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 }