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QT學(xué)習(xí)筆記-20.使用QT Designer開發(fā)UI

使用QT Designer設(shè)計軟件界面
使用過程沒什么說的

假定生成的ui文件如下:

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>Form</class>
<widget class="QWidget" name="Form">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>203</width>
    <height>177</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Form</string>
  </property>
  <widget class="QWidget" name="">
   <property name="geometry">
    <rect>
     <x>20</x>
     <y>20</y>
     <width>164</width>
     <height>139</height>
    </rect>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout_3">
    <item>
     <widget class="QLineEdit" name="lineEdit"/>
    </item>
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout">
      <item>
       <layout class="QVBoxLayout" name="verticalLayout_2">
        <item>
         <widget class="QPushButton" name="pushButton_7">
          <property name="text">
           <string>PushButton</string>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QPushButton" name="pushButton_5">
          <property name="text">
           <string>PushButton</string>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QPushButton" name="pushButton">
          <property name="text">
           <string>PushButton</string>
          </property>
         </widget>
        </item>
       </layout>
      </item>
      <item>
       <layout class="QVBoxLayout" name="verticalLayout">
        <item>
         <widget class="QPushButton" name="pushButton_2">
          <property name="text">
           <string>PushButton</string>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QPushButton" name="pushButton_8">
          <property name="text">
           <string>PushButton</string>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QPushButton" name="pushButton_4">
          <property name="text">
           <string>PushButton</string>
          </property>
         </widget>
        </item>
       </layout>
      </item>
     </layout>
    </item>
   </layout>
  </widget>
</widget>
<resources/>
<connections/>
</ui>

然后修改pro文件
加入對QUitools的鏈接

CONFIG += uitools

其main.cpp如下:

#include <QFile>
#include <QtGui/QApplication>
#include <QtGui/QWidget>
#include <QtGui/QLineEdit>
#include <QtUiTools/QuiLoader>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QUiLoader ui;
    QFile file("dlg.ui");
    QWidget* widget = ui.load(&file);
    if(widget)
    {
        widget->setWindowTitle("Dlg");
        QLineEdit* lineedit = widget->findChild<QLineEdit*>("lineEdit");
        lineedit->setStyleSheet("QLineEdit {background-color: yellow}");
        lineedit->setText("information.");
        widget->show();
    }
    return a.exec();
}

posted @ 2011-08-05 22:01 ccsdu2009 閱讀(940) | 評論 (0) | 編輯收藏

QT學(xué)習(xí)筆記-19 ScroolArea

#include <QtGui/QApplication>
#include <QtGui/QScrollArea>
#include "widget.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget *widget = new Widget;

    QScrollArea area;
    area.setWidget(widget);
    area.viewport()->setBackgroundRole(QPalette::Dark);
    area.viewport()->setAutoFillBackground(true);
    area.setWindowTitle("Icon Cool");
    area.show();

    return a.exec();
}

posted @ 2011-08-03 22:37 ccsdu2009 閱讀(474) | 評論 (0) | 編輯收藏

QT學(xué)習(xí)筆記-18 IconEditor

#include <QColor>
#include <QImage>
#include <QtGui/QWidget>

class Widget : public QWidget
{
    Q_OBJECT
    Q_PROPERTY(QColor penColor READ penColor WRITE setPenColor)
    Q_PROPERTY(QImage iconImage READ iconImage WRITE setIconImage)
    Q_PROPERTY(int zoomFactor READ zoomFactor WRITE setZoomFactor)
public:
    Widget(QWidget *parent = 0);
    ~Widget();

    void   setPenColor(const QColor& newColor);
    QColor penColor()const{return curColor;}
    void   setZoomFactor(int newZoom);
    int    zoomFactor()const{return zoom;}
    void   setIconImage(const QImage& image);
    QImage iconImage()const{return image;}
    QSize  sizeHint()const;
protected:
    void   mousePressEvent(QMouseEvent *event);
    void   mouseMoveEvent(QMouseEvent* event);
    void   paintEvent(QPaintEvent* event);
private:
    void   setImagePixel(const QPoint &pos,bool opaque);
    QRect  pixelRect(int i,int j)const;

    QColor curColor;
    QImage image;
    int    zoom;
};

#include <QtGui>

#include "widget.h"

Widget::Widget(QWidget *parent)

 : QWidget(parent)

 this->setAttribute(Qt::WA_StaticContents);

 this->setSizePolicy(QSizePolicy::Minimum,QSizePolicy::Minimum);

 this->curColor = Qt::black;

 this->zoom = 8;

 image = QImage(16,16,QImage::Format_ARGB32);

 image.fill(qRgba(0,0,0,0));

Widget::~Widget()

QSize Widget::sizeHint()const

 QSize size = zoom * image.size();

 if(zoom >= 3)

 size += QSize(1,1);

 return size;

void Widget::setPenColor(const QColor& newColor)

 curColor = newColor;

void Widget::setIconImage(const QImage& image)

 if(this->image != image)

 this->image = image.convertToFormat(QImage::Format_ARGB32);

 update();

 this->updateGeometry();

void Widget::paintEvent(QPaintEvent* event)

