Table of Contents
This is an example of how you may give instructions on setting up your project locally. To get a local copy up and running follow these simple example steps.
- How to install Qt
- Clone the repo
git clone https://github.com/IlyasKadi/Widgets_and_Layouts.git
Create a project called hbox with the following code:
int main(int argc, char* argv[])
{
QApplication app(argc, argv);
QWidget* window = new QWidget();
window->setWindowTitle("QHBoxLayout Test");
window->show();
return app.exec();
}This will show an empty window. Your goal is to modify the code in order to display the following form:
A QHBoxLayout example.
.Header
class dialoge1 : public QWidget
{
public:
explicit dialoge1(QWidget *parent = nullptr);
protected:
void createWidgets();
void placeWidgets();
protected:
QLabel *namelabel;
QLineEdit *line;
QPushButton *search;
QHBoxLayout *hlayout;
};.cpp
dialoge1::dialoge1(QWidget *parent) : QWidget(parent)
{
createWidgets();
placeWidgets();
}
void dialoge1::createWidgets()
{
namelabel = new QLabel("Name");
line = new QLineEdit();
search = new QPushButton("Search");
hlayout = new QHBoxLayout();
setLayout(hlayout);
setWindowTitle("QHBoxLayout Test");
}
void dialoge1::placeWidgets()
{
hlayout->addWidget(namelabel);
hlayout->addWidget(line);
hlayout->addWidget(search);
}The goal of the exercice is learn to analyse the construction of a form and thencode it using Netsted layouts.
Here we show you a classic dialog from the book GB to search for a user.
You do not have to code any functinality, just the form of the dialog.
Nested Layout. .Header
class Dialog2 : public QWidget
{
public:
explicit Dialog2(QWidget *parent = nullptr);
protected:
void createWidgets();
void placeWidgets();
protected:
QLabel *namelabel;
QLineEdit *line;
QPushButton *search;
QPushButton *close;
QHBoxLayout *mainLayout;
QVBoxLayout *rightLayout;
QVBoxLayout *leftLayout;
QHBoxLayout *topLeftLayout;
QCheckBox *match;
QCheckBox *backward;
};.cpp
Dialog2::Dialog2(QWidget *parent) : QWidget(parent)
{
createWidgets();
placeWidgets();
}
void Dialog2::createWidgets()
{
//Labels
namelabel = new QLabel("Name");
//Lines
line = new QLineEdit();
//Buttons
search = new QPushButton("Search");
close = new QPushButton("Close");
//checkboxes
match = new QCheckBox("Match case");
backward = new QCheckBox("Search backward");
//Layouts
mainLayout = new QHBoxLayout();
topLeftLayout = new QHBoxLayout();
rightLayout = new QVBoxLayout();
leftLayout = new QVBoxLayout();
setLayout(mainLayout);
setWindowTitle("Nested Layout Test");
resize(400,200);
}
void Dialog2::placeWidgets()
{
//Layouts structure
mainLayout->addLayout(leftLayout);
mainLayout->addLayout(rightLayout);
leftLayout->addLayout(topLeftLayout);
//objects
rightLayout->addWidget(search);
rightLayout->addWidget(close);
topLeftLayout->addWidget(namelabel);
topLeftLayout->addWidget(line);
leftLayout->addWidget(match);
leftLayout->addWidget(backward);
topLeftLayout->addSpacerItem(new QSpacerItem(15,0,QSizePolicy::Fixed));
rightLayout->addSpacerItem(new QSpacerItem(10,50,QSizePolicy::Fixed));
}-
In order to add a layout to a main one, you’ll have to use
addLayout(layout)
-
The vertical space (Stretch) could be added by
layout->addStretch(dimension)layout->addSpacer(SpaceItem)
-
the Widget with a empty checkable square is a QCheckBox
This example is taken from Qt Tutorial. You task is to create the following form to report a problem.
Dialog to report a form.
