feat: QComboBox and QPlainTextEdit
QComboBox（下拉列表框）和QPlainTextEdit（可同时编辑多行的富文本编辑器）的介绍和使用
This commit is contained in:
touwoyimuli
parent
054148433a
commit
4342e0091c
120
QtQcomboBoxEx/ExQcomboBox.cpp
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120
QtQcomboBoxEx/ExQcomboBox.cpp
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#include "ExQcomboBox.h"
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#include "ui_ExQcomboBox.h"
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#include <QMap>
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#include <QTextBlock>
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#include <QDebug>
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ExQcomboBox::ExQcomboBox(QWidget *parent) :
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QWidget(parent),
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ui(new Ui::ExQcomboBox)
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{
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ui->setupUi(this);
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setWindowTitle(QObject::tr("QComboBox和QPlainTextEdit的用法"));
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connect(ui->comBoxRight, &QComboBox::currentTextChanged, this, &ExQcomboBox::onSelectDisplay);
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}
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ExQcomboBox::~ExQcomboBox()
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{
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delete ui;
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}
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//左上角区域+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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//初始化简单的QComboBox控件
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void ExQcomboBox::on_btnLeftInit_clicked()
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{
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QIcon ico;
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ico.addFile(":/images/github.ico");
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ui->comBoxLeft->clear();
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for (int i = 0; i < 13; i++) {
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ui->comBoxLeft->addItem(ico, QString("第%1个item项").arg(i)); //带有ico图标的项
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}
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}
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//清除简单的QComboBox控件
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void ExQcomboBox::on_btnLeftClear_clicked()
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{
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ui->comBoxLeft->clear();
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}
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//勾选QComboBox为可以编辑状态
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void ExQcomboBox::on_checkBoxOnlyWrite_clicked()
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{
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if(ui->checkBoxOnlyWrite->isChecked())
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ui->comBoxLeft->setEditable(true);
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else
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ui->comBoxLeft->setEditable(false);
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}
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//右上角区域+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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//初始化复杂的QComboBox控件（给每一项都添加一个对应的自定义数据[不显示]）
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void ExQcomboBox::on_btnRightInit_clicked()
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{
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QIcon ico;
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ico.addFile(":/images/gril.ico");
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QMap<QString, QString> map;
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map.insert("张投", "16岁");
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map.insert("张我", "17岁");
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map.insert("张以", "18岁");
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map.insert("张木", "19岁");
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map.insert("张李", "20岁");
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map.insert("张，", "21岁");
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map.insert("张报", "22岁");
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map.insert("张之", "23岁");
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map.insert("张以", "24岁");
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map.insert("张琼", "25岁");
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map.insert("张玖", "26岁");
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map.insert("张。", "27岁");
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ui->comBoxRight->clear();
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foreach(QString str, map.keys()){
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ui->comBoxRight->addItem(ico, str, map.value(str)); //因为有Map，所以QComboBox显示会按照key排序，而非上面的定义顺序,注意不是map.key(str)
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}
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}
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//底部区域+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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//文本框内容每次读取一行，添加到ComboBox作为item项
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void ExQcomboBox::on_btnBottomAdd_clicked()
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{
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QTextDocument* doc = ui->plainTextEdit->document(); //获取文本对象
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int cnt = doc->blockCount(); //回车符是一个block
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QIcon ico;
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ico.addFile(":/images/github.ico");
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ui->comBoxLeft->clear();
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ui->comBoxRight->clear();
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for (int i = 0; i < cnt; i++) {
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QTextBlock text = doc->findBlockByNumber(i); //获取文本中一段（以换行为标志）
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ui->comBoxLeft->addItem(ico, text.text());
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ui->comBoxRight->addItem(ico, text.text(), QString("附加内容:%1").arg(i));
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}
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}
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//清除可编辑的富文本的编辑器的所有内容
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void ExQcomboBox::on_btnBottomClear_clicked()
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{
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ui->plainTextEdit->clear();
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}
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//设置富文本的编辑器(plainTextEdit)只可读
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void ExQcomboBox::on_checkBoxOnlyRead_clicked()
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{
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if(ui->checkBoxOnlyRead->isChecked())
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ui->plainTextEdit->setEnabled(false);
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else
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ui->plainTextEdit->setEnabled(true);
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}
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//公共的槽函数区域+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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//显示当前选中的ComboBox的item项的内容
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void ExQcomboBox::onSelectDisplay(QString str)
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{
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QString strData = ui->comBoxRight->currentData().toString(); // 获取当前item的关联数据的内容
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ui->labDisplay->setText(str + " " + strData);
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ui->plainTextEdit->appendPlainText(str + " " + strData);
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}
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32
QtQcomboBoxEx/ExQcomboBox.h
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32
QtQcomboBoxEx/ExQcomboBox.h
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#ifndef EXQCOMBOBOX_H
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#define EXQCOMBOBOX_H
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#include <QWidget>
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namespace Ui {
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class ExQcomboBox;
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}
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class ExQcomboBox : public QWidget
