dela
ab1accc821
Batch of performance and animation work: shared FadeHelper/MotionPrefs primitives, hover animators, shadow pixmap caching, smooth scrolling, seek time bubble, and widespread component repaint reductions.
379 lines
9.2 KiB
C++
379 lines
9.2 KiB
C++
#include "moderncombobox.h"
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#include "../utils/fadehelper.h"
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#include "../utils/popupfade.h"
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#include <QAbstractItemView>
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#include <QApplication>
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#include <QEvent>
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#include <QFontMetrics>
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#include <QFrame>
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#include <QKeyEvent>
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#include <QListWidget>
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#include <QPainter>
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#include <QScrollBar>
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#include <QShortcut>
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#include <QStyleOption>
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#include <QStyleOptionComboBox>
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#include <QStyleOptionViewItem>
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#include <QStylePainter>
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#include <QVBoxLayout>
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namespace {
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constexpr int kArrowWidth = 32;
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constexpr int kModernComboMinItemHeight = 36;
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constexpr auto kPopupEdgeFixMarker = "/* modern-combobox-popup-edge-fix */";
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constexpr auto kPopupEdgeFixQss = R"(
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/* modern-combobox-popup-edge-fix */
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QAbstractItemView QScrollBar:vertical {
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margin: 0px;
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}
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)";
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}
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void CenterAlignDelegate::paint(QPainter *painter,
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const QStyleOptionViewItem &option,
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const QModelIndex &index) const {
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QStyleOptionViewItem opt = option;
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initStyleOption(&opt, index);
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opt.displayAlignment = Qt::AlignCenter;
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QStyledItemDelegate::paint(painter, opt, index);
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}
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QSize CenterAlignDelegate::sizeHint(const QStyleOptionViewItem &option,
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const QModelIndex &index) const {
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QSize base = QStyledItemDelegate::sizeHint(option, index);
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base.setHeight(qMax(base.height(), kModernComboMinItemHeight));
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return base;
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}
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ModernComboBox::ModernComboBox(QWidget *parent) : QComboBox(parent) {
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setItemDelegate(new CenterAlignDelegate(this));
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setSizeAdjustPolicy(QComboBox::AdjustToContents);
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setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
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connect(this, qOverload<int>(&QComboBox::currentIndexChanged), this,
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[this](int index) {
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if (m_maxTextWidth > 0 && index >= 0) {
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setToolTip(itemText(index));
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} else {
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setToolTip({});
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}
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});
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polishPopupView();
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}
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void ModernComboBox::setMaxTextWidth(int pixels) {
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m_maxTextWidth = pixels;
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updateGeometry();
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}
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QSize ModernComboBox::sizeHint() const {
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QFontMetrics fm(font());
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int maxW = 60;
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for (int i = 0; i < count(); ++i) {
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maxW = qMax(maxW, fm.horizontalAdvance(itemText(i)));
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}
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if (m_maxTextWidth > 0) {
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maxW = qMin(maxW, m_maxTextWidth);
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}
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int w = maxW + 16 + 16 + 32;
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int h = QComboBox::sizeHint().height();
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return QSize(w, h);
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}
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QSize ModernComboBox::minimumSizeHint() const { return sizeHint(); }
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void ModernComboBox::showPopup() {
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if (window() && window()->isFullScreen()) {
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showEmbeddedPopup();
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return;
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}
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polishPopupView();
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QComboBox::showPopup();
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auto *popupView = view();
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QWidget *popupContainer = popupView ? popupView->window() : nullptr;
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if (!popupView || !popupContainer) {
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return;
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}
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PopupFade::run(popupContainer);
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auto *vScrollBar = popupView->verticalScrollBar();
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if (vScrollBar && vScrollBar->isVisible()) {
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const int targetWidth = qMax(popupContainer->width(),
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width() + vScrollBar->sizeHint().width());
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if (targetWidth > popupContainer->width()) {
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popupContainer->resize(targetWidth, popupContainer->height());
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}
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}
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}
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void ModernComboBox::hidePopup() {
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closeEmbeddedPopup();
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QComboBox::hidePopup();
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}
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bool ModernComboBox::eventFilter(QObject *watched, QEvent *event) {
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if (!event) {
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return QComboBox::eventFilter(watched, event);
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}
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if (m_embeddedPopup && watched == m_embeddedPopup.data()) {
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if (event->type() == QEvent::MouseButtonPress ||
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event->type() == QEvent::MouseButtonDblClick) {
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closeEmbeddedPopup();
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return true;
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}
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}
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return QComboBox::eventFilter(watched, event);
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}
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void ModernComboBox::showEmbeddedPopup() {
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closeEmbeddedPopup();
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QWidget *host = window();
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if (!host || count() == 0) {
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return;
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}
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const bool flushRightScrollBar =
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property("flush-right-scrollbar").toBool();
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auto *overlay = new QWidget(host);
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overlay->setAttribute(Qt::WA_DeleteOnClose);
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overlay->setObjectName(QStringLiteral("modernComboEmbeddedOverlay"));
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overlay->setGeometry(host->rect());
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overlay->installEventFilter(this);
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auto *listFrame = new QFrame(overlay);
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listFrame->setObjectName(QStringLiteral("modernComboEmbeddedFrame"));
