QListWidget插入item方法

2019-11-08 03:15:27

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QListWidget可以显示一个清单，清单中的每个项目是QListWidgetItem的一个实例，每个项目可以通过QListWidgetItem来操作。可以通过QListWidgetItem来设置每个项目的图像与文字。下面说明3个例子，一个例子只显示文字，一个例子显示文字和图标，最后一个例子增加每个项的选择的信号。

例子1：

[cpp] view plain copyPRint?#include <Qapplication> #include <QWidget> #include <QVBoxLayout> #include <QListWidget> #include <QListWidgetItem> int main(int argc, char** argv) { QApplication app(argc, argv); QWidget* widget = new QWidget; QListWidget* listWidget = new QListWidget; QVBoxLayout* layout = new QVBoxLayout; QListWidgetItem* lst1 = new QListWidgetItem("data", listWidget); QListWidgetItem* lst2 = new QListWidgetItem("decision", listWidget); QListWidgetItem* lst3 = new QListWidgetItem("document", listWidget); QListWidgetItem* lst4 = new QListWidgetItem("process", listWidget); QListWidgetItem* lst5 = new QListWidgetItem("printer", listWidget); listWidget->insertItem(1, lst1); listWidget->insertItem(2, lst2); listWidget->insertItem(3, lst3); listWidget->insertItem(4, lst4); listWidget->insertItem(5, lst5); listWidget->show(); layout->addWidget(listWidget); widget->setLayout(layout); widget->show(); app.exec(); }

运行如下图：

第2个例子：

[cpp] view plain copyprint?#include <QApplication> #include <QWidget> #include <QVBoxLayout> #include <QListWidget> #include <QListWidgetItem> int main(int argc, char** argv) { QApplication app(argc, argv); QWidget* widget = new QWidget; QListWidget* listWidget = new QListWidget; QVBoxLayout* layout = new QVBoxLayout; QListWidgetItem* lst1 = new QListWidgetItem(QIcon("images/data.png"), "data", listWidget); QListWidgetItem* lst2 = new QListWidgetItem(QIcon("images/decision.png"), "decision", listWidget); QListWidgetItem* lst3 = new QListWidgetItem(QIcon("images/document.png"), "document", listWidget); QListWidgetItem* lst4 = new QListWidgetItem(QIcon("images/process.png"), "process", listWidget); QListWidgetItem* lst5 = new QListWidgetItem(QIcon("images/printer.png"), "printer", listWidget); listWidget->insertItem(1, lst1); listWidget->insertItem(2, lst2); listWidget->insertItem(3, lst3); listWidget->insertItem(4, lst4); listWidget->insertItem(5, lst5); listWidget->show(); layout->addWidget(listWidget); widget->setLayout(layout); widget->show(); app.exec(); }

#include <QApplication>#include <QWidget>#include <QVBoxLayout>#include <QListWidget>#include <QListWidgetItem>int main(int argc, char** argv){	QApplication app(argc, argv);	QWidget* widget = new QWidget;	QListWidget* listWidget = new QListWidget;	QVBoxLayout* layout = new QVBoxLayout;	QListWidgetItem* lst1 = new QListWidgetItem(QIcon("images/data.png"), "data", listWidget);	QListWidgetItem* lst2 = new QListWidgetItem(QIcon("images/decision.png"), "decision", listWidget);	QListWidgetItem* lst3 = new QListWidgetItem(QIcon("images/document.png"), "document", listWidget);	QListWidgetItem* lst4 = new QListWidgetItem(QIcon("images/process.png"), "process", listWidget);	QListWidgetItem* lst5 = new QListWidgetItem(QIcon("images/printer.png"), "printer", listWidget);	listWidget->insertItem(1, lst1);	listWidget->insertItem(2, lst2);	listWidget->insertItem(3, lst3);	listWidget->insertItem(4, lst4);	listWidget->insertItem(5, lst5);	listWidget->show();	layout->addWidget(listWidget);	widget->setLayout(layout);	widget->show();	app.exec();	}

运行如下图：

第3个例子：

[cpp] view plain copyprint?#include <QApplication> #include <QWidget> #include <QHBoxLayout> #include <QListWidget> #include <QListWidgetItem> #include <QLabel> int main(int argc, char** argv) { QApplication app(argc, argv); QWidget* widget = new QWidget; QListWidget* listWidget = new QListWidget; QHBoxLayout* layout = new QHBoxLayout; QLabel* label = new QLabel; label->setFixedWidth(100); QListWidgetItem* lst1 = new QListWidgetItem(QIcon("images/data.png"), "data", listWidget); QListWidgetItem* lst2 = new QListWidgetItem(QIcon("images/decision.png"), "decision", listWidget); QListWidgetItem* lst3 = new QListWidgetItem(QIcon("images/document.png"), "document", listWidget); QListWidgetItem* lst4 = new QListWidgetItem(QIcon("images/process.png"), "process", listWidget); QListWidgetItem* lst5 = new QListWidgetItem(QIcon("images/printer.png"), "printer", listWidget); listWidget->insertItem(1, lst1); listWidget->insertItem(2, lst2); listWidget->insertItem(3, lst3); listWidget->insertItem(4, lst4); listWidget->insertItem(5, lst5); QObject::connect(listWidget, SIGNAL(currentTextChanged(const QString &)), label, SLOT(setText(const QString &))); listWidget->show(); layout->addWidget(listWidget); layout->addWidget(label); widget->setLayout(layout); widget->show(); app.exec(); }

#include <QApplication>#include <QWidget>#include <QHBoxLayout>#include <QListWidget>#include <QListWidgetItem>#include <QLabel>int main(int argc, char** argv){	QApplication app(argc, argv);	QWidget* widget = new QWidget;	QListWidget* listWidget = new QListWidget;	QHBoxLayout* layout = new QHBoxLayout;	QLabel* label = new QLabel;	label->setFixedWidth(100);	QListWidgetItem* lst1 = new QListWidgetItem(QIcon("images/data.png"), "data", listWidget);	QListWidgetItem* lst2 = new QListWidgetItem(QIcon("images/decision.png"), "decision", listWidget);	QListWidgetItem* lst3 = new QListWidgetItem(QIcon("images/document.png"), "document", listWidget);	QListWidgetItem* lst4 = new QListWidgetItem(QIcon("images/process.png"), "process", listWidget);	QListWidgetItem* lst5 = new QListWidgetItem(QIcon("images/printer.png"), "printer", listWidget);	listWidget->insertItem(1, lst1);	listWidget->insertItem(2, lst2);	listWidget->insertItem(3, lst3);	listWidget->insertItem(4, lst4);	listWidget->insertItem(5, lst5);	QObject::connect(listWidget, SIGNAL(currentTextChanged(const QString &)), label, SLOT(setText(const QString &)));	listWidget->show();	layout->addWidget(listWidget);	layout->addWidget(label);	widget->setLayout(layout);	widget->show();	app.exec();	}

运行如下图：