.Header
class BugRepForm: public QWidget
{
public:
explicit BugRepForm(QWidget *parent = nullptr);
protected:
void makeConnexion();
void createWidgets();
void placeWidgets();
protected:
//Layouts
QVBoxLayout *mainlayout;
QVBoxLayout *toplayout;
QHBoxLayout *midlayout;
QHBoxLayout *botlayout;
QHBoxLayout *namelayout;
QHBoxLayout *companylayout;
QHBoxLayout *phonelayout;
QHBoxLayout *emaillayout;
QHBoxLayout *problemTlayout;
QHBoxLayout *summinfolayout;
QHBoxLayout *reprodlayout;
QHBoxLayout *combblayout;
QHBoxLayout *resetlayout;
QHBoxLayout *subm_layout;
QHBoxLayout *not_slayout;
//Labels
QLabel *name;
QLabel *company;
QLabel *phone;
QLabel *email;
QLabel *problemT;
QLabel *summinfo;
QLabel *reprod;
//Lines
QLineEdit *nameL;
QLineEdit *companyL;
QLineEdit *phoneL;
QLineEdit *emailL;
QLineEdit *problemTL;
QTextEdit *summinfoL;
//Buttons
QPushButton *reset;
QPushButton *DONOTsubmit;
QPushButton *subBugRep;
//Combo_Box
QComboBox *combB;
};.cpp
BugRepForm::BugRepForm(QWidget *parent) : QWidget(parent)
{
createWidgets();
placeWidgets();
}
void BugRepForm::createWidgets()
{
//Layouts
mainlayout = new QVBoxLayout();
toplayout = new QVBoxLayout();
midlayout = new QHBoxLayout();
botlayout = new QHBoxLayout();
namelayout = new QHBoxLayout();
companylayout = new QHBoxLayout();
phonelayout = new QHBoxLayout();
emaillayout = new QHBoxLayout();
problemTlayout = new QHBoxLayout();
summinfolayout = new QHBoxLayout();
reprodlayout = new QHBoxLayout();
combblayout = new QHBoxLayout();
resetlayout = new QHBoxLayout();
subm_layout = new QHBoxLayout();
not_slayout = new QHBoxLayout();
//Labels
name = new QLabel("Name:");
company = new QLabel("Company:");
phone = new QLabel("Phone:");
email = new QLabel("Email:");
problemT = new QLabel("Problem Title:");
summinfo = new QLabel("Summary information:");
reprod = new QLabel("Reproducibility:");
//Lines
nameL = new QLineEdit();
companyL = new QLineEdit();
phoneL = new QLineEdit();
emailL = new QLineEdit();
problemTL = new QLineEdit();
summinfoL = new QTextEdit();
//Buttons
reset = new QPushButton("Reset");
DONOTsubmit = new QPushButton("Don't Submit");
subBugRep = new QPushButton("Submit Bug Report");
//Combo_Box
combB = new QComboBox;
combB->addItem("Always");
combB->addItem("Somtimes");
combB->addItem("Rarely");
setLayout(mainlayout);
setWindowTitle("Report Bug");
resize(600,600);
}
void BugRepForm::placeWidgets()
{
//Layouts structure
mainlayout->addLayout(toplayout);
mainlayout->addLayout(midlayout);
mainlayout->addLayout(botlayout);
toplayout->addLayout(namelayout);
toplayout->addLayout(companylayout);
toplayout->addLayout(phonelayout);
toplayout->addLayout(emaillayout);
toplayout->addLayout(problemTlayout);
toplayout->addLayout(summinfolayout);
midlayout->addLayout(reprodlayout);
midlayout->addLayout(combblayout);
botlayout->addLayout(resetlayout);
botlayout->addLayout(subm_layout);
botlayout->addLayout(not_slayout);
//objects
namelayout->addWidget(name);
namelayout->addWidget(nameL);
companylayout->addWidget(company);
companylayout->addWidget(companyL);
phonelayout->addWidget(phone);
phonelayout->addWidget(phoneL);
emaillayout->addWidget(email);
emaillayout->addWidget(emailL);
problemTlayout->addWidget(problemT);
problemTlayout->addWidget(problemTL);
summinfolayout->addWidget(summinfo);
summinfolayout->addWidget(summinfoL);
reprodlayout->addWidget(reprod);
combblayout->addWidget(combB,1);
resetlayout->addWidget(reset);
subm_layout->addWidget(subBugRep);
not_slayout->addWidget(DONOTsubmit);
//spacing settings
namelayout->setSpacing(132);
companylayout->setSpacing(104);
phonelayout->setSpacing(129);
emaillayout->setSpacing(135);
problemTlayout->setSpacing(72);
summinfolayout->setSpacing(5);
midlayout->setSpacing(60);
resetlayout->addSpacerItem(new QSpacerItem(50,80,QSizePolicy::Expanding));
}For our final exercice, we will visit an imporant layout that we missed in class.
- Check and read the documentation for the QGridLayout
- Once you’ve read it, try to construct the following calculator:
Calculator using the Grid Layout.
- The component showing the number is called a LCDNumber
- You may assume that at max it can contains 6 digits.
- Call the method
setMinimumHeighton you LCDNumber to set a minimu height of 80 pixels.
.Header
class Calculator : public QWidget
{
public:
explicit Calculator(QWidget *parent = nullptr);
protected:
void makeConnexion();
void createWidgets();
void placeWidgets();
protected:
//Layouts
QGridLayout *mainGridlayout;
//Buttons
QVector<QPushButton*> calelements;
QPushButton *element;
//lcd
QLCDNumber *lcdnum;
private:
int k=0;
};.cpp
Calculator::Calculator(QWidget *parent) : QWidget(parent)
{
createWidgets();
placeWidgets();
}
void Calculator::createWidgets()
{
//Buttons
for (int i=9;i>0;i--)
{
element = new QPushButton(QString::number(i));
calelements.push_back(element);
}
//LCDnum
lcdnum = new QLCDNumber();
mainGridlayout = new QGridLayout;
setLayout(mainGridlayout);
setWindowTitle("Numeric Keypad");
resize(340,320);
}
void Calculator::placeWidgets()
{
//Objects
lcdnum->setMinimumHeight(80);
mainGridlayout->addWidget(lcdnum,0,0,1,3);
for (int i=1;i<=3 ;i++)
{
for (int j=0;j<=2;j++)
{
mainGridlayout->addWidget(calelements[k],i,j);
k++;
}
}
mainGridlayout->addWidget(new QPushButton("0"),4,0);
mainGridlayout->addWidget(new QPushButton("enter"),4,1,1,2);
}Our Team - AIT EL KADI Ilyas - AZIZ Oussama
Project Link: Widgets_and_Layouts
Encadré par : Mr.BELCAID-Anass