how can i insert more lines from qt in the post?

Intermediate

Sunday, May 8th 2005, 7:11pm

how can i insert more lines from qt in the post? #?

	Source code
1	void Form1::playsound()

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marioo

Intermediate

Posts: 267

2

Sunday, May 8th 2005, 7:18pm

RE: how can i insert more lines from qt in the post?

ok here again:

i want to play the next song if the first are finished.But qt play allways the next bevor playing the first.

Quoted

void Form1::playsound()
{
listView->setFocus();

if (listView->currentItem() == 0){
QMessageBox::information(this,
("Info"),
("List is Empty"));
}

else{
QSound::play("/firma2/jukebox/sounds/" + feld_le->text()+"/" + ( listView->currentItem() )->text( 0 ) + "");
}

QSound soundend("/firma2/jukebox/sounds/" + feld_le->text()+"/" + ( listView->currentItem() )->text( 0 ) + "");

if(soundend.isFinished()){

QSound::play("/firma2/jukebox/sounds/mario/bassdrum");
}
}

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dimitri

Professional

Posts: 1,311

Occupation: Engineer

3

Sunday, May 8th 2005, 7:21pm

RE: how can i insert more lines from qt in the post?

The indenting of your code is still unusual to the least. It's unreadable. Could you try to format and indent it properly?

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anda_skoa

Master

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Location: Graz, Austria

Occupation: Student

4

Sunday, May 8th 2005, 7:33pm

Create a sound object for each sound you want to play instead of using the static play method!

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_

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Debian User

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marioo

Intermediate

Posts: 267

5

Sunday, May 8th 2005, 7:51pm

play dont need a object!
isfinished need one, and i have allready done!See code

I think my problem is here:

Quoted

if(soundend.isFinished()){

QSound::play("/firma2/jukebox/sounds/mario/bassdrum");
}

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anda_skoa

Master

Posts: 2,162

Location: Graz, Austria

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6

Sunday, May 8th 2005, 8:59pm

Ok, even one single sentence seems to be too complex for you.
I'll try more fool proof

static QSound::play bad

QSound* sound = new QSound(filename);
sound->play()
good

Reason:
sound->stop() possible
sound->isFinished() returning value related to sound

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_

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Debian User

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marioo

Intermediate

Posts: 267

7

Sunday, May 8th 2005, 9:33pm

thanks.but it did not work yet.

this part work well:

Quoted

void Form1::playsound()
{
listView->setFocus();

if (listView->currentItem() == 0){
QMessageBox::information(this,
("Info"),
("List is Empty"));
}

else{

QSound* sound = new QSound("/firma2/jukebox/sounds/" + feld_le->text()+"/" + ( listView->currentItem() )->text( 0 ) + "");
sound->play();
}

but this part not:

Quoted

QSound* sound = new QSound("/firma2/jukebox/sounds/" + feld_le->text()+"/" + ( listView->currentItem() )->text( 0 ) + "");

if(sound.isFinished()){

QSound* playnext = new QSound("/firma2/jukebox/sounds/mario/bassdrum");
playnext->play();
}
}

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anda_skoa

Master

Posts: 2,162

Location: Graz, Austria

Occupation: Student

8

Sunday, May 8th 2005, 9:37pm

I really, really hope you are calling isFinished on the correct oject.
The one which is playing.

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_

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Debian User

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marioo

Intermediate

Posts: 267

9

Sunday, May 8th 2005, 9:41pm

yes it is or not?

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marioo

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Posts: 267

10

Sunday, May 8th 2005, 9:45pm

Quoted

QSound* sound = new QSound("/firma2/jukebox/sounds/" + feld_le->text()+"/" + ( listView->currentItem() )->text( 0 ) + "");

if(sound->isFinished()){

QSound* playnext = new QSound("/firma2/jukebox/sounds/mario/bassdrum");
playnext->play();
}

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marioo

Intermediate

Posts: 267

11

Sunday, May 8th 2005, 9:56pm

if a call the function playsound(), Qt play allway just:

Quoted

if(sound->isFinished()){
QSound* playnext = new QSound("/firma2/jukebox/sounds/mario/bassdrum");
playnext->play();
}

Why?

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anda_skoa

Master

Posts: 2,162

Location: Graz, Austria

Occupation: Student

12

Monday, May 9th 2005, 10:22am

Quoted

Originally posted by marioo
yes it is or not?

Well, I am asking you!

You only posted parts of the new code, if you still have the double object construction from your old code, you have to read up on the concept of objects.