 QPainter painter(this);

 if(zoom >=3)

 painter.setPen(this->palette().foreground().color());

 for(int i = 0; i <= image.width();++i)

 painter.drawLine(zoom*i,0,zoom*i,zoom*image.height());

 for(int j = 0;j <= image.height();j++)

 painter.drawLine(0,zoom*j,zoom*image.width(),zoom*j);

 for(int i = 0; i < image.width();i++)

 for(int j = 0;j < image.height();j++)

 QRect rect = this->pixelRect(i,j);

 if(!event->region().intersect(rect).isEmpty())

 QColor color = QColor::fromRgba(image.pixel(i,j));

 if(color.alpha() < 255)

 painter.fillRect(rect,Qt::white);

 painter.fillRect(rect,color);

QRect Widget::pixelRect(int i, int j) const

 if(zoom >=3)

 return QRect(zoom*i+1,zoom*j+1,zoom-1,zoom-1);

 return QRect(zoom*i,zoom*j,zoom,zoom);

void Widget::mousePressEvent(QMouseEvent *event)

 if(event->button() == Qt::LeftButton)

 setImagePixel(event->pos(),true);

 else if(event->button() == Qt::RightButton)

 setImagePixel(event->pos(),false);

void Widget::mouseMoveEvent(QMouseEvent *event)

 if(event->buttons() & Qt::LeftButton)

 setImagePixel(event->pos(),true);

 else if(event->buttons() & Qt::RightButton)

 setImagePixel(event->pos(),false);

void Widget::setImagePixel(const QPoint &pos, bool opaque)

 int i = pos.x()/zoom;

 int j = pos.y()/zoom;

 if(image.rect().contains(i,j))

 if(opaque)

 image.setPixel(i,j,penColor().rgba());

 else

 image.setPixel(i,j,qRgba(0,0,0,0));

 this->update(this->pixelRect(i,j));

void Widget::setZoomFactor(int newZoom)

 if(newZoom < 1)

 newZoom = 1;

 if(newZoom != zoom)

 zoom = newZoom;

 update();

 updateGeometry();

幾點說明：
1.宏 Q_PROPERTY 聲明屬性讀寫屬性
2.setSizePolicy(.,.) 說明控件最小尺寸為推薦尺寸
3.sizeHint() 獲得控件推薦尺寸
4.控件 update()/updateGeometry()用于下次重繪和調(diào)整控件尺寸
5.在函數(shù)paintEvent中繪制圖元
6.一個控件的調(diào)色板有3個顏色組 激活，非激活，不可用

posted @ 2011-08-03 22:15 ccsdu2009 閱讀(1194) | 評論 (0) | 編輯收藏

QT學(xué)習(xí)筆記-17. QT拖放

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    edit = new QTextEdit;
    this->setCentralWidget(edit);
    setAcceptDrops(true);
    this->setWindowTitle(tr("Text Editor"));
}

MainWindow::~MainWindow()
{
}

void MainWindow::dragEnterEvent(QDragEnterEvent* event)
{
    if(event->mimeData()->hasFormat("text/uri-list"))
        event->acceptProposedAction();
}

void MainWindow::dropEvent(QDropEvent* event)
{
    QList<QUrl> uri = event->mimeData()->urls();
    if(uri.isEmpty())
        return;
    QString file = uri.first().toLocalFile();
    if(file.isEmpty())
        return;
    this->setWindowTitle(tr("%1 -- %2").arg(file).arg("Drag File"));
}

posted @ 2011-08-02 22:39 ccsdu2009 閱讀(537) | 評論 (0) | 編輯收藏

QT學(xué)習(xí)筆記-16.Dock控件

一個簡單的使用例子如下:

#include "mainwindow.h"
#include <QtGui/QDockWidget>
#include <QtGui/QTextEdit>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    QDockWidget* widget = new QDockWidget(tr("DockWidget"));
    QTextEdit* edit = new QTextEdit;
    widget->setWidget(edit);
    widget->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
    this->addDockWidget(Qt::LeftDockWidgetArea,widget);
}

MainWindow::~MainWindow()
{

}

需要說明的是僅MainWidow僅可設(shè)置Dock

posted @ 2011-08-02 22:16 ccsdu2009 閱讀(791) | 評論 (0) | 編輯收藏

QT學(xué)習(xí)筆記-15.窗體切分

#include <QtGui/QApplication>
#include <QtGui/QTextEdit>
#include <QtGui/QSplitter>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QTextEdit* text1 = NULL;
    QTextEdit* text2 = NULL;
    QSplitter* splitter;
    text1 = new QTextEdit;
    text2 = new QTextEdit;
    splitter = new QSplitter(Qt::Vertical);
    splitter->addWidget(text1);
    QTextEdit* text3 = new QTextEdit;
    QSplitter* sp1 = new QSplitter(Qt::Horizontal);
    splitter->addWidget(text2);
    splitter->setStretchFactor(1,1);
    sp1->addWidget(splitter);
    sp1->addWidget(text3);
    sp1->show();
    return a.exec();
}

posted @ 2011-08-02 21:52 ccsdu2009 閱讀(636) | 評論 (0) | 編輯收藏

QT學(xué)習(xí)筆記-14 程序啟動畫面

接上文
一個簡單的基于QT的程序啟動畫面代碼為:

#include <QtGui/QApplication>
#include <QtGui/QSplashScreen>
#include <QtGui/QPixmap>
#include "registerdlg.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QSplashScreen* splash = new QSplashScreen(QPixmap("DevCPP.bmp"));
    splash->show();

    RegisterDlg w;

    //! load some data

    Qt::Alignment topright = Qt::AlignRight | Qt::AlignTop;
    splash->showMessage(QObject::tr("Loading addins

"),topright,Qt::blue);

    //! load soma data

    for(int i = 0;i< 9999;i++)
        ;

    w.show();
    splash->finish(&w);
    delete splash;
    return a.exec();
}

posted @ 2011-08-01 22:16 ccsdu2009 閱讀(502) | 評論 (0) | 編輯收藏

QT學(xué)習(xí)筆記-13.一個簡單的用戶注冊對話框

還不太完善

#ifndef REGISTER_DLG_H
#define REGISTER_DLG_H

#include <QtGui/QDialog>
#include <QtGui/QVBoxLayout>
#include <QtGui/QHBoxLayout>
#include <QtGui/QGridLayout>
#include <QtGui/QLabel>
#include <QtGui/QLineEdit>
#include <QtGui/QPushButton>

class RegisterDlg : public QDialog
{
    Q_OBJECT
public:
    RegisterDlg(QWidget *parent = 0);
    ~RegisterDlg();
public slots:
    void checkRegister();
private:
    QVBoxLayout*  layout;
    QLabel*       label;
    QGridLayout*  gridlayout;
    QLabel*       namelabel;
    QLineEdit*    nameedit;
    QLabel*       codelabel;
    QLineEdit*    codeedit;
    QHBoxLayout*  hlayout;
    QPushButton*  confirm;
    QPushButton*  cancel;
};

#endif
//! ccsdu2004

cxx

#include <QtGui/QMessageBox>
#include "registerdlg.h"

RegisterDlg::RegisterDlg(QWidget *parent)
    : QDialog(parent)
{
    layout = new QVBoxLayout;
    label  = new QLabel(tr("Please input register info below"));
    layout->addWidget(label);
    gridlayout = new QGridLayout;
    namelabel  = new QLabel(tr("User Name"));
    nameedit   = new QLineEdit();
    codelabel  = new QLabel(tr("Register Code"));
    codeedit   = new QLineEdit();
    gridlayout->addWidget(namelabel,0,0);
    gridlayout->addWidget(nameedit,0,1);
    gridlayout->addWidget(codelabel,1,0);
    gridlayout->addWidget(codeedit,1,1);
    layout->addLayout(gridlayout);
    hlayout = new QHBoxLayout;
    confirm = new QPushButton(tr("Confirm"));
    cancel  = new QPushButton(tr("Cancel"));
    hlayout->addWidget(confirm);
    hlayout->addWidget(cancel);
    layout->addLayout(hlayout);
    this->setLayout(layout);
    this->setWindowTitle(tr("Register"));

    connect(this->cancel,SIGNAL(clicked()),this,SLOT(close()));
    connect(this->confirm,SIGNAL(clicked()),this,SLOT(checkRegister()));
}

RegisterDlg::~RegisterDlg()
{
}

void RegisterDlg::checkRegister()
{
}

posted @ 2011-08-01 21:55 ccsdu2009 閱讀(808) | 評論 (0) | 編輯收藏

最近感覺一直在瞎忙乎

最近感覺都在瞎忙乎
無論是GUI還是Audio Effect都不能帶來收益
學(xué)了幾年編程
現(xiàn)在發(fā)現(xiàn)居然對UI編程還處于一年級水平
需要提高UI編程能力啊
這簡直就是大BUG

posted @ 2011-07-31 22:16 ccsdu2009 閱讀(479) | 評論 (1) | 編輯收藏

忽略大小寫的字符串比較函數(shù)

int strncasecomp(char const *str1, char const *str2, unsigned long len)
{
    signed int c1 = 0, c2 = 0;

    while (len--)
    {
        c1 = tolower(*str1++);
        c2 = tolower(*str2++);

        if (c1 == 0 || c1 != c2)
            break;
    }

    return c1 - c2;
}

posted @ 2011-06-16 22:43 ccsdu2009 閱讀(1460) | 評論 (0) | 編輯收藏

僅列出標(biāo)題

導(dǎo)航

常用鏈接

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