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QT (IV) mixed development using code and UI files

2022-07-27 15:34:00 【51CTO】

List of articles

One 、UI Design
Two 、 Code development

One 、UI Design

New projects , The main options are shown below ： One MainWindow, belt ui file .

Qt（ Four ） Use code and UI File hybrid development _ development language

preliminary Ui Design

Qt（ Four ） Use code and UI File hybrid development _ui Design _02

Signal and slot function ： Map the above operation behavior to the slot function to perform the operation .

Qt（ Four ） Use code and UI File hybrid development _ico_03

Two 、 Code development

mainwindow.h

       
       #ifndef MAINWINDOW_H
       
       #define MAINWINDOW_H
       
       #include <QMainWindow>
       
       #include <QLabel>
       
       #include <QProgressBar> 
       
       //  Progress bar 
       
       #include <QSpinBox> 
       
       //  Font size setting box 
       
       #include <QFontComboBox> 
       
       // Drop down font selection 
       
       QT_BEGIN_NAMESPACE
       
       namespace 
       
       Ui { 
       
       class 
       
       MainWindow; }
       
       QT_END_NAMESPACE
       
       class 
       
       MainWindow : 
       
       public 
       
       QMainWindow
       
{
       
       Q_OBJECT
       
       private:
       
       QLabel
       
       * 
       
       flabCurFile;
       
       QProgressBar
       
       * 
       
       progressBar;
       
       QSpinBox
       
       * 
       
       spinFontSize;
       
       QFontComboBox 
       
       * 
       
       comboFont;
       
       void 
       
       initUI();
       
       void 
       
       initSignalSlots();
       
       public:
       
       MainWindow(
       
       QWidget 
       
       *
       
       parent 
       
       = 
       
       nullptr);
       
       ~MainWindow();
       
       private 
       
       slots:
       
       void 
       
       on_actBold_triggered(
       
       bool 
       
       checked);
       
       void 
       
       on_textEdit_copyAvailable(
       
       bool 
       
       b);
       
       void 
       
       on_textEdit_selectionChanged();
       
       void 
       
       on_spinBoxFontSize_valueChange(
       
       int 
       
       aFontSize);
       
       void 
       
       on_comboFont_currentIndexChanged(
       
       const 
       
       QString 
       
       &
       
       args1);
       
       private:
       
       Ui::MainWindow 
       
       *
       
       ui;
       
};
       
       #endif 
       
       // MAINWINDOW_H
      
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mainwindow.cpp

       
       #include "mainwindow.h"
       
       #include "ui_mainwindow.h"
       
       #include <QMainWindow>
       
       void 
       
       MainWindow::initUI()
       
{
       
       flabCurFile 
       
       = 
       
       new 
       
       QLabel;
       
       flabCurFile
       
       ->
       
       setMidLineWidth(
       
       150);
       
       flabCurFile
       
       ->
       
       setText(
       
       " Current file ：");
       
       ui
       
       ->
       
       statusbar
       
       ->
       
       addWidget(
       
       flabCurFile);
       
       progressBar 
       
       = 
       
       new 
       
       QProgressBar;
       
       progressBar
       
       ->
       
       setMinimum(
       
       5);
       
       progressBar
       
       ->
       
       setMaximum(
       
       50);
       
       progressBar
       
       ->
       
       setValue(
       
       ui
       
       ->
       
       textEdit
       
       ->
       
       font().
       
       pointSize());
       
       ui
       
       ->
       
       statusbar
       
       ->
       
       addWidget(
       
       progressBar);
       
       spinFontSize 
       
       = 
       
       new 
       
       QSpinBox;
       
       spinFontSize
       
       ->
       
       setMinimum(
       
       5);
       
       spinFontSize
       
       ->
       
       setMaximum(
       
       50);
       
       ui
       
       ->
       
       toolBar
       
       ->
       
       addWidget(
       
       new 
       
       QLabel(
       
       " font size "));
       
       ui
       
       ->
       
       toolBar
       
       ->
       
       addWidget(
       
       spinFontSize);
       
       comboFont 
       
       = 
       
       new 
       
       QFontComboBox;
       
       ui
       
       ->
       
       toolBar
       
       ->
       
       addWidget(
       
       new 
       
       QLabel(
       
       " typeface "));
       
       ui
       
       ->
       
       toolBar
       
       ->
       
       addWidget(
       
       comboFont);
       
       setCentralWidget(
       
       ui
       
       ->
       
       textEdit);
       
}
       
       void 
       
       MainWindow::initSignalSlots()
       
