這個IP地址輸入框控件,估計寫爛了,網上隨便一搜索,保證一大堆,估計也是由於這個控件太容易了,很是適合新手練手,通常的思路都是用4個qlineedit控件拼起來,而後每一個輸入框設置正則表達式過濾只能輸入3位數字,而後安裝事件過濾器識別回車自動跳到下一個輸入框。關於如何設置正則表達式過濾,這個能夠搜索查到,本人也不大懂這個規則,貌似還有專門的書籍專門介紹正則表達式,可能這塊很是強大。linux
開源地址:https://gitee.com/feiyangqingyun/QWidgetDemo https://github.com/feiyangqingyun/QWidgetDemoc++
#ifndef IPADDRESS_H #define IPADDRESS_H /** * IP地址輸入框控件 做者:feiyangqingyun(QQ:517216493) 2017-8-11 * 1:可設置IP地址,自動填入框 * 2:可清空IP地址 * 3:支持按下小圓點自動切換 * 4:支持退格鍵自動切換 * 5:支持IP地址過濾 * 6:可設置背景色/邊框顏色/邊框圓角角度 */ #include <QWidget> class QLabel; class QLineEdit; #ifdef quc #if (QT_VERSION < QT_VERSION_CHECK(5,7,0)) #include <QtDesigner/QDesignerExportWidget> #else #include <QtUiPlugin/QDesignerExportWidget> #endif class QDESIGNER_WIDGET_EXPORT IPAddress : public QWidget #else class IPAddress : public QWidget #endif { Q_OBJECT Q_PROPERTY(QString ip READ getIP WRITE setIP) public: explicit IPAddress(QWidget *parent = 0); protected: bool eventFilter(QObject *watched, QEvent *event); private: QLabel *labDot1; //第一個小圓點 QLabel *labDot2; //第二個小圓點 QLabel *labDot3; //第三個小圓點 QLineEdit *txtIP1; //IP地址網段輸入框1 QLineEdit *txtIP2; //IP地址網段輸入框2 QLineEdit *txtIP3; //IP地址網段輸入框3 QLineEdit *txtIP4; //IP地址網段輸入框4 QString ip; //IP地址 QString bgColor; //背景顏色 QString borderColor;//邊框顏色 int borderRadius; //邊框圓角角度 private slots: void textChanged(const QString &text); public: //獲取IP地址 QString getIP() const; QSize sizeHint() const; QSize minimumSizeHint() const; public Q_SLOTS: //設置IP地址 void setIP(const QString &ip); //清空 void clear(); //設置背景顏色 void setBgColor(const QString &bgColor); //設置邊框顏色 void setBorderColor(const QString &borderColor); //設置邊框圓角角度 void setBorderRadius(int borderRadius); }; #endif // IPADDRESS_H
#pragma execution_character_set("utf-8") #include "ipaddress.h" #include "qlabel.h" #include "qlineedit.h" #include "qboxlayout.h" #include "qregexp.h" #include "qvalidator.h" #include "qevent.h" #include "qdebug.h" IPAddress::IPAddress(QWidget *parent) : QWidget(parent) { bgColor = "#FFFFFF"; borderColor = "#A6B5B8"; borderRadius = 3; //用於顯示小圓點的標籤,居中對齊 labDot1 = new QLabel; labDot1->setAlignment(Qt::AlignCenter); labDot1->setText("."); labDot2 = new QLabel; labDot2->setAlignment(Qt::AlignCenter); labDot2->setText("."); labDot3 = new QLabel; labDot3->setAlignment(Qt::AlignCenter); labDot3->setText("."); //用於輸入IP地址的文本框,居中對齊 txtIP1 = new QLineEdit; txtIP1->setObjectName("txtIP1"); txtIP1->setAlignment(Qt::AlignCenter); txtIP1->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding); connect(txtIP1, SIGNAL(textChanged(QString)), this, SLOT(textChanged(QString))); txtIP2 = new QLineEdit; txtIP2->setObjectName("txtIP2"); txtIP2->setAlignment(Qt::AlignCenter); txtIP2->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding); connect(txtIP2, SIGNAL(textChanged(QString)), this, SLOT(textChanged(QString))); txtIP3 = new QLineEdit; txtIP3->setObjectName("txtIP3"); txtIP3->setAlignment(Qt::AlignCenter); txtIP3->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding); connect(txtIP3, SIGNAL(textChanged(QString)), this, SLOT(textChanged(QString))); txtIP4 = new QLineEdit; txtIP4->setObjectName("txtIP4"); txtIP4->setAlignment(Qt::AlignCenter); txtIP4->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding); connect(txtIP4, SIGNAL(textChanged(QString)), this, SLOT(textChanged(QString))); //設置IP地址校驗過濾 QRegExp regExp("(2[0-5]{2}|2[0-4][0-9]|1?