else {
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QQmlEngine::setObjectOwnership(instance, QQmlEngine::CppOwnership);
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instance->setParent(this);
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}
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this->insertObject(instance, index);
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}
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void ObjectRepeater::removeComponent(qsizetype index) {
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auto* instance = this->valuesList.at(index);
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delete instance;
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this->removeAt(index);
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}
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@ -0,0 +1,86 @@
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#pragma once
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#include <qabstractitemmodel.h>
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#include <qobject.h>
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#include <qqmlcomponent.h>
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#include <qqmlintegration.h>
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#include <qtmetamacros.h>
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#include <qtypes.h>
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#include <qvariant.h>
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#include "model.hpp"
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///! A Repeater / for loop / map for non Item derived objects.
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/// The ObjectRepeater creates instances of the provided delegate for every entry in the
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/// given model, similarly to a [Repeater] but for non visual types.
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///
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/// [Repeater]: https://doc.qt.io/qt-6/qml-qtquick-repeater.html
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class ObjectRepeater: public ObjectModel<QObject> {
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Q_OBJECT;
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/// The model providing data to the ObjectRepeater.
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///
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/// Currently accepted model types are QML `list<T>` lists, javascript arrays,
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/// and [QAbstractListModel] derived models, though only one column will be repeated
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/// from the latter.
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///
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/// Note: [ObjectModel] is a [QAbstractListModel] with a single column.
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///
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/// [QAbstractListModel]: https://doc.qt.io/qt-6/qabstractlistmodel.html
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/// [ObjectModel]: ../objectmodel
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Q_PROPERTY(QVariant model READ model WRITE setModel NOTIFY modelChanged);
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/// The delegate component to repeat.
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///
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/// The delegate is given the same properties as in a Repeater, except `index` which
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/// is not currently implemented.
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///
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/// If the model is a `list<T>` or javascript array, a `modelData` property will be
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/// exposed containing the entry from the model. If the model is a [QAbstractListModel],
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/// the roles from the model will be exposed.
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///
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/// Note: [ObjectModel] has a single role named `modelData` for compatibility with normal lists.
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///
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/// [QAbstractListModel]: https://doc.qt.io/qt-6/qabstractlistmodel.html
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/// [ObjectModel]: ../objectmodel
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Q_PROPERTY(QQmlComponent* delegate READ delegate WRITE setDelegate NOTIFY delegateChanged);
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Q_CLASSINFO("DefaultProperty", "delegate");
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QML_ELEMENT;
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public:
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explicit ObjectRepeater(QObject* parent = nullptr): ObjectModel(parent) {}
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[[nodiscard]] QVariant model() const;
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void setModel(QVariant model);
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[[nodiscard]] QQmlComponent* delegate() const;
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void setDelegate(QQmlComponent* delegate);
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signals:
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void modelChanged();
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void delegateChanged();
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private slots:
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void onDelegateDestroyed();
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void onModelDestroyed();
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void onModelRowsInserted(const QModelIndex& parent, int first, int last);
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void onModelRowsAboutToBeRemoved(const QModelIndex& parent, int first, int last);
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void onModelRowsMoved(
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const QModelIndex& sourceParent,
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int sourceStart,
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int sourceEnd,
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const QModelIndex& destParent,
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int destStart
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);
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void onModelAboutToBeReset();
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private:
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void reloadElements();
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void insertModelElements(QAbstractItemModel* model, int first, int last);
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void insertComponent(qsizetype index, const QVariantMap& properties);
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void removeComponent(qsizetype index);
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QVariant mModel;
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QAbstractItemModel* itemModel = nullptr;
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QQmlComponent* mDelegate = nullptr;
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};
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