{
       
       connect(
       
       spinFontSize,
       
       SIGNAL(
       
       valueChanged(
       
       int)),
       
       this,
       
       SLOT(
       
       on_spinBoxFontSize_valueChange(
       
       int)));
       
       connect(
       
       comboFont,
       
       SIGNAL(
       
       currentIndexChanged(
       
       const 
       
       QString
       
       &)),
       
       this,
       
       SLOT(
       
       on_comboFont_currentIndexChanged(
       
       const 
       
       QString
       
       &)));
       
}
       
       MainWindow::MainWindow(
       
       QWidget 
       
       *
       
       parent)
       
    : 
       
       QMainWindow(
       
       parent)
       
    , 
       
       ui(
       
       new 
       
       Ui::MainWindow)
       
{
       
       ui
       
       ->
       
       setupUi(
       
       this);
       
       initUI();
       
       initSignalSlots();
       
}
       
       MainWindow::~MainWindow()
       
{
       
       delete 
       
       ui;
       
}
       
       void 
       
       MainWindow::on_actBold_triggered(
       
       bool 
       
       checked)
       
{
       
       QTextCharFormat 
       
       fmt;
       
       if(
       
       checked)
       
       fmt.
       
       setFontWeight(
       
       QFont::Bold);
       
       else
       
       fmt.
       
       setFontWeight(
       
       QFont::Normal);
       
       ui
       
       ->
       
       textEdit
       
       ->
       
       mergeCurrentCharFormat(
       
       fmt);
       
}
       
       void 
       
       MainWindow::on_textEdit_copyAvailable(
       
       bool 
       
       b)
       
{
       
       ui
       
       ->
       
       actCut
       
       ->
       
       setEnabled(
       
       b);
       
       ui
       
       ->
       
       actCopy
       
       ->
       
       setEnabled(
       
       b);
       
       ui
       
       ->
       
       actPaste
       
       ->
       
       setEnabled(
       
       ui
       
       ->
       
       textEdit
       
       ->
       
       canPaste());
       
}
       
       void 
       
       MainWindow::on_textEdit_selectionChanged()
       
{
       
       QTextCharFormat 
       
       fmt;
       
       fmt 
       
       = 
       
       ui
       
       ->
       
       textEdit
       
       ->
       
       currentCharFormat();
       
       ui
       
       ->
       
       actItalic
       
       ->
       
       setChecked(
       
       fmt.
       
       fontItalic());
       
       ui
       
       ->
       
       actBold
       
       ->
       
       setChecked(
       
       fmt.
       
       font().
       
       bold());
       
       ui
       
       ->
       
       actUndelline
       
       ->
       
       setChecked(
       
       fmt.
       
       fontUnderline());
       
}
       
       void 
       
       MainWindow::on_spinBoxFontSize_valueChange(
       
       int 
       
       aFontSize)
       
{
       
       QTextCharFormat 
       
       fmt;
       
       fmt.
       
       setFontPointSize(
       
       aFontSize);
       
       ui
       
       ->
       
       textEdit
       
       ->
       
       mergeCurrentCharFormat(
       
       fmt);
       
       progressBar
       
       ->
       
       setValue(
       
       aFontSize);
       
}
       
       void 
       
       MainWindow::on_comboFont_currentIndexChanged(
       
       const 
       
       QString 
       
       &
       
       args1)
       
{
       
       QTextCharFormat 
       
       fmt;
       
       fmt.
       
       setFontFamily(
       
       args1);
       
       ui
       
       ->
       
       textEdit
       
       ->
       
       mergeCurrentCharFormat(
       
       fmt);
       
}
      
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main.cpp

       
       #include "mainwindow.h"
       
       #include <QApplication>
       
       int 
       
       main(
       
       int 
       
       argc, 
       
       char 
       
       *
       
       argv[])
       
{
       
       QApplication 
       
       a(
       
       argc, 
       
       argv);
       
       MainWindow 
       
       w;
       
       w.
       
       show();
       
       return 
       
       a.
       
       exec();
       
}
      
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by APP App add Icon
In the engineering .pro Put... In the peer folder ico Images , And add the file name to .pro in , as follows ：

       
       RC_ICONS 
       
       = 
       
       title.
       
       ico
      
1.

Effect demonstration ：（ Italics and underlining are not implemented ）

Qt（ Four ） Use code and UI File hybrid development _qt_04

Toolbar compilation does not display icons

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当前位置：网站首页>QT (IV) mixed development using code and UI files

QT (IV) mixed development using code and UI files

List of articles

One 、UI Design

Two 、 Code development

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