有的时候设计的是触摸界面，需要虚拟键盘。QT5里面自带了一个虚拟键盘，但总是用不明白。自己写了一个，开源出来，分享给大家。声明一个对象就可以直接用了
keyboard.h
//为了让点击右效果显示，设置了样式表的切换。自己用的时候可以根据情况修改
#ifndef KEYBOARD_H
#define KEYBOARD_H
#include <QDialog>
#include <QLineEdit>
namespace Ui {
class KeyBoard;
}
class KeyBoard : public QDialog
{
Q_OBJECT
public:
explicit KeyBoard(QWidget *parent = nullptr);
~KeyBoard();
void setLineEditObj(QLineEdit* lineEdit);
QLineEdit* edit;
private:
Ui::KeyBoard *ui;
private slots:
void key_0Pressed();
void key_1Pressed();
void key_2Pressed();
void key_3Pressed();
void key_4Pressed();
void key_5Pressed();
void key_6Pressed();
void key_7Pressed();
void key_8Pressed();
void key_9Pressed();
void key_DotPressed();
void key_BackPressed();
void key_EnterPressed();
};
#endif // KEYBOARD_H
keyboard.cpp
#include "keyboard.h"
#include "ui_keyboard.h"
#include <QTime>
KeyBoard::KeyBoard(QWidget *parent) :
QDialog(parent),
ui(new Ui::KeyBoard)
{
ui->setupUi(this);
this->setWindowTitle("");
this->edit = nullptr;//初始化把edit清空
//this->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
this->setWindowFlags(Qt::WindowStaysOnTopHint);
edit = new QLineEdit();
connect(this->ui->P_key0, &QPushButton::clicked, this, &KeyBoard::key_0Pressed);
connect(this->ui->P_key1, &QPushButton::clicked, this, &KeyBoard::key_1Pressed);
connect(this->ui->P_key2, &QPushButton::clicked, this, &KeyBoard::key_2Pressed);
connect(this->ui->P_key3, &QPushButton::clicked, this, &KeyBoard::key_3Pressed);
connect(this->ui->P_key4, &QPushButton::clicked, this, &KeyBoard::key_4Pressed);
connect(this->ui->P_key5, &QPushButton::clicked, this, &KeyBoard::key_5Pressed);
connect(this->ui->P_key6, &QPushButton::clicked, this, &KeyBoard::key_6Pressed);
connect(this->ui->P_key7, &QPushButton::clicked, this, &KeyBoard::key_7Pressed);
connect(this->ui->P_key8, &QPushButton::clicked, this, &KeyBoard::key_8Pressed);
connect(this->ui->P_key9, &QPushButton::clicked, this, &KeyBoard::key_9Pressed);
connect(this->ui->P_dot, &QPushButton::clicked, this, &KeyBoard::key_DotPressed);
connect(this->ui->P_back, &QPushButton::clicked, this, &KeyBoard::key_BackPressed);
connect(this->ui->P_sure, &QPushButton::clicked, this, &KeyBoard::key_EnterPressed);
}
KeyBoard::~KeyBoard()
{
delete ui;
}
void KeyBoard::key_0Pressed()
{
this->ui->P_key0->setStyleSheet("QPushButton{border-image: url(:/tubiao/14.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
//使用等待效果，让图标变换有显示
QTime dieTime= QTime::currentTime().addMSecs(300);
while (QTime::currentTime() < dieTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
this->ui->D_lineEdit->setText(this->ui->D_lineEdit->text() + "0");
this->ui->P_key0->setStyleSheet("QPushButton{border-image: url(:/tubiao/10.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
}
void KeyBoard::setLineEditObj(QLineEdit* lineEdit)
{
this->edit = lineEdit;
}
void KeyBoard::key_1Pressed()
{
this->ui->P_key1->setStyleSheet("QPushButton{border-image: url(:/tubiao/14.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
//使用等待效果，让图标变换有显示
QTime dieTime= QTime::currentTime().addMSecs(300);
while (QTime::currentTime() < dieTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
this->ui->D_lineEdit->setText(this->ui->D_lineEdit->text() + "1");
this->ui->P_key1->setStyleSheet("QPushButton{border-image: url(:/tubiao/10.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
}
void KeyBoard::key_2Pressed()
{
this->ui->P_key2->setStyleSheet("QPushButton{border-image: url(:/tubiao/14.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
//使用等待效果，让图标变换有显示
QTime dieTime= QTime::currentTime().addMSecs(300);
while (QTime::currentTime() < dieTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
this->ui->D_lineEdit->setText(this->ui->D_lineEdit->text() + "2");
this->ui->P_key2->setStyleSheet("QPushButton{border-image: url(:/tubiao/10.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
}
void KeyBoard::key_3Pressed()
{
this->ui->P_key3->setStyleSheet("QPushButton{border-image: url(:/tubiao/14.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
//使用等待效果，让图标变换有显示
QTime dieTime= QTime::currentTime().addMSecs(300);
while (QTime::currentTime() < dieTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
this->ui->D_lineEdit->setText(this->ui->D_lineEdit->text() + "3");
this->ui->P_key3->setStyleSheet("QPushButton{border-image: url(:/tubiao/10.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
}
void KeyBoard::key_4Pressed()
{
this->ui->P_key4->setStyleSheet("QPushButton{border-image: url(:/tubiao/14.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
//使用等待效果，让图标变换有显示
QTime dieTime= QTime::currentTime().addMSecs(300);
