QComboBox是下拉列表框组件类&＃xff0c;QPlainTextEdit是一个多行文本编辑器。
添加具有用户数据的项 QComboBox::addltem() 函数的两种参数的原型定义如下&＃xff1a;
void addItem (const QString &text, const QVariant &userData &＃61; QVariant())
void addItem (const QIcon &icon, const QString &text, const QVariant &userData &＃61; QVariant())
不管是哪一个 addItem() 函数&＃xff0c;后面都有一个可选的 QVariant 类型的参数 userData&＃xff0c;可以利用这个变量存储用户定义数据。
添加图标文件夹
在项目上右键&＃xff0c;‘Add New’-》‘Qt’-》‘Qt Resource File’-》‘choose’-》‘名称’-》‘下一步’-》‘完成’&＃xff1b;
在‘Resource’下会生成一个‘名称.qrc’&＃xff0c;右键‘Add Prefix’-》输入&＃39;/&＃39; -》‘yes to All’-》右键‘**.qrc’-》‘添加现有文件&＃xff08;选择指定文件夹下所有或单个图标&＃xff09;’-》‘yes to All’&＃xff1b;
获取ico图标路径&＃xff1a;右键图标&＃xff0c;选择‘Copy Path...’。
设置PlainTextEdit的只读属性&＃xff1a;
ui->plainTextEdit->setReadOnly(checked);
设置ComboBox的可编辑&＃xff1a;
ui->comboBox->setEditable(checked);
界面如下&＃xff1a;
//头文件
#ifndef WIDGET_H
#define WIDGET_H#include
class Widget;
}class Widget : public QWidget
{Q_OBJECTpublic:explicit Widget(QWidget *parent &＃61; nullptr);~Widget();private slots:void on_btnIniItems_clicked();void on_btnIni2_clicked();void on_comboBox_currentIndexChanged(const QString &arg1);void on_comboBox_2_currentIndexChanged(const QString &arg1);void on_btnToComboBox_clicked();void on_plainTextEdit_customContextMenuRequested(const QPoint &pos);void on_btnClearText_clicked();void on_enableEdit_clicked(bool checked);void on_readOnly_clicked(bool checked);private:Ui::Widget *ui;
};#endif // WIDGET_H
cpp文件&＃xff1a;
#include "widget.h"
#include "ui_widget.h"
#include
#include
{ui->setupUi(this);
}Widget::~Widget()
{delete ui;
}void Widget::on_btnIniItems_clicked()
{QIcon icon;icon.addFile(":/images/icons/cityscape.ico");ui->comboBox->clear();
// for (int i &＃61; 0;i <20;i&＃43;&＃43;){
// ui->comboBox->addItem(icon,QString::asprintf("Ttem %d",i));
// }QStringList strList;strList<
}void Widget::on_btnIni2_clicked()
{QMap
}void Widget::on_comboBox_currentIndexChanged(const QString &arg1)
{ui->plainTextEdit->appendPlainText(arg1);
}void Widget::on_comboBox_2_currentIndexChanged(const QString &arg1)
{QString zone &＃61; ui->comboBox_2->currentData().toString();ui->plainTextEdit->appendPlainText(arg1&＃43;QStringLiteral("&＃xff1a;区号")&＃43;"0"&＃43;zone);
}void Widget::on_btnToComboBox_clicked()
{QTextDocument *doc &＃61; ui->plainTextEdit->document();int cnt &＃61; doc->blockCount();QIcon icon(":/images/icons/cityscape.ico");ui->comboBox->clear();for (int i&＃61;0;i
}void Widget::on_plainTextEdit_customContextMenuRequested(const QPoint &pos)
{QMenu *menu &＃61; ui->plainTextEdit->createStandardContextMenu();menu->exec(pos);
}void Widget::on_btnClearText_clicked()
{ui->plainTextEdit->clear();
}void Widget::on_enableEdit_clicked(bool checked)
{ui->comboBox->setEditable(checked);
}void Widget::on_readOnly_clicked(bool checked)
{ui->plainTextEdit->setReadOnly(checked);
}
京公网安备 11010802041100号