Swiftdiff options
| author | Tobias Markmann <tm@ayena.de> | 2018-05-04 11:00:18 (GMT) |
|---|---|---|
| committer | Tobias Markmann <tm@ayena.de> | 2018-05-04 11:00:18 (GMT) |
| commit | 19eefe66821d26a00d24fbe44aa870309d80ad4b (patch) | |
| tree | 8ccac3836a98f45bd5e176d58a3a3c38b035653a /Swift/QtUI/QtExpandedListView.cpp | |
| parent | 202c114d6b1daa1ea1d4693c434bd8daabd41ad1 (diff) | |
| download | swift-19eefe66821d26a00d24fbe44aa870309d80ad4b.zip swift-19eefe66821d26a00d24fbe44aa870309d80ad4b.tar.bz2 | |
Use dedicated QtExpandedListView in new roster UI
QtExpandedListView is always high enough to show all entries
in the model. It also correctly hands off scrolling events
to the parent widget for smooth scrolling.
Test-Information:
Tested on macOS 10.13.4 with a well sized roster, that sizing
and scrolling works as expected. Tested with Qt 5.5.1.
Change-Id: I6d93db3045e1c2f343b89c0d45874d8f85a20c0a
Diffstat (limited to 'Swift/QtUI/QtExpandedListView.cpp')
| -rw-r--r-- | Swift/QtUI/QtExpandedListView.cpp | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/Swift/QtUI/QtExpandedListView.cpp b/Swift/QtUI/QtExpandedListView.cpp new file mode 100644 index 0000000..8cbfab6 --- /dev/null +++ b/Swift/QtUI/QtExpandedListView.cpp @@ -0,0 +1,109 @@ +/* + * Copyright (c) 2018 Isode Limited. + * All rights reserved. + * See the COPYING file for more information. + */ + +#include <Swift/QtUI/QtExpandedListView.h> + +#include <QWheelEvent> +#include <QScrollArea> + +namespace Swift { + +QtExpandedListView::QtExpandedListView(QWidget* parent) : QListView(parent) { + // Disable macOS focus rectangle due to bad performance. + setAttribute(Qt::WA_MacShowFocusRect, 0); + setSizePolicy(sizePolicy().horizontalPolicy(), QSizePolicy::Fixed); +} + +void QtExpandedListView::setModel(QAbstractItemModel* newModel) { + if (model()) { + disconnectFromModel(model()); + } + if (newModel) { + connectToModel(newModel); + } + QListView::setModel(newModel); + adjustHeightToModelChange(); +} + +QtExpandedListView::~QtExpandedListView() { + if (model()) { + disconnectFromModel(model()); + } +} + +bool QtExpandedListView::viewportEvent(QEvent* event) { + // Ignore wheel events for faster mouse scrolling. + if (event && event->type() == QEvent::Wheel) { + return false; + } + + return QListView::viewportEvent(event); +} + +template <typename T> +T getParentOfType(QWidget* start) { + auto parentW = start->parentWidget(); + if (parentW == nullptr) { + return nullptr; + } + T result = dynamic_cast<T>(parentW); + if (result) { + return result; + } + return getParentOfType<T>(parentW); +} + +void QtExpandedListView::currentChanged(const QModelIndex ¤t, const QModelIndex &) { + // Make sure that the current selected index is visible in the parent QScrollArea. + auto scrollArea = getParentOfType<QScrollArea*>(parentWidget()); + if (scrollArea) { + QList<QPoint> points; + auto visRect = visualRect(current); + points << pos() + visRect.topLeft(); + points << pos() + visRect.topRight(); + points << pos() + visRect.bottomLeft(); + points << pos() + visRect.bottomRight(); + + for (auto&& point : points) { + scrollArea->ensureVisible(point.x(), point.y(), 0, 0); + } + } +} + +void QtExpandedListView::adjustHeightToModelChange() { + updateGeometry(); +} + +QSize QtExpandedListView::minimumSizeHint() const { + auto sh = sizeHint(); + return QSize(0, sh.height()); +} + +QSize QtExpandedListView::sizeHint() const { + auto listViewSH = QListView::sizeHint(); + if (model()) { + auto lastRect = rectForIndex(model()->index(model()->rowCount()-1, 0, rootIndex())); + auto idealHeight = lastRect.y() + lastRect.height() + frameWidth() * 2; + listViewSH.setHeight(idealHeight); + } + return listViewSH; +} + +void QtExpandedListView::connectToModel(QAbstractItemModel* model) { + connect(model, &QAbstractItemModel::dataChanged, this, &QtExpandedListView::adjustHeightToModelChange); + connect(model, &QAbstractItemModel::modelReset, this, &QtExpandedListView::adjustHeightToModelChange); + connect(model, &QAbstractItemModel::rowsInserted, this, &QtExpandedListView::adjustHeightToModelChange); + connect(model, &QAbstractItemModel::rowsRemoved, this, &QtExpandedListView::adjustHeightToModelChange); +} + +void QtExpandedListView::disconnectFromModel(QAbstractItemModel* model) { + disconnect(model, &QAbstractItemModel::dataChanged, this, &QtExpandedListView::adjustHeightToModelChange); + disconnect(model, &QAbstractItemModel::modelReset, this, &QtExpandedListView::adjustHeightToModelChange); + disconnect(model, &QAbstractItemModel::rowsInserted, this, &QtExpandedListView::adjustHeightToModelChange); + disconnect(model, &QAbstractItemModel::rowsRemoved, this, &QtExpandedListView::adjustHeightToModelChange); +} + +} |