zoukankan      html  css  js  c++  java
  • Qt QComboBox+QCompleter实现搜索自动匹配

    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 }
  • 相关阅读:
    理解Device Tree Usage
    Unhandled Exception in EL3
    python的multitask模块安装
    利用python制作在线视频播放器遇到的一些问题
    设置linux代理完成apt-get
    Eric6安装问题解决
    关于代码重构的比喻
    AAC的RTP封装中的AU头分析
    CORE DUMP生成调试
    开源库SRT编译指南
  • 原文地址:https://www.cnblogs.com/ybqjymy/p/14377813.html
Copyright © 2011-2022 走看看