while (QTime::currentTime() < dieTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
this->ui->D_lineEdit->setText(this->ui->D_lineEdit->text() + "4");
this->ui->P_key4->setStyleSheet("QPushButton{border-image: url(:/tubiao/10.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
}
void KeyBoard::key_5Pressed()
{
this->ui->P_key5->setStyleSheet("QPushButton{border-image: url(:/tubiao/14.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
//使用等待效果，让图标变换有显示
QTime dieTime= QTime::currentTime().addMSecs(300);
while (QTime::currentTime() < dieTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
this->ui->D_lineEdit->setText(this->ui->D_lineEdit->text() + "5");
this->ui->P_key5->setStyleSheet("QPushButton{border-image: url(:/tubiao/10.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
}
void KeyBoard::key_6Pressed()
{
this->ui->P_key6->setStyleSheet("QPushButton{border-image: url(:/tubiao/14.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
//使用等待效果，让图标变换有显示
QTime dieTime= QTime::currentTime().addMSecs(300);
while (QTime::currentTime() < dieTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
this->ui->D_lineEdit->setText(this->ui->D_lineEdit->text() + "6");
this->ui->P_key6->setStyleSheet("QPushButton{border-image: url(:/tubiao/10.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
}
void KeyBoard::key_7Pressed()
{
this->ui->P_key7->setStyleSheet("QPushButton{border-image: url(:/tubiao/14.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
//使用等待效果，让图标变换有显示
QTime dieTime= QTime::currentTime().addMSecs(300);
while (QTime::currentTime() < dieTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
this->ui->D_lineEdit->setText(this->ui->D_lineEdit->text() + "7");
this->ui->P_key7->setStyleSheet("QPushButton{border-image: url(:/tubiao/10.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
}
void KeyBoard::key_8Pressed()
{
this->ui->P_key8->setStyleSheet("QPushButton{border-image: url(:/tubiao/14.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
//使用等待效果，让图标变换有显示
QTime dieTime= QTime::currentTime().addMSecs(300);
while (QTime::currentTime() < dieTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
this->ui->D_lineEdit->setText(this->ui->D_lineEdit->text() + "8");
this->ui->P_key8->setStyleSheet("QPushButton{border-image: url(:/tubiao/10.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
}
void KeyBoard::key_9Pressed()
{
this->ui->P_key9->setStyleSheet("QPushButton{border-image: url(:/tubiao/14.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
//使用等待效果，让图标变换有显示
QTime dieTime= QTime::currentTime().addMSecs(300);
while (QTime::currentTime() < dieTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
this->ui->D_lineEdit->setText(this->ui->D_lineEdit->text() + "9");
this->ui->P_key9->setStyleSheet("QPushButton{border-image: url(:/tubiao/10.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
}
void KeyBoard::key_DotPressed()
{
this->ui->P_dot->setStyleSheet("QPushButton{border-image: url(:/tubiao/14.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
//使用等待效果，让图标变换有显示
QTime dieTime= QTime::currentTime().addMSecs(300);
while (QTime::currentTime() < dieTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
this->ui->D_lineEdit->setText(this->ui->D_lineEdit->text() + ".");
this->ui->P_dot->setStyleSheet("QPushButton{border-image: url(:/tubiao/10.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
}
void KeyBoard::key_BackPressed()
{
this->ui->P_back->setStyleSheet("QPushButton{border-image: url(:/tubiao/14.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
//使用等待效果，让图标变换有显示
QTime dieTime= QTime::currentTime().addMSecs(300);
while (QTime::currentTime() < dieTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
this->ui->D_lineEdit->setText(this->ui->D_lineEdit->text()
.left(this->ui->D_lineEdit->text().length() - 1 > 0 ? this->ui->D_lineEdit->text().length() - 1 : 0));
this->ui->P_back->setStyleSheet("QPushButton{border-image: url(:/tubiao/10.png);color: rgb(255, 255, 255);font: 75 15pt Arial;}");
}
void KeyBoard::key_EnterPressed()
{
this->ui->P_sure->setStyleSheet("QPushButton{border-image: url(:/tubiao/14.png);color: rgb(255, 255, 255);font: 75 15pt Arial;}");
//使用等待效果，让图标变换有显示
QTime dieTime= QTime::currentTime().addMSecs(300);
while (QTime::currentTime() < dieTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
this->edit->setText(this->ui->D_lineEdit->text());
this->ui->D_lineEdit->clear();
//this->edit = nullptr;
this->close();
this->ui->P_sure->setStyleSheet("QPushButton{border-image: url(:/tubiao/10.png);color: rgb(255, 255, 255);font: 10pt Arial;}");
}
keyboard.ui
ui文件代码没用，直接用图形化的方式生成的，把整体效果，和空间命名贴出来了：
整体效果图如下：
控件命名结构如下：
