[SOLVED] changing image using keypress

[IamSumit]

Hi.
Yeah it is possible.

[sasireka]

[quote author="IamSumit" date="1412069646"]Hi.
Yeah it is possible.

[/quote]

yes i done . thanks

[Francknos]

construct a QVector<QMovie> _movies;
and add it to constructor then when you press F2:

cpt++
ui->processLabel->setMovie(_movies[cpt]);
_movies[cpt]->start();

[IamSumit]

@void Dialog::keyPressEvent(QKeyEvent *e)
{

static int key_press;

if(e->key() == Qt::Key_F2)
{
    key_press++;
}

if(key_press == 1)
    {
            QMovie *movie = new QMovie("/home/dev6/Desktop/animation/spectrum.gif");
            QLabel *processLabel = new QLabel(this);
            ui->processLabel->setMovie(movie);
            movie->start();

            ui->label1->setText(QString::fromUtf8("chennai  சென்னை"));
            ui->label1->show();
    }

 if(key_press == 2)
    {
            QMovie *movie = new QMovie("/home/dev6/Desktop/animation/1.gif");
            QLabel *processLabel = new QLabel(this);
            ui->processLabel->setMovie(movie);
            movie->start();

            ui->label1->setText(QString::fromUtf8("சென்னை Namakkal"));
            ui->label1->show();
    }
 if(key_press == 3)
    {
            QMovie *movie = new QMovie("/home/dev6/Desktop/animation/2.gif");
            QLabel *processLabel = new QLabel(this);
            ui->processLabel->setMovie(movie);
            movie->start();

            ui->label1->setText(QString::fromUtf8("coimbatore சென்னை"));
            ui->label1->show();
    }

}@

hi..
this is not a right way.Because many of same instructions are repeating.

you can optimize your code .You must create a method with parameter QString path
e'g;
@
void ShowPicture(QString path)
{
QMovie *movie = new QMovie(path);
QLabel *processLabel = new QLabel(this);
ui->processLabel->setMovie(movie);
movie->start();

            ui->label1->setText(QString::fromUtf8("chennai  சென்னை"));
            ui->label1->show();

}
@
hope it helps

[sasireka]

[quote author="Francknos" date="1412070831"]construct a QVector<QMovie> _movies;
and add it to constructor then when you press F2:

cpt++
ui->processLabel->setMovie(_movies[cpt]);
_movies[cpt]->start();
[/quote]

okay i will try in this way...

[sasireka]

[quote author="IamSumit" date="1412074165"]

hi..
this is not a right way.Because many of same instructions are repeating.

you can optimize your code .You must create a method with parameter QString path
e'g;
@
void ShowPicture(QString path)
{
QMovie *movie = new QMovie(path);
QLabel *processLabel = new QLabel(this);
ui->processLabel->setMovie(movie);
movie->start();

            ui->label1->setText(QString::fromUtf8("chennai  சென்னை"));
            ui->label1->show();

}
@
hope it helps[/quote]

okay. How to call this function and where to call it.

[sasireka]

i used like this getting error

/home/dev6/Desktop/animation-build-desktop-Qt_4_8_1_in_PATH__System__Release/../animation/dialog.cpp:53: error: a function-definition is not allowed here before '{' token

/home/dev6/Desktop/animation-build-desktop-Qt_4_8_1_in_PATH__System__Release/../animation/dialog.cpp:69: error: 'ShowPicture' was not declared in this scope

@void Dialog::keyPressEvent(QKeyEvent *e)
{

void ShowPicture(QString path)
{
                QMovie *movie = new QMovie(path);
                QLabel *processLabel = new QLabel(this);
                ui->processLabel->setMovie(movie);
                movie->start();

                ui->label1->setText(QString::fromUtf8("chennai  சென்னை"));
                ui->label1->show();
}

static int key_press = 0;

if(e->key() == Qt::Key_F3)
{

   // QString path = "/home/dev6/Desktop/animation/3.gif";
    ShowPicture("/home/dev6/Desktop/animation/3.gif");
    
