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Adds utility class to get random values
Adds utility class to get random values

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r1175:9f9ab053f00b
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DragDropTabSwitcher.cpp
180 lines | 6.1 KiB | text/x-c | CppLexer
/ gui / src / DragAndDrop / DragDropTabSwitcher.cpp
#include "DragAndDrop/DragDropTabSwitcher.h"
#include <QAbstractButton>
#include <QDragEnterEvent>
#include <QDragMoveEvent>
#include <QTimer>
#include "SqpApplication.h"
Q_LOGGING_CATEGORY(LOG_DragDropTabSwitcher, "DragDropTabSwitcher")
const int CHANGE_TAB_INTERVAL = 400; // time necessary over a tab to accept the switch
const int SCROLL_BUTTON_AUTO_CLICK_INTERVAL
= 500; // time between 2 auto clicks on a scroll button of the tab bar
struct DragDropTabSwitcher::DragDropTabSwitcherPrivate {
QList<QTabBar *> m_TabBarList;
QTabBar *m_CurrentTabBar = nullptr;
int m_HoveredTabIndex = -1;
std::unique_ptr<QTimer> m_TabSwitchTimer = nullptr;
QAbstractButton *m_HoveredScrollButton = nullptr;
std::unique_ptr<QTimer> m_ScrollButtonsTimer = nullptr;
explicit DragDropTabSwitcherPrivate()
: m_TabSwitchTimer{std::make_unique<QTimer>()},
m_ScrollButtonsTimer{std::make_unique<QTimer>()}
{
m_TabSwitchTimer->setSingleShot(true);
m_TabSwitchTimer->setInterval(CHANGE_TAB_INTERVAL);
QObject::connect(m_TabSwitchTimer.get(), &QTimer::timeout, [this]() {
if (m_CurrentTabBar) {
m_CurrentTabBar->setCurrentIndex(m_HoveredTabIndex);
}
else {
qCWarning(LOG_DragDropTabSwitcher()) << "DragDropTabSwitcherPrivate::timeout: "
"Cannot select a new tab: unknown current "
"tab bar.";
}
});
m_ScrollButtonsTimer->setInterval(SCROLL_BUTTON_AUTO_CLICK_INTERVAL);
QObject::connect(m_ScrollButtonsTimer.get(), &QTimer::timeout, [this]() {
if (m_HoveredScrollButton) {
m_HoveredScrollButton->animateClick();
}
else {
qCWarning(LOG_DragDropTabSwitcher())
<< "DragDropTabSwitcherPrivate::timeoutScroll: "
"Unknown scroll button";
}
});
}
bool isScrollTabButton(QAbstractButton *button, QTabBar *tabBar)
{
auto isNextOrPreviousTabButton = true;
if (tabBar->isAncestorOf(button)) {
for (auto i = 0; i < tabBar->count(); ++i) {
if (tabBar->tabButton(i, QTabBar::RightSide) == button
|| tabBar->tabButton(i, QTabBar::LeftSide) == button) {
isNextOrPreviousTabButton = false;
break;
}
}
}
else {
isNextOrPreviousTabButton = false;
}
return isNextOrPreviousTabButton;
}
QAbstractButton *tabScrollButtonAt(const QPoint &pos, QTabBar *tabBar)
{
auto globalPos = tabBar->mapToGlobal(pos);
auto widgetUnderMouse = sqpApp->widgetAt(globalPos);
if (auto btn = qobject_cast<QAbstractButton *>(widgetUnderMouse)) {
if (isScrollTabButton(btn, tabBar)) {
return btn;
}
}
return nullptr;
}
};
DragDropTabSwitcher::DragDropTabSwitcher(QObject *parent)
: QObject(parent), impl{spimpl::make_unique_impl<DragDropTabSwitcherPrivate>()}
{
}
void DragDropTabSwitcher::addTabBar(QTabBar *tabBar)
{
impl->m_TabBarList << tabBar;
tabBar->setAcceptDrops(true);
}
void DragDropTabSwitcher::removeTabBar(QTabBar *tabBar)
{
impl->m_TabBarList.removeAll(tabBar);
tabBar->setAcceptDrops(false);
}
bool DragDropTabSwitcher::eventFilter(QObject *obj, QEvent *event)
{
if (event->type() == QEvent::DragMove) {
if (impl->m_CurrentTabBar) {
QWidget *w = static_cast<QWidget *>(obj);
if (!impl->m_CurrentTabBar->isAncestorOf(w)) {
return false;
}
auto moveEvent = static_cast<QDragMoveEvent *>(event);
auto scrollButton = impl->tabScrollButtonAt(moveEvent->pos(), impl->m_CurrentTabBar);
if (!scrollButton) {
auto tabIndex = impl->m_CurrentTabBar->tabAt(moveEvent->pos());
if (tabIndex >= 0 && tabIndex != impl->m_CurrentTabBar->currentIndex()) {
// The mouse is over an unselected tab
if (!impl->m_TabSwitchTimer->isActive()
|| tabIndex != impl->m_HoveredTabIndex) {
impl->m_HoveredTabIndex = tabIndex;
impl->m_TabSwitchTimer->start();
}
else {
// do nothing, timer already running
}
}
else {
impl->m_TabSwitchTimer->stop();
}
impl->m_ScrollButtonsTimer->stop();
}
else {
// The mouse is over a scroll button
// click it in a loop with a timer
if (!impl->m_ScrollButtonsTimer->isActive()
|| impl->m_HoveredScrollButton != scrollButton) {
impl->m_HoveredScrollButton = scrollButton;
impl->m_ScrollButtonsTimer->start();
}
}
}
}
else if (event->type() == QEvent::DragEnter) {
QWidget *w = static_cast<QWidget *>(obj);
for (auto tabBar : impl->m_TabBarList) {
if (w == tabBar) {
auto enterEvent = static_cast<QDragEnterEvent *>(event);
enterEvent->acceptProposedAction();
enterEvent->setDropAction(Qt::IgnoreAction);
impl->m_CurrentTabBar = tabBar;
break;
}
}
}
else if (event->type() == QEvent::DragLeave || event->type() == QEvent::Drop) {
if (impl->m_CurrentTabBar) {
impl->m_HoveredTabIndex = -1;
impl->m_TabSwitchTimer->stop();
impl->m_CurrentTabBar = nullptr;
impl->m_ScrollButtonsTimer->stop();
}
}
return false;
}