基于QT的電子相冊設(shè)計(jì)

1、.基于QT的電子相冊設(shè)計(jì)一、設(shè)計(jì)內(nèi)容及要求：1）能從存儲卡中讀取圖像文件，并在LCD屏上顯示圖像文件，支持多種主流格式；2）顯示時(shí)間、日期；3）通過按鈕或觸摸屏進(jìn)行操作。二、設(shè)計(jì)目的1）了解Linux嵌入式2）了解QT的設(shè)計(jì)過程3）了解PC機(jī)和開發(fā)板之間的通信三、設(shè)計(jì)工具PC機(jī)、開發(fā)板四、設(shè)計(jì)過程1、功能模塊結(jié)構(gòu)架構(gòu)圖功能模塊圖片瀏覽模塊圖片播放模塊系統(tǒng)設(shè)計(jì)模塊2、具體功能模塊架構(gòu)圖圖片瀏覽模塊圖像正旋圖像反旋圖像放大圖像縮小上一張圖片下一張圖片圖像播放和系統(tǒng)設(shè)計(jì)模塊選擇加載圖片圖片播放4、基于QT的圖像界面設(shè)計(jì)顯示5、用戶界面層代碼設(shè)計(jì)#include "mainwindow.h&

2、quot;#include "ui_mainwindow.h"MainWindow:MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui:MainWindow) ui->setupUi(this); /init data image_sum = 0; image_index = 0; timer_second = 1000; /default 1s disp_angle = 0; disp_width = 281; disp_height = 211; disp_xratio = 1.0;disp_y

3、ratio = 1.0;/timer timer = new QTimer; /label label = new QLabel; ui->scrollArea->setWidget(label); ui->scrollArea->setAlignment(Qt:AlignCenter); /connect timout function connect(timer,SIGNAL(timeout(),this,SLOT(disp_timeout(); return;MainWindow:MainWindow() delete ui;6、用戶圖形界面的按鈕功能實(shí)現(xiàn)代碼vo

4、id MainWindow:disp_timeout(void) image_show(); image_jump_to_next(); return;void MainWindow:image_jump_to_next() /check error if(0=image_sum) return; image_index+; if(image_index>=image_sum) image_index = 0; return;void MainWindow:image_jump_to_prev() /check error if(0=image_sum) return; image_in

5、dex-; if(image_index<0) image_index = image_sum-1; return;void MainWindow:image_show(void) /check error if(0=image_sum) return; if(image_index>=image_sum |image_index<0) image_index = 0; /load iamge pix.load(image_listimage_index); /rotate image if(disp_angle!=0) QMatrix matrix; matrix.rota

6、te(disp_angle); pix = pix.transformed(matrix,Qt:FastTransformation); /scale image long image_width = pix.width(); long image_height = pix.height(); if(image_width*disp_height>image_height*disp_width) image_height *= (disp_width/(double)image_width); image_width *= (disp_width/(double)image_width)

7、; else image_width *= (disp_height/(double)image_height); image_height *= (disp_height/(double)image_height); image_width *= disp_xratio; image_height *= disp_yratio; pix = pix.scaled(image_width, image_height,Qt:KeepAspectRatio); /set image label->setPixmap(pix); return;void MainWindow:on_pushBu

8、tton_add_clicked(void) long k=0; /file iterator QStringList:Iterator it; /file list QStringList list; /open dialog and add image files list = QFileDialog:getOpenFileNames(this," ","/","*.*"); for(it=list.begin();it<list.end();it+) image_listk=*it; k+; if(k=0) return;

9、 /save number of images image_sum = k; image_index = 0; disp_xratio = 1.0; disp_yratio = 1.0; disp_angle = 0; /start timer timer->start(timer_second); this->image_show(); return;void MainWindow:on_pushButton_stop_clicked() timer->stop(); return;void MainWindow:on_pushButton_play_clicked() t

10、imer->start();void MainWindow:on_pushButton_prev_clicked() /check error if(0 = image_sum) return; /stop display timer timer->stop();/jump to prev image image_jump_to_prev();/show image image_show(); return;void MainWindow:on_pushButton_next_clicked() /check error if(0 = image_sum) return; /sto

11、p display timer timer->stop(); /jump to next image image_jump_to_next();/show image image_show(); return;void MainWindow:on_pushButton_zoomin_clicked() disp_xratio += 0.05; disp_yratio += 0.05; image_show(); return;void MainWindow:on_pushButton_zoomout_clicked() if(disp_xratio>0.05)disp_xratio

12、 -= 0.05; if(disp_yratio>0.05)disp_yratio -= 0.05; image_show(); return;void MainWindow:on_pushButton_clockwise_clicked() disp_angle += 90; image_show(); return;void MainWindow:on_pushButton_anticlockwise_clicked() disp_angle -= 90; image_show(); return;7、功能模塊實(shí)現(xiàn)代碼：#include "image.h"#inc

13、lude "ui_image.h"int i=0;int j;/QString ima5=":/1.PNG",":/2.PNG",":/3.PNG",":/4.PNG",":/5.PNG"QString imagelist1000;QStringList:Iterator it;/迭代器的對象，類似指針但不是指針image:image(QWidget *parent) : QWidget(parent), ui(new Ui:image) ui->setupUi(thi

14、s); /給窗體設(shè)置背景圖片 QImage image1; image1.load(":/6.PNG"); /括號內(nèi)為圖片的相對目錄 QImage image2 = image1.scaled(320,240); QPalette palette;/定義窗口 palette.setBrush(this->backgroundRole(),QBrush(image2); this->setPalette(palette);/在定義的窗口顯示 timer = new QTimer; label = new QLabel;/不報(bào)錯(cuò)但運(yùn)行不出，頭文件聲明必須初始化 /m

15、atrix= new QMatrix; connect(timer,SIGNAL(timeout(),this,SLOT(imageshow(); ui->scrollArea->setWidget(label);/用scrollArea作為label的窗口 / ui->label->setAlignment(Qt:AlignCenter); ui->scrollArea->setAlignment(Qt:AlignCenter);void image:imageshow() pix.load(imagelisti); label->setPixmap

16、(pix); i+; if(i>j) i=0; image:image() delete ui;void image:on_pushButton_clicked() timer->start(1000); pix.load(imagelisti); label->setPixmap(pix); i+; if(i>j) i=0; void image:on_Pause_clicked() timer->stop();void image:on_UP_clicked() timer->stop(); i+; if (i=j) i=0; pix.load(imag

17、elisti); label->setPixmap(pix);void image:on_pushButton_2_clicked() timer->stop(); i-; if(i=0) i=j; pix.load(imagelisti); label->setPixmap(pix);void image:on_Open_clicked() int k = 0; QStringList list = QFileDialog:getOpenFileNames(this,"選擇圖片","/","*.*"); for(i

18、t=list.begin();it<list.end();it+) imagelistk=*it; qDebug()<<imagelistk; k+; j=k-1; timer->start(1000); pix.load(imagelisti); label->setPixmap(pix);void image:on_fangda_clicked() timer->stop(); double w=pix.width(); double h=pix.height(); pix = pix.scaled(w*1.05,h*1.05,Qt:KeepAspectRatio); label->setPixmap(pix);void image:on_suoxiao_clicked() timer->stop(); double w=pix.width(); double h=pix.height(); pix = pix.scaled(w*.95,h*.95,Qt:KeepAspectRatio); label->setPixmap(pix);void image:on