QT实现自定义侧边导航栏
资源内容介绍
侧边导航栏是应用程序界面的一种常见布局，它通常位于页面或应用程序的侧边位置，用来展示导航菜单或功能链接，方便用户快速访问不同的页面或功能。本示例展示了在QT中，通过自定义QWidget来实现自定义的侧边导航栏。你可以根据需要修改样式、添加图标等来达到你想要的效果。 #include "qnavigationwidget.h"#include <QPainter>#include <QDebug>QNavigationWidget::QNavigationWidget(QWidget *parent) : QWidget(parent){ backgroundColor = "#E4E4E4"; selectedColor = "#2CA7F8"; mouseInColor = "#C4C4C4"; rowHeight = 40; currentIndex = 0; mouseMoveIndex = -1; setMouseTracking(true); setFixedWidth(120);}QNavigationWidget::~QNavigationWidget(){}void QNavigationWidget::addItem(const QString &iconPath,const QString &title){ listIcons << iconPath; listItems << title; update();}void QNavigationWidget::setWidth(const int &width){ setFixedWidth(width);}void QNavigationWidget::setBackgroundColor(const QColor &color){ backgroundColor = color; update();}void QNavigationWidget::setSelectColor(const QColor &color){ selectedColor = color; update();}void QNavigationWidget::setMouseInColor(const QColor &color){ mouseInColor = color; update();}void QNavigationWidget::setRowHeight(const int &height){ rowHeight = height; update();}void QNavigationWidget::paintEvent(QPaintEvent *){ QPainter painter(this); painter.setRenderHint(QPainter::Antialiasing, true); // Draw background color. painter.setPen(Qt::NoPen); painter.setBrush(backgroundColor); painter.drawRect(rect()); // Draw Items int count = 0; for (const QString &str : listItems) { QPainterPath itemPath; itemPath.addRect(QRect(0, count * rowHeight, width(), rowHeight)); if (currentIndex == count) { painter.setPen("#FFFFFF"); painter.fillPath(itemPath, selectedColor); } else if(mouseMoveIndex == count) { painter.setPen("#FFFFFF"); painter.fillPath(itemPath, mouseInColor); } else { painter.setPen("#202020"); painter.fillPath(itemPath, backgroundColor); } //painter.drawText(QRect(40, count * rowHeight, width()-40, rowHeight), Qt::AlignVCenter | Qt::AlignHCenter, str); painter.drawPixmap(QRect(20, (count * rowHeight+(rowHeight-20)/2), 20, 20),QPixmap(listIcons[count])); painter.drawText(QRect(45, count * rowHeight, width()-40, rowHeight), Qt::AlignVCenter, str); ++count; }}void QNavigationWidget::mouseMoveEvent(QMouseEvent *e){ if (e->y() / rowHeight < listItems.count()) { mouseMoveIndex = e->y() / rowHeight; } else { mouseMoveIndex = -1; } update();}void QNavigationWidget::mousePressEvent(QMouseEvent *e){ if (e->y() / rowHeight < listItems.count()) { currentIndex = e->y() / rowHeight; emit currentItemChanged(currentIndex); update(); }}void QNavigationWidget::leaveEvent(QEvent *){ if(mouseMoveIndex !=-1 ) { mouseMoveIndex = -1; update(); }}