[0-9]{1,2})"); QRegExpValidator *validator = new QRegExpValidator(regExp, this); txtIP1->setValidator(validator); txtIP2->setValidator(validator); txtIP3->setValidator(validator); txtIP4->setValidator(validator); //綁定事件過濾器,識別鍵盤按下 txtIP1->installEventFilter(this); txtIP2->installEventFilter(this); txtIP3->installEventFilter(this); txtIP4->installEventFilter(this); QFrame *frame = new QFrame; frame->setObjectName("frameIP"); QStringList qss; qss.append(QString("QFrame#frameIP{border:1px solid %1;border-radius:%2px;}").arg(borderColor).arg(borderRadius)); qss.append(QString("QLabel{min-width:15px;background-color:%1;}").arg(bgColor)); qss.append(QString("QLineEdit{background-color:%1;border:none;}").arg(bgColor)); qss.append(QString("QLineEdit#txtIP1{border-top-left-radius:%1px;border-bottom-left-radius:%1px;}").arg(borderRadius)); qss.append(QString("QLineEdit#txtIP4{border-top-right-radius:%1px;border-bottom-right-radius:%1px;}").arg(borderRadius)); frame->setStyleSheet(qss.join("")); QVBoxLayout *verticalLayout = new QVBoxLayout(this); verticalLayout->setMargin(0); verticalLayout->setSpacing(0); verticalLayout->addWidget(frame); //將控件按照橫向佈局排列 QHBoxLayout *layout = new QHBoxLayout(frame); layout->setMargin(0); layout->setSpacing(0); layout->addWidget(txtIP1); layout->addWidget(labDot1); layout->addWidget(txtIP2); layout->addWidget(labDot2); layout->addWidget(txtIP3); layout->addWidget(labDot3); layout->addWidget(txtIP4); } bool IPAddress::eventFilter(QObject *watched, QEvent *event) { if (event->type() == QEvent::KeyPress) { QLineEdit *txt = (QLineEdit *)watched; if (txt == txtIP1 || txt == txtIP2 || txt == txtIP3 || txt == txtIP4) { QKeyEvent *key = (QKeyEvent *)event; //若是當前按下了小數點則移動焦點到下一個輸入框 if (key->text() == ".") { this->focusNextChild(); } //若是按下了退格鍵而且當前文本框已經沒有了內容則焦點往前移 if (key->key() == Qt::Key_Backspace) { if (txt->text().length() <= 1) { this->focusNextPrevChild(false); } } } } return QWidget::eventFilter(watched, event); } void IPAddress::textChanged(const QString &text) { int len = text.length(); int value = text.toInt(); //判斷當前是否輸入完成一個網段,是的話則自動移動到下一個輸入框 if (len == 3) { if (value >= 100 && value <= 255) { this->focusNextChild(); } } //拼接成完整IP地址 ip = QString("%1.%2.%3.%4").arg(txtIP1->text()).arg(txtIP2->text()).arg(txtIP3->text()).arg(txtIP4->text()); } QString IPAddress::getIP() const { return this->ip; } QSize IPAddress::sizeHint() const { return QSize(250, 20); } QSize IPAddress::minimumSizeHint() const { return QSize(30, 10); } void IPAddress::setIP(const QString &ip) { //先檢測IP地址是否合法 QRegExp regExp("((2[0-4]\\d|25[0-5]|[01]?\\d\\d?)\\.){3}(2[0-4]\\d|25[0-5]|[01]?\\d\\d?)"); if (!regExp.exactMatch(ip)) { return; } if (this->ip != ip) { this->ip = ip; //將IP地址填入各個網段 QStringList list = ip.split("."); txtIP1->setText(list.at(0)); txtIP2->setText(list.at(1)); txtIP3->setText(list.at(2)); txtIP4->setText(list.at(3)); } } void IPAddress::clear() { txtIP1->clear(); txtIP2->clear(); txtIP3->clear(); txtIP4->clear(); txtIP1->setFocus(); } void IPAddress::setBgColor(const QString &bgColor) { if (this->bgColor != bgColor) { this->bgColor = bgColor; } } void IPAddress::setBorderColor(const QString &borderColor) { if (this->borderColor != borderColor) { this->borderColor = borderColor; } } void IPAddress::setBorderRadius(int borderRadius) { if (this->borderRadius != borderRadius) { this->borderRadius = borderRadius; } }