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_

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wysota

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Posts: 4,276

Location: Warsaw, POLAND

13

Monday, May 9th 2005, 10:30am

Quoted

Originally posted by marioo

Quoted

QSound* sound = new QSound("/firma2/jukebox/sounds/" + feld_le->text()+"/" + ( listView->currentItem() )->text( 0 ) + "");

if(sound->isFinished()){

QSound* playnext = new QSound("/firma2/jukebox/sounds/mario/bassdrum");
playnext->play();
}

Do you play the first sound (sound) at all? Because here you just create an object and check if it finished playing (without even starting it).

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marioo

Intermediate

Posts: 267

14

Monday, May 9th 2005, 11:42am

by click my button, i call the function playsound();
this function have to play first the selected item(sound).
And if the selected song(sound) is finish i want to play the next sound(playnext).But he dont play the selected (sound)first.Why?

He play just the next (playnext)!

here the code again:

Quoted

void Form1::playsound()
{
listView->setFocus();

if (listView->currentItem() == 0){
QMessageBox::information(this,
("Info"),
("List is Empty"));
}

else{

QSound* sound = new QSound("/firma2/jukebox/sounds/" + feld_le->text()+"/" + ( listView->currentItem() )->text( 0 ) + "");
sound->play();
}

QSound* sound = new QSound("/firma2/jukebox/sounds/" + feld_le->text()+"/" + ( listView->currentItem() )->text( 0 ) + "");

if(sound->isFinished()){

QSound* playnext = new QSound("/firma2/jukebox/sounds/mario/bassdrum");
playnext->play();
}
}

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wysota

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Posts: 4,276

Location: Warsaw, POLAND

15

Monday, May 9th 2005, 12:11pm

Quoted

Originally posted by marioo

Source code

//...
else{
    QSound* sound = new QSound("/firma2/jukebox/sounds/" + feld_le->text()+"/" + ( listView->currentItem() )->text( 0 ) + "");
    sound->play();
}
 
QSound* sound = new QSound("/firma2/jukebox/sounds/" + feld_le->text()+"/" + ( listView->currentItem() )->text( 0 ) + "");

if(sound->isFinished()){

     QSound* playnext = new QSound("/firma2/jukebox/sounds/mario/bassdrum");
    playnext->play();
}

First you start playing the first entry and them immediately the variable runs out of scope (which means that you can't control it anymore and it gets deleted but the QSound object still exists, you just can't access it any longer) and then you create another sound and you check if that newly created sound is playing and because it is not, you play it causing probably the previous sound to be stopped.

You should have a timer that would periodically check if the previous sound finished playing and if it did, spawn the next sound. And you definitely need to improve your C++ knowledge especially about local variables. And next time, please use the code tag instead of quote and indent your code to make it a bit more readable.

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marioo

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Posts: 267

16

Monday, May 9th 2005, 1:03pm

how complicated is that?I dont have idea how to beginn...

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wysota

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Location: Warsaw, POLAND

17

Monday, May 9th 2005, 2:14pm

Begin by writing down what exactly you want to achieve and then think about how it can be done, I mean how would you do it without a computer. Don't skip obvious things, don't assume that something is done automatically. Then come back with the list and we'll see what we can do for you

Oh, and don't expect us to write your program for you, all we do is help and give hints.

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marioo

Intermediate

Posts: 267

18

Monday, May 9th 2005, 2:43pm

1. play sound1
2. check time from sound1
3. if time from sound1is finished
4. play sound2

1. QSound:

lay()
2. QTimer
3. QSound::isFinished
4. QSound:

lay()

is that ok?

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wysota

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Posts: 4,276

Location: Warsaw, POLAND

19

Monday, May 9th 2005, 2:46pm

Quoted

Originally posted by marioo
is that ok?

No. I asked you how would YOU (as a human) do it -- what things need to be done to achieve your goal. Forget that Qt even exists now, just think what actions need to be taken to do what you want. Then you can "translate" them to C++ code.

And I mean detailed actions, it won't be three or four items. You have to think, wheather the application should wait for something in a particular moment, etc.

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anda_skoa

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Location: Graz, Austria

Occupation: Student

20

Monday, May 9th 2005, 2:54pm

Quoted

Originally posted by marioo
how complicated is that?I dont have idea how to beginn...

It is not compliucated, it is in fact very easy if one understands objects in the real world.

If you have to apples and you eat one of them, you won't wonder why the other one is still not eaten.

How difficult is it to map that to sound objects?
If you create two objects for the same sound file and you start one, why do you expect the other object to change?

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_

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Debian User

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