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{
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Q_OBJECT
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public:
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explicit ExQcomboBox(QWidget *parent = nullptr);
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~ExQcomboBox();
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private slots:
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void on_btnLeftInit_clicked();
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void on_btnLeftClear_clicked();
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void on_checkBoxOnlyWrite_clicked();
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void on_btnRightInit_clicked();
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void on_btnBottomAdd_clicked();
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void on_btnBottomClear_clicked();
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void on_checkBoxOnlyRead_clicked();
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void onSelectDisplay(QString str);
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private:
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Ui::ExQcomboBox *ui;
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};
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#endif // EXQCOMBOBOX_H
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158
QtQcomboBoxEx/ExQcomboBox.ui
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158
QtQcomboBoxEx/ExQcomboBox.ui
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<?xml version="1.0" encoding="UTF-8"?>
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<ui version="4.0">
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<class>ExQcomboBox</class>
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<widget class="QWidget" name="ExQcomboBox">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>0</y>
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<width>775</width>
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<height>383</height>
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</rect>
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</property>
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<property name="windowTitle">
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<string>ExQcomboBox</string>
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</property>
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<layout class="QVBoxLayout" name="verticalLayout_2">
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<item>
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<layout class="QHBoxLayout" name="horizontalLayout">
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<item>
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<widget class="QGroupBox" name="groupBox">
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<property name="title">
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<string>简单地ComboBox（下拉列表框）：</string>
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</property>
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<layout class="QGridLayout" name="gridLayout">
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<item row="0" column="0">
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<widget class="QPushButton" name="btnLeftInit">
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<property name="text">
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<string>初始化列表</string>
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</property>
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</widget>
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</item>
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<item row="0" column="1">
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<widget class="QPushButton" name="btnLeftClear">
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<property name="text">
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<string>清除列表</string>
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</property>
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</widget>
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</item>
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<item row="0" column="2">
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<widget class="QCheckBox" name="checkBoxOnlyWrite">
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<property name="text">
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<string>下拉框为可编辑</string>
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</property>
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</widget>
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</item>
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<item row="1" column="0" colspan="3">
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<widget class="QComboBox" name="comBoxLeft">
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<item>
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<property name="text">
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<string>默认的第一个item：投我以木李</string>
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</property>
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<property name="icon">
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<iconset resource="resources.qrc">
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<normaloff>:/images/github.ico</normaloff>:/images/github.ico</iconset>
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</property>
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</item>
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<item>
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<property name="text">
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<string>默认的第二个item：报之以琼玖</string>
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</property>
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<property name="icon">
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<iconset resource="resources.qrc">
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<normaloff>:/images/gril.ico</normaloff>:/images/gril.ico</iconset>
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</property>
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</item>
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<item>
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<property name="text">
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<string>github.io：https://touwoyimuli.github.io/</string>
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</property>
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</item>
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</widget>
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</item>
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</layout>
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</widget>
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</item>
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<item>
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<widget class="QGroupBox" name="groupBox_2">
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<property name="title">
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<string>复杂地ComboBox（项可存储自定义的数据内容）：</string>
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</property>
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<layout class="QGridLayout" name="gridLayout_2">
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<item row="0" column="0">
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<widget class="QPushButton" name="btnRightInit">
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<property name="text">
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<string>初始化姓名+年龄</string>
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</property>
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</widget>
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</item>
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<item row="1" column="0">
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<widget class="QComboBox" name="comBoxRight">
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<item>
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<property name="text">
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<string>因为有Map，所以QComboBox显示会按照key排序，而非程序代码的定义顺序</string>
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</property>
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<property name="icon">
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<iconset resource="resources.qrc">
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<normaloff>:/images/gril.ico</normaloff>:/images/gril.ico</iconset>
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</property>
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</item>
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</widget>
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</item>
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</layout>
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</widget>
