搜索框默认隐藏起来，在界面上按Ctrl+F的时候打开搜索匹配输入框
1 m_speedSearch = new SpeedSearch(this); 2 m_speedSearch->initData(QStringList() << "123" << "124" << "110" << "111"); 3 m_speedSearch->hide(); 4
5 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_F), this); 6 connect(shortcut, SIGNAL(activated()), this, SLOT(slotSpeedSearch())); 7
8 void MainWindow::slotSpeedSearch() 9 { 10 m_speedSearch->move(100, 50); 11 m_speedSearch->show(); 12 }
打开后清空之前的显示并且将焦点设置到编辑框
1 void SpeedSearch::showEvent(QShowEvent *event) 2 { 3 QWidget::showEvent(event); 4 m_comboBox->setCurrentText(""); 5 m_comboBox->setFocus(); 6 }
数据初始化
1 void SpeedSearch::initData(const QStringList &strList) 2 { 3 if (m_completer) { 4 delete m_completer; 5 } 6 m_completer = new QCompleter(strList, this); 7 m_completer->setFilterMode(Qt::MatchContains); 8 m_comboBox->setCompleter(m_completer); 9 m_comboBox->clear(); 10 m_comboBox->addItems(strList); 11 }
匹配规则设置为contains否则从第一个字符开始匹配，中间的匹配不了。给ComboBox也初始化数据这样点击弹出按钮后列表框也有数据
speed_search.h
1 #pragma once
2
3 #include <QWidget>
4
5 class QComboBox; 6 class QCompleter; 7 class SpeedSearch : public QWidget 8 { 9 Q_OBJECT 10 public: 11 explicit SpeedSearch(QWidget *parent = 0); 12 void initData(const QStringList &strList); 13
14 public slots: 15 void slotCurrentIndexChanged(const QString &str); 16
17 protected: 18 void showEvent(QShowEvent *event); 19
20 private: 21 QComboBox *m_comboBox; 22 QCompleter *m_completer; 23 };
speed_search.cpp
1 #include "speed_search.h"
2 #include <QtWidgets>
3
4 SpeedSearch::SpeedSearch(QWidget *parent) 5 : QWidget(parent) 6 , m_completer(nullptr) 7 { 8 m_comboBox = new QComboBox(this); 9 m_comboBox->setEditable(true); 10 connect(m_comboBox, SIGNAL(currentIndexChanged(QString)), this, SLOT(slotCurrentIndexChanged(QString))); 11
12 QVBoxLayout *vLayout = new QVBoxLayout(this); 13 vLayout->setContentsMargins(0, 0, 0, 0); 14 vLayout->setSpacing(0); 15 vLayout->addWidget(m_comboBox); 16
17 this->setFixedSize(150, 24); 18 } 19
20 void SpeedSearch::initData(const QStringList &strList) 21 { 22 if (m_completer) { 23 delete m_completer; 24 } 25 m_completer = new QCompleter(strList, this); 26 m_completer->setFilterMode(Qt::MatchContains); 27 m_comboBox->setCompleter(m_completer); 28 m_comboBox->clear(); 29 m_comboBox->addItems(strList); 30 } 31
32 void SpeedSearch::slotCurrentIndexChanged(const QString &str) 33 { 34 qDebug() << str; 35 hide(); 36 } 37
38 void SpeedSearch::showEvent(QShowEvent *event) 39 { 40 QWidget::showEvent(event); 41 m_comboBox->setCurrentText(""); 42 m_comboBox->setFocus(); 43 }