"QT5 Development and Example" 5, layout management of the stack form Qstackedwidget class

The usual, give a goal to achieve the following:

Code presentation,

First create a project, do not interface, select the base class is Qdialog this, after the name of the words of the random change

My class name is: Stackdlg

So after that, just add two headers to the stackdlg.h and wait for it to be used.

#include <QListWidget> #include <QStackedWidget> #include <QLabel> #include <QHBoxLayout>

All code

#ifndef stackdlg_h#define stackdlg_h#include <QDialog> #include <QListWidget> #include <qstackedwidget > #include <qlabel>class stackdlg:public qdialog{  q_objectpublic:  stackdlg (Qwidget *parent = 0);  ~stackdlg ();p rivate:  qlistwidget *list;  list box  qstackedwidget *stack;  Stack form  Qlabel *label1;   Text Form  Qlabel *label2;  Qlabel *label3;}; #endif//Stackdlg_h

And then inside the Stackdlg.cpp is:

#include "stackdlg.h" #include <QListWidget> #include <QStackedWidget> #include <QLabel> #include <qhboxlayout>stackdlg::stackdlg (Qwidget *parent): Qdialog (parent)//inherited constructor {Setwindowtitle (tr ("    Stackedwidget "));   Set the name of the form list = new Qlistwidget (this);  Create a list box//Add elements to this list box List->insertitem (0, tr ("the"));  List->insertitem (1, TR ("No.2"));  List->insertitem (2, TR ("No.3"));  Label1 = new Qlabel (tr ("Test 1"));  Label2 = new Qlabel (tr ("Test 2"));  Label3 = new Qlabel (tr ("Test 3")); stack = new Qstackedwidget (this); Create a stack form for this main form stack->addwidget (Label1); Add a text into the form stack->addwidget (Label2); Add a second stack->addwidget (LABEL3);  Add a third qhboxlayout *mainlayout = new Qhboxlayout (this); Set a layout mainlayout->setmargin (5);  Set the margin for this dialog box mainlayout->setspacing (5);  Sets the margin Mainlayout->addwidget (list) between controls;  Add the contents of the list to the form inside Mainlayout->addwidget (stack, 0, qt::alignhcenter);  Mainlayout->setstretchfactor (list, 3); Set to ScalableControl, the first parameter is the control used to specify the setting, and the second greater than 0 indicates that the control is scalable Mainlayout->setstretchfactor (stack, 3); Connect (list, SIGNAL (currentrowchanged (int)), stack, SLOT (setcurrentindex (int)));} Stackdlg::~stackdlg () {}

The rest has not changed, how feel very tired???

And then modify a little bit, and we'll see what the Qlistwidget really is.

#include "stackdlg.h" #include <QListWidget> #include <QStackedWidget> #include <QLabel> #include <qhboxlayout>stackdlg::stackdlg (Qwidget *parent): Qdialog (parent)//inherited constructor {Setwindowtitle (tr ("    Stackedwidget "));   Set the name of the form list = new Qlistwidget (this);  Create a list box//Add elements to this list box List->insertitem (0, tr ("the"));  List->insertitem (1, TR ("No.2"));  List->insertitem (2, TR ("No.3"));   List->insertitem (2, TR ("222"));  After the addition will cover the front, here and above is not the same, the rest as Label1 = new Qlabel (tr ("Test 1"));  Label2 = new Qlabel (tr ("Test 2"));  Label3 = new Qlabel (tr ("Test 3")); stack = new Qstackedwidget (this); Create a stack form for this main form stack->addwidget (Label1); Add a text into the form stack->addwidget (Label2); Add a second stack->addwidget (LABEL3);  Add a third qhboxlayout *mainlayout = new Qhboxlayout (this); Set a layout mainlayout->setmargin (5);  Set the margin for this dialog box mainlayout->setspacing (5);  Sets the margin Mainlayout->addwidget (list) between controls; Add the contents of the list to the form mainlayout->addwidget (stack, 0, Qt::aliGnhcenter);  Mainlayout->setstretchfactor (list, 3);  is set to a scalable control, the first parameter is the control that specifies the setting, and the second greater than 0 indicates that the control is scalable Mainlayout->setstretchfactor (stack, 3); Connect (list, SIGNAL (currentrowchanged (int)), stack, SLOT (setcurrentindex (int)));} Stackdlg::~stackdlg () {}

Execution Result:

"QT5 Development and Example" 5, layout management of the stack form Qstackedwidget class