Qt簡(jiǎn)單實(shí)現(xiàn)密碼器控件

第Qt簡(jiǎn)單實(shí)現(xiàn)密碼器控件本文實(shí)例為大家分享了Qt自定義一個(gè)密碼器控件的簡(jiǎn)單實(shí)現(xiàn)代碼，供大家參考，具體內(nèi)容如下

實(shí)現(xiàn)構(gòu)思：

密碼器的功能可以看成是計(jì)算器和登陸界面的組合，所以在實(shí)現(xiàn)功能的過(guò)程中借鑒了大神的計(jì)算器的實(shí)現(xiàn)代碼和登陸界面實(shí)現(xiàn)的代碼。

實(shí)現(xiàn)的效果：

關(guān)于密碼器控件的不足：

窗口的標(biāo)題欄不夠漂亮，但是由于對(duì)時(shí)間長(zhǎng)度和任務(wù)進(jìn)度的權(quán)衡，下次一定進(jìn)行重繪。

代碼思路：

由于我司不用樣式表，所以背景由貼圖函數(shù)完成。在widget中添加按鈕控件和文本編輯控件。使用布局函數(shù)進(jìn)行布局，在加上一些簡(jiǎn)單的邏輯處理功能即可。

首先創(chuàng)建一個(gè)工程文件，添加新文件，選擇qt設(shè)計(jì)師界面類，如下：

進(jìn)入創(chuàng)建的ui界面后，添加控件進(jìn)行布局，單一的使用了珊格布局，如下:

在自定義控件的布局中遇到了一些與布局相關(guān)的問(wèn)題：

問(wèn)題1：如何改變布局內(nèi)控件的大??？ui中修改方式如下，純代碼實(shí)現(xiàn)也可以去幫助手冊(cè)中查找相同的接口函數(shù)。

問(wèn)題2：布局中控件的位置如何進(jìn)行更改？

*ui-gridLayout-setContentsMargins(QMargins(10,60,0,0));

ui-gridLayout-setVerticalSpacing(10);*

具體size，自行可以調(diào)整到比較合適的位置。

源碼實(shí)現(xiàn)：

calculaterform.h

#defineCALCULATERFORM_H

#include"calacutorbutton.h"

#includeQWidget

#includeQLineEdit

namespaceUi{

classCalculaterForm;

classCalculaterForm:publicQWidget

Q_OBJECT

public:

explicitCalculaterForm(QWidget*parent=nullptr);

~CalculaterForm();

void

addLineEdit();

voidaddBackImg();//可以進(jìn)行提供一個(gè)背景圖片

privateslots:

voidon_pushButton_clicked(boolchecked);

voidon_pushButton_2_clicked(boolchecked);

voidon_pushButton_3_clicked(boolchecked);

voidon_pushButton_4_clicked(boolchecked);

voidon_pushButton_5_clicked(boolchecked);

voidon_pushButton_6_clicked(boolchecked);

voidon_pushButton_7_clicked(boolchecked);

voidon_pushButton_8_clicked(boolchecked);

voidon_pushButton_9_clicked(boolchecked);

voidon_pushButton_10_clicked(boolchecked);

voidon_pushButton_11_clicked(boolchecked);

voidon_pushButton_12_clicked(boolchecked);

voidon_pushButton_13_clicked(boolchecked);

voidon_pushButton_15_clicked(boolchecked);

voidon_pushButton_14_clicked(boolchecked);

private:

Ui::CalculaterForm*ui;

floatmNum1,mNum2,mResult;

charmSign;

intmMark;

QStringmKeyStr="0000";//密碼字符串

QStringS;

QLineEdit*mLineEdit;

#endif//CALCULATERFORM_H

calculaterform.cpp

#include"calculaterform.h"

#include"ui_calculaterform.h"

#includeQLineEdit

#includeQDebug

#includeQMessageBox

CalculaterForm::CalculaterForm(QWidget*parent):

QWidget(parent),

ui(newUi::CalculaterForm)

ui-setupUi(this);

mNum1=0.0;

mNum2=0.0;

mResult=0.0;

