QT标签栏TabBar实现侧边工具栏的功能

#include "CustomTabWidget.h" #include <QApplication> #include <QMouseEvent> #include <QPixmap> #include <QMimeData> #include <QPainter> #include <QCursor> #include <QDrag> #include <QDebug> #include "CustomPopDialog.h" CustomTabWidget::CustomTabWidget(QWidget *parent) : QTabWidget(parent) { //ui.setupUi(this); //Stylesheet does not work Solution setAttribute(Qt::WA_StyledBackground); initTabBar(); setMouseTracking(true); connect(this, SIGNAL(tabCloseRequested(int)), this, SLOT(getCloseRequested(int))); } CustomTabWidget::~CustomTabWidget() { } void CustomTabWidget::getCloseRequested(int value) { removeTab(value); } // add a page int CustomTabWidget::addTab(QWidget* page) { return addTab(page, page->windowTitle()); } int CustomTabWidget::addTab(QWidget* page, const QString& windowTitle) { if (!page) return -1; // This window is in pop-up status, and cannot be added repeatedly if (m_QLPopedPage.contains(page)) { return -2; } // !!! Set to release when calling close, and sometimes release when it cannot be closed //page->setAttribute(Qt::WA_DeleteOnClose); page->setWindowTitle(windowTitle); // widget title 和 tab title一致 const int index = QTabWidget::addTab(page, windowTitle); setCurrentIndex(index); emit updateTabWidgetPage(this); return index; } int CustomTabWidget::addTab(QWidget* page, const QIcon& icon, const QString& windowTitle) { if (!page) return -1; // This window is in pop-up status, and cannot be added repeatedly if (m_QLPopedPage.contains(page)) { return -2; } // !!! Set to release when calling close, and sometimes release when it cannot be closed //page->setAttribute(Qt::WA_DeleteOnClose); page->setWindowTitle(windowTitle); // widget title 和 tab title一致 const int index = QTabWidget::addTab(page, icon, windowTitle); setCurrentIndex(index); emit updateTabWidgetPage(this); return index; } // Add a fixed page, which cannot be dragged out void CustomTabWidget::addFixedTab(QWidget* page) { if (!page) return; addTab(page); setFixedTabPage(page); } //Set that a page cannot be closed and dragged out void CustomTabWidget::setFixedTabPage(QWidget* page) { if (!page) return; setFixedTabPage(indexOf(page)); } void CustomTabWidget::setFixedTabPage(int index) { if (isTabPageValid(index)) { QWidget* page = this->widget(index); if (page && !m_QLfixedPage.contains(page)) { m_QLfixedPage.push_back(page); //Do not display the close button, replace with nullptr tabBar()->setTabButton(index, QTabBar::RightSide, nullptr); } } } // Remove tab void CustomTabWidget::removeTab(int index) { if (isTabPageValid(index)) { QWidget* page = this->widget(index); //Judge whether it is fixed and not deleted if (!page || m_QLfixedPage.contains(page)) return; //The removeTab is only removed from the tabbar and not released QTabWidget::removeTab(index); emit updateTabWidgetPage(this); //You can call delete to release tab page or set the tab page to WA_ DeleteOnClose, release on close //delete page; //page->close(); } } // Remove tab void CustomTabWidget::removeTab(QWidget* page) { if (!page) return; removeTab(indexOf(page)); } // Remove current tab void CustomTabWidget::removeCurrentTab() { removeTab(currentIndex()); } // Clear all pages (no include fixed pages), only the tabs on the tabbar will be cleared, and the pop-up will not be cleared void CustomTabWidget::clearTab() { const int tab_count = this->count(); //Delete from the back to the front, so that the index position is fixed for (int index = tab_count - 1; index >= 0; index--) { removeTab(index); } } // Clear all pages (include fixed pages), only the tabs on the tabbar will be cleared, and the pop-up will not be cleared void CustomTabWidget::clearAllTab() { //全部移除 while (this->count() > 0) { //QWidget *page=this->widget(0); QTabWidget::removeTab(0); // 直接调用QTabWidget函数，不判断是否为固定标签 // if(page) // page->close(); } m_QLfixedPage.clear(); } // page is valid bool CustomTabWidget::isTabPageValid(int index) const { if (index < 0 || index >= this->count()) return false; return true; } // page is valid bool CustomTabWidget::isTabPageValid(QWidget* page) const { if (!page) return false; return isTabPageValid(indexOf(page)); } bool CustomTabWidget::isTabPagePoped(QWidget* page) const { if (!page) return false; // 是否包含 return m_QLPopedPage.contains(page); } void CustomTabWidget::updateTabWidgetShow(std::map<QWidget*, bool> tabWidgetState) { for (auto it = tabWidgetState.begin(); it != tabWidgetState.end(); it++) { if (it->second) { QWidget* widget = it->first; if (isTabPagePoped(widget)) { emit closeDialogWidget(widget); } else { addTab(widget); } } else { QWidget* widget = it->first; removeTab(widget); } } } void CustomTabWidget::showEvent(QShowEvent* event) { QTabWidget::showEvent(event); //When initializing, set the existing settings to be released when closing for (int index = 0; index < this->count(); index++) { QWidget* page = this->widget(index); if (page) page->setAttribute(Qt::WA_DeleteOnClose); } } void CustomTabWidget::mousePressEvent(QMouseEvent* event) { int a = 0; } void CustomTabWidget::mouseMoveEvent(QMouseEvent* event) { int a = 0; } // Set whether the label can be closed, and connect the signal and slot when it can be closed void CustomTabWidget::setTabsClosable(bool flag) { if (flag) { connect(m_pBar, SIGNAL(QTabBar::tabCloseRequested(int)), this, SLOT(MyTabWidget::removeTab(int))); } QTabWidget::setTabsClosable(flag); } /**************************************/ void CustomTabWidget::initTabBar() { CustomTabBar* m_pBar = new CustomTabBar(this); this->m_pBar = m_pBar; setTabBar(m_pBar); //Drag outside - mouse not released yet connect(m_pBar, &CustomTabBar::beginDragOut, this, [this, m_pBar](int index) { if (!isTabPageValid(index)) { qDebug() << "beginDragOut index error"; return; } QWidget* drag_tab = this->widget(index); //Fixed tab will not be dragged out if (!drag_tab || m_QLfixedPage.contains(drag_tab)) { qDebug() << "beginDragOut fixed tab"; return; } //Drag the current page as a snapshot //Size added with title block and border QPixmap pixmap(drag_tab->size() + QSize(2, 31)); pixmap.fill(Qt::transparent); //Set image transparency QPainter painter(&pixmap); if (painter.isActive()) { //I want to make a title bar above the content here //But i can't get the image of the default title bar. Just draw a rectangular box //If the external theme color is set, it needs to be changed QRect title_rect{ 0,0,pixmap.width(),30 }; painter.fillRect(title_rect, Qt::white); painter.drawText(title_rect, Qt::AlignLeft | Qt::AlignVCenter, " " + drag_tab->windowTitle()); /*Return an adjusted QRec