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listFrame->setFrameStyle(QFrame::NoFrame);
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listFrame->setProperty("flush-right-scrollbar", flushRightScrollBar);
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auto *frameLayout = new QVBoxLayout(listFrame);
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frameLayout->setContentsMargins(0, 0, 0, 0);
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frameLayout->setSpacing(0);
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auto *listWidget = new QListWidget(listFrame);
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listWidget->setObjectName(QStringLiteral("modernComboEmbeddedList"));
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listWidget->setProperty("flush-right-scrollbar", flushRightScrollBar);
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listWidget->setItemDelegate(new CenterAlignDelegate(listWidget));
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listWidget->setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
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listWidget->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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listWidget->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
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listWidget->setFocusPolicy(Qt::StrongFocus);
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listWidget->setFrameStyle(QFrame::NoFrame);
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listWidget->setContentsMargins(0, 0, 0, 0);
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for (int i = 0; i < count(); ++i) {
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auto *item = new QListWidgetItem(itemText(i));
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item->setData(Qt::UserRole, itemData(i));
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item->setTextAlignment(Qt::AlignCenter);
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listWidget->addItem(item);
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}
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if (currentIndex() >= 0 && currentIndex() < listWidget->count()) {
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listWidget->setCurrentRow(currentIndex());
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}
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frameLayout->addWidget(listWidget);
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constexpr int kMaxVisibleItems = 12;
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constexpr int kItemPadding = 12;
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const QFontMetrics fm(listWidget->font());
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const int itemH = qMax(fm.height() + kItemPadding, kModernComboMinItemHeight);
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const int visibleItems = qMin(count(), kMaxVisibleItems);
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int popupH = itemH * visibleItems + 6;
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int popupW = qMax(width(), 240);
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popupH = qMin(popupH, host->height() / 2);
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const QPoint comboBottomLeft = mapTo(host, QPoint(0, height()));
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const QPoint comboTopLeft = mapTo(host, QPoint(0, 0));
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int popupX = comboBottomLeft.x();
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int popupY = comboBottomLeft.y() + 4;
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if (popupY + popupH > host->height() - 10) {
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popupY = comboTopLeft.y() - popupH - 4;
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}
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if (popupX + popupW > host->width() - 10) {
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popupX = host->width() - popupW - 10;
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}
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popupX = qMax(10, popupX);
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popupY = qMax(10, popupY);
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listFrame->setGeometry(popupX, popupY, popupW, popupH);
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overlay->show();
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overlay->raise();
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listFrame->show();
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// Child overlay (not a top-level window) — FadeHelper, not PopupFade.
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FadeHelper::fadeIn(listFrame, AnimationTokens::DurationMs::kQuick);
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listWidget->setFocus();
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if (currentIndex() >= 0 && currentIndex() < listWidget->count()) {
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listWidget->scrollToItem(listWidget->item(currentIndex()),
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QAbstractItemView::PositionAtCenter);
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}
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m_embeddedPopup = overlay;
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connect(listWidget, &QListWidget::itemClicked, this,
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[this, listWidget](QListWidgetItem *) {
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const int row = listWidget->currentRow();
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if (row >= 0 && row < count()) {
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setCurrentIndex(row);
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}
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closeEmbeddedPopup();
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});
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auto *escShortcut =
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new QShortcut(QKeySequence(Qt::Key_Escape), overlay,
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nullptr, nullptr, Qt::WidgetWithChildrenShortcut);
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connect(escShortcut, &QShortcut::activated, this,
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[this]() { closeEmbeddedPopup(); });
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auto *enterShortcut =
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new QShortcut(QKeySequence(Qt::Key_Return), listWidget,
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nullptr, nullptr, Qt::WidgetWithChildrenShortcut);
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connect(enterShortcut, &QShortcut::activated, this,
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[this, listWidget]() {
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const int row = listWidget->currentRow();
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if (row >= 0 && row < count()) {
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setCurrentIndex(row);
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}
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closeEmbeddedPopup();
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});
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}
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void ModernComboBox::closeEmbeddedPopup() {
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if (m_embeddedPopup) {
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m_embeddedPopup->removeEventFilter(this);
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m_embeddedPopup->close();
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m_embeddedPopup = nullptr;
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}
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}
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void ModernComboBox::polishPopupView() {
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auto *popupView = view();
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if (!popupView) {
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return;
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}
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popupView->setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
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popupView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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QString popupStyleSheet = popupView->styleSheet();
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if (!popupStyleSheet.contains(QLatin1String(kPopupEdgeFixMarker))) {
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if (!popupStyleSheet.isEmpty() && !popupStyleSheet.endsWith(QLatin1Char('\n'))) {
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popupStyleSheet += QLatin1Char('\n');
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}
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popupStyleSheet += QLatin1String(kPopupEdgeFixQss);
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popupView->setStyleSheet(popupStyleSheet);
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}
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}
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void ModernComboBox::paintEvent(QPaintEvent *) {
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QStylePainter painter(this);
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QStyleOptionComboBox opt;
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initStyleOption(&opt);
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QString text = opt.currentText;
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opt.currentText = "";
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painter.drawComplexControl(QStyle::CC_ComboBox, opt);
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QRect textRect = rect().adjusted(0, 0, -kArrowWidth, 0);
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if (m_maxTextWidth > 0) {
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QFontMetrics fm(this->font());
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text = fm.elidedText(text, Qt::ElideRight, textRect.width() - 8);
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}
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painter.setPen(opt.palette.color(QPalette::ButtonText));
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painter.setFont(this->font());
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painter.drawText(textRect, Qt::AlignCenter | Qt::TextSingleLine, text);
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}
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