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</item>
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</layout>
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</item>
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<item>
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<widget class="QGroupBox" name="groupBox_3">
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<property name="title">
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<string>QPlainTextEdit（多行可编辑的富文本的编辑器）：</string>
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</property>
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<layout class="QVBoxLayout" name="verticalLayout">
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<item>
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<layout class="QHBoxLayout" name="horizontalLayout_2">
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<item>
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<widget class="QPushButton" name="btnBottomAdd">
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<property name="text">
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<string>文本框内容添加到ComboBox</string>
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</property>
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</widget>
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</item>
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<item>
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<widget class="QPushButton" name="btnBottomClear">
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<property name="text">
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<string>清除文本内容</string>
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</property>
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</widget>
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</item>
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<item>
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<widget class="QCheckBox" name="checkBoxOnlyRead">
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<property name="text">
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<string>富文本的编辑器只可读</string>
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</property>
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</widget>
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</item>
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</layout>
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</item>
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<item>
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<widget class="QPlainTextEdit" name="plainTextEdit"/>
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</item>
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<item>
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<widget class="QLabel" name="labDisplay">
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<property name="text">
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<string>显示当前的Item项：</string>
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</property>
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</widget>
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</item>
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</layout>
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</widget>
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</item>
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</layout>
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</widget>
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<layoutdefault spacing="6" margin="11"/>
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<resources>
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<include location="resources.qrc"/>
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</resources>
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<connections/>
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</ui>
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45
QtQcomboBoxEx/QtQcomboBoxEx.pro
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45
QtQcomboBoxEx/QtQcomboBoxEx.pro
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#-------------------------------------------------
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#
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# Project created by QtCreator 2019-08-26T23:53:34
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#
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#-------------------------------------------------
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QT += core gui
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greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
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TARGET = QtQcomboBoxEx
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TEMPLATE = app
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# The following define makes your compiler emit warnings if you use
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# any feature of Qt which has been marked as deprecated (the exact warnings
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# depend on your compiler). Please consult the documentation of the
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# deprecated API in order to know how to port your code away from it.
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DEFINES += QT_DEPRECATED_WARNINGS
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# You can also make your code fail to compile if you use deprecated APIs.
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# In order to do so, uncomment the following line.
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# You can also select to disable deprecated APIs only up to a certain version of Qt.
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#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
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CONFIG += c++11
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SOURCES += \
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main.cpp \
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ExQcomboBox.cpp
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HEADERS += \
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ExQcomboBox.h
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FORMS += \
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ExQcomboBox.ui
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RC_ICONS += images/qt.ico
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# Default rules for deployment.
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qnx: target.path = /tmp/$${TARGET}/bin
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else: unix:!android: target.path = /opt/$${TARGET}/bin
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!isEmpty(target.path): INSTALLS += target
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RESOURCES += \
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resources.qrc
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BIN
QtQcomboBoxEx/images/github.ico
Normal file
BIN
QtQcomboBoxEx/images/github.ico
Normal file
Binary file not shown.
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After Width: | Height: | Size: 4.2 KiB |
BIN
QtQcomboBoxEx/images/gril.ico
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BIN
QtQcomboBoxEx/images/gril.ico
Normal file
Binary file not shown.
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After Width: | Height: | Size: 4.2 KiB |
BIN
QtQcomboBoxEx/images/qt.ico
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BIN
QtQcomboBoxEx/images/qt.ico
Normal file
Binary file not shown.
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After Width: | Height: | Size: 4.2 KiB |
11
QtQcomboBoxEx/main.cpp
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11
QtQcomboBoxEx/main.cpp
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#include "ExQcomboBox.h"
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#include <QApplication>
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int main(int argc, char *argv[])
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{
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QApplication a(argc, argv);
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ExQcomboBox w;
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w.show();
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return a.exec();
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}
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6
QtQcomboBoxEx/resources.qrc
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6
QtQcomboBoxEx/resources.qrc
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<RCC>
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<qresource prefix="/">
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<file>images/github.ico</file>
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<file>images/gril.ico</file>
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</qresource>
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</RCC>
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