S="";

mMark=1;

ui-pushButton_13-setMyIcon("/home/rabbitchenc/Image/dialog_cancel.png");

ui-pushButton_14-setMyIcon("/home/rabbitchenc/Image/ime_icon_del.png");

ui-pushButton_15-setMyIcon("/home/rabbitchenc/Image/dialog_ok.png");

mLineEdit=newQLineEdit(this);

setFixedSize(width(),height());

ui-gridLayout-setContentsMargins(QMargins(10,60,0,0));

ui-gridLayout-setVerticalSpacing(10);

addBackImg();

addLineEdit();

ui-pushButton_10-setEnabled(false);

ui-pushButton_12-setEnabled(false);

//添加文本編輯

void

CalculaterForm::addLineEdit()

if(mLineEdit!=nullptr){

mLineEdit-resize(width(),40);

mLineEdit-setStyleSheet("background:transparent;border-width:0;border-style:outset");

mLineEdit-setAlignment(Qt::AlignHCenter);

mLineEdit-setEchoMode(QLineEdit::Password);

}

//添加背景圖片

voidCalculaterForm::addBackImg()

QStringfilename="/home/rabbitchenc/Image/ime_bg.png";

QPixmappixmap(filename);

QPalettepal;

pixmap=pixmap.scaled(width(),height());

pal.setBrush(QPalette::Window,QBrush(pixmap));

setPalette(pal);

CalculaterForm::~CalculaterForm()

deleteui;

voidCalculaterForm::on_pushButton_clicked(boolchecked)

S+="1";

mLineEdit-setText(S);

voidCalculaterForm::on_pushButton_2_clicked(boolchecked)

S+="2";

mLineEdit-setText(S);

voidCalculaterForm::on_pushButton_3_clicked(boolchecked)

S+="3";

mLineEdit-setText(S);

voidCalculaterForm::on_pushButton_4_clicked(boolchecked)

S+="4";

mLineEdit-setText(S);

voidCalculaterForm::on_pushButton_5_clicked(boolchecked)

S+="5";

mLineEdit-setText(S);

voidCalculaterForm::on_pushButton_6_clicked(boolchecked)

S+="6";

mLineEdit-setText(S);

voidCalculaterForm::on_pushButton_7_clicked(boolchecked)

S+="7";

mLineEdit-setText(S);

voidCalculaterForm::on_pushButton_8_clicked(boolchecked)

S+="8";

mLineEdit-setText(S);

voidCalculaterForm::on_pushButton_9_clicked(boolchecked)

S+="9";

mLineEdit-setText(S);

voidCalculaterForm::on_pushButton_10_clicked(boolchecked)

voidCalculaterForm::on_pushButton_11_clicked(boolchecked)

S+="0";

mLineEdit-setText(S);

voidCalculaterForm::on_pushButton_12_clicked(boolchecked)

voidCalculaterForm::on_pushButton_13_clicked(boolchecked)

this-close();

voidCalculaterForm::on_pushButton_15_clicked(boolchecked)

if(S==mKeyStr)

{

qDebug()"right";

this-close();

}else{

qDebug()"false";

QMessageBox*messageBox=newQMessageBox(QMessageBox::Warning,"錯(cuò)誤提示","密碼錯(cuò)誤");

messageBox-show();

}

voidCalculaterForm::on_pushButton_14_clicked(boolchecked)

S=S.left(S.length()-1);

mLineEdit-setText(S);

}

自定義的按鈕源碼：

calacutorbutton.h

#ifndefCALACUTORBUTTON_H

#defineCALACUTORBUTTON_H

#includeQPushButton

classCalacutorButton:publicQPushButton

Q_OBJECT

public:

explicitCalacutorButton(QWidget*parent=nullptr);

~CalacutorButton();

voidsetText(constQStringtext);

voidsetMyIcon(constQStringicon);

voidsetImageName(constQStringimg);

voidsetPressImg(constQStringimg);

protected:

voidpaintEvent(QPaintEvent*event);

voiddrawText(QPainter*painter);

voiddrawImage(QPainter*painter);

voiddrawIcon(QPainter*painter);

QPixmap*ninePatch(QStringpicName,doubleiHorzSplit,doubleiVertSplit,doubleDstWidth,doubleDstHeight);

QPixmapgeneratePixmap(constQPixmapimg_in,intradius1,intradius2);

private:

QString

mFileName;

QStringmPressImgN