}@

[IamSumit]

[quote author="sasireka" date="1412078116"]i used like this getting error

/home/dev6/Desktop/animation-build-desktop-Qt_4_8_1_in_PATH__System__Release/../animation/dialog.cpp:53: error: a function-definition is not allowed here before '{' token

/home/dev6/Desktop/animation-build-desktop-Qt_4_8_1_in_PATH__System__Release/../animation/dialog.cpp:69: error: 'ShowPicture' was not declared in this scope

@void Dialog::keyPressEvent(QKeyEvent *e)
{

void ShowPicture(QString path)
{
                QMovie *movie = new QMovie(path);
                QLabel *processLabel = new QLabel(this);
                ui->processLabel->setMovie(movie);
                movie->start();

                ui->label1->setText(QString::fromUtf8("chennai  சென்னை"));
                ui->label1->show();
}

static int key_press = 0;

if(e->key() == Qt::Key_F3)
{

   // QString path = "/home/dev6/Desktop/animation/3.gif";
    ShowPicture("/home/dev6/Desktop/animation/3.gif");
    
}@[/quote]

hi..
After looking your code ...i think you are new to programming.are you?
you are defining the method inside another method .this is not the correct
way
just call ShowPicture("/home/dev6/Desktop/animation/2.gif");
then you will not face any error.
hope it helps

[sasireka]

[quote author="IamSumit" date="1412079562"][quote author="sasireka" date="1412078116"]i used like this getting error

/home/dev6/Desktop/animation-build-desktop-Qt_4_8_1_in_PATH__System__Release/../animation/dialog.cpp:53: error: a function-definition is not allowed here before '{' token

/home/dev6/Desktop/animation-build-desktop-Qt_4_8_1_in_PATH__System__Release/../animation/dialog.cpp:69: error: 'ShowPicture' was not declared in this scope

@void Dialog::keyPressEvent(QKeyEvent *e)
{

void ShowPicture(QString path)
{
                QMovie *movie = new QMovie(path);
                QLabel *processLabel = new QLabel(this);
                ui->processLabel->setMovie(movie);
                movie->start();

                ui->label1->setText(QString::fromUtf8("chennai  சென்னை"));
                ui->label1->show();
}

static int key_press = 0;

if(e->key() == Qt::Key_F3)
{

   // QString path = "/home/dev6/Desktop/animation/3.gif";
    ShowPicture("/home/dev6/Desktop/animation/3.gif");
    
}@[/quote]

hi..
After looking your code ...i think you are new to programming.are you?
you are defining the method inside another method .this is not the correct
way
just call ShowPicture("/home/dev6/Desktop/animation/2.gif");
then you will not face any error.
hope it helps[/quote]

good day. yes i am new to Qt programming. Okay i will do like this. Thanks Sumit. Give me a guide to learn Qt programming and library usage.

[sasireka]

bq. hi..
After looking your code ...i think you are new to programming.are you?
you are defining the method inside another method .this is not the correct
way
just call ShowPicture("/home/dev6/Desktop/animation/2.gif");
then you will not face any error.
hope it helps[/quote]bq.

i did like below. but getting errors.

@void ShowPicture(QString path)
{
QMovie *movie = new QMovie(path);
QLabel *processLabel = new QLabel(this);
ui->processLabel->setMovie(movie);
movie->start();

            ui->label1->setText(QString::fromUtf8("chennai  சென்னை"));
            ui->label1->show();

}

void Dialog::keyPressEvent(QKeyEvent *e)
{

if(e->key() == Qt::Key_F3)
{
        ShowPicture(”/home/dev6/Desktop/animation/2.gif”);
}

}@

[IamSumit]

Hi .
Can you show me your full code (including .h)?
and tell me what errors you are getting also?

[sasireka]

[quote author="IamSumit" date="1412144476"]Hi .
Can you show me your full code (including .h)?
and tell me what errors you are getting also?

[/quote]

@#include "dialog.h"
#include "ui_dialog.h"
#include <QMovie>
#include <QImage>
#include <QFontDatabase>
#include <QDebug>
#include <QKeyEvent>

Dialog::Dialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::Dialog)
{
ui->setupUi(this);
}

Dialog::~Dialog()
{
delete ui;
}

void ShowPicture(QString path)
{
QMovie *movie = new QMovie(path);
QLabel *processLabel = new QLabel(this);
ui->processLabel->setMovie(movie);
movie->start();

            ui->label1->setText(QString::fromUtf8("chennai  சென்னை"));
            ui->label1->show();

}

void Dialog::keyPressEvent(QKeyEvent *e)
{

if(e->key() == Qt::Key_F3)
{
        ShowPicture(”/home/dev6/Desktop/animation/2.gif”);
}

}@

[IamSumit]

ok.
ShowPicture(QString) is the member function/method of Dialog class.
i can't see proper definition of this method.
in line 21.
@
Replace void Dialog::ShowPicture(QString path)
@

and in .h file declare this method as member.
in .h file. add this line
@
public:
void ShowPicture(QString path);
@

and your oops basics are not clear.So, Please improve your basics first.

Hope it helps.

[sasireka]

i tried . but still getting error

[IamSumit]

What errors ?

[sasireka]

Good day.
[quote author="IamSumit" date="1412164041"]What errors ?[/quote]

@void Dialog::ShowPicture(QString path)
{
QMovie *movie = new QMovie(path);
QLabel *processLabel = new QLabel(this);
ui->processLabel->setMovie(movie);
movie->start();

            ui->label1->setText(QString::fromUtf8("chennai  சென்னை"));
            ui->label1->show();

}

void Dialog::keyPressEvent(QKeyEvent *e)
{

if(e->key() == Qt::Key_F3)
{
        ShowPicture(/home/dev6/Desktop/animation/2.gif);
}

}@

errors:

1. /home/dev6/Desktop/animation-build-desktop-Qt_4_8_1_in_PATH__System__Release/../animation/dialog.cpp:70: error: invalid suffix "gif" on floating constant

2. * /home/dev6/Desktop/animation-build-desktop-Qt_4_8_1_in_PATH__System__Release/../animation/dialog.cpp:-1: In member function 'void Dialog::ShowPicture(QString)':
1<* /home/dev6/Desktop/animation-build-desktop-Qt_4_8_1_in_PATH__System__Release/../animation/dialog.cpp:70: error: expected primary-expression before '/' token

2< /home/dev6/Desktop/animation-build-desktop-Qt_4_8_1_in_PATH__System__Release/../animation/dialog.cpp:70: error: 'home' was not declared in this scope

3< /home/dev6/Desktop/animation-build-desktop-Qt_4_8_1_in_PATH__System__Release/../animation/dialog.cpp:70: error: 'home' was not declared in this scope

4< /home/dev6/Desktop/animation-build-desktop-Qt_4_8_1_in_PATH__System__Release/../animation/dialog.cpp:70: error: 'Desktop' was not declared in this scope

5< /home/dev6/Desktop/animation-build-desktop-Qt_4_8_1_in_PATH__System__Release/../animation/dialog.cpp:70: error: 'animation' was not declared in this scope

[IamSumit]

Hi.
You are not passing a string .string always encloses " " quotes.
@
19.ShowPicture(/home/dev6/Desktop/animation/2.gif);
@
Correct it as .
ShowPicture("/home/dev6/Desktop/animation/2.gif");

[sasireka]

[quote author="IamSumit" date="1412585094"]Hi.
You are not passing a string .string always encloses " " quotes.
@
19.ShowPicture(/home/dev6/Desktop/animation/2.gif);
@
Correct it as .
ShowPicture("/home/dev6/Desktop/animation/2.gif");
[/quote]

yes.. really i am so sorry.Thanks alot. great help.

[sasireka]

Thanks alot IamSumit IamSumit and all.

[IamSumit]

That's ok .

Now please Make your thread title as [SOLVED] so others could notify that solution has been found.:)