How to include .txt on Qt

mrjj

@Payx
oh did you create the painter first ?
Oh You need to create it first. as a variable.
QPainter painter(this);

But here comes an issue. you can only use a painter in a PaintEvent function.

So only other way is to have a Pixmap as member and then paint to it in Remplissage
and then later paint the pixmap in PaintEvent.

Anyway to paint to an image
QPixmap pix(500,500); // make sure size matches, might need to live as member in class for paintEvent
QPainter painter(&pix);// give pix to painter
...
painter.drawPixmap(topLeft, scaledPix); //

Payx

ok but i have an other question,

in my QMap, i defined my picture "fraise.png" as a QString ImageName;

so when i write

QPixmap pix( ci.ImageName );

it will create a Pixmap from my image ?

mrjj

@Payx
yes that will create a pixmap if the path to image is valid.

QPixmap pix( ci.ImageName );

BUT
you seems to store as e "fraise.png" ?
That wont work as there is no path so it cant find it.

However if you embed the images via qres file
then the syntax ":/"
will allow to load them.
":/fraise.png"

http://doc.qt.io/qt-5/resources.html
These images are then embedded into the .exe file and can be loaded with ":/" in front.

If you want to use external files, you must think of how to handle the paths.

Payx

mrjj: SORRY i edited your post!. browser lag. cannot undo
Im very sorry.

Yes i have already do that u explained to me before ^^
Oh. sorry. Well now we know its working :)
seems good. Note its single ":/" not "://"

and i dont understand the "Give pix to painter"

When you construct the painter you give it the widget normally
QPainter painter(this); <<< "this" being the widget pointer
but when we paint on image then we give pixmap instead of "this"
QPainter painter(&pix); // pix is pixmap and not widget
So basically we tell painter to draw on this picmap and not on a widget.

mrjj

@Payx
So you last issue is the painting of the little image.

Since we are not allowed to paint inside Remplissage, you have 2 options.

Do this in paintEvent. ( meaning call Remplissage )
or
let Remplissage paint on a new pixmap and then later paint this new pix in
the real paintEvent function.

Payx

What is the simpliest method ? ahah

mrjj

@Payx said in How to include .txt on Qt:

What is the simpliest method ? ahah

I think to paint on image as you can then later just
show in QLabel and might not even need to make a PaintEvent.
This new image should be the size of the red rect one where u scan for colors.
so you will draw the mini images on this new picmap and then its the final pixmap i assume.

Payx

so on my rectangle i create a label and i display the pixmap in the label ?

mrjj

@Payx
I dont know what rectangle is.
the QLabel should/could be placed on UI and after you created the final image and OUTSIDE
of any loops
you can do
ui->Label->setPix thing.

Payx

so in this loop

  for(int x = topLeft.x(); x < maxX; ++x) {
    for(int y = topLeft.y(); y < maxY; ++y) {

i can include

QLabel *label = new QLabel(this);
      foreach( QRgb key, Costs.keys() ) {
        QColor BaseColor( key );
        if (Costs.contains( colour.rgb() ) || IsCloseColor(BaseColor, colour) )  {
          CostInfo& ci = Costs[colour.rgb()];
//          int Cost = ci.Cost;
          QPixmap pix( ci.ImageName );
					QPixmap scaledPix = pix.scaled(   8, 8,
																				 Qt::KeepAspectRatio,
																				 Qt::SmoothTransformation
																				 );

ui->label->setPixmap(pix);

?

mrjj

@Payx
yes something like that.
if pix is the FINISHED result. seems not.

That code would just show the original one?

and why new the qlabel? Why not just add to UI file with designer?

Payx

Because it will not return only one picture, if my picture is 540540 and my rectangle is 88 i cannot just add a label to display 70 picture.

at the end it will have http://www.hostingpics.net/viewer.php?id=354728program.png

by replacing all the rectangle by a picture, it depends the color of the rectangle

ambershark

@Payx said in How to include .txt on Qt:

@ambershark Lol

I prefer learn instead of just don't understand what i'm doing, i know i'm very bad to programmation by now but maybe in few years i'il be like mrjj haha !

Haha it's good that you are learning instead of asking for it done like a lot of people on these forums. And hey we all started out bad, don't worry you'll be good in no time if you stick with it. ;)

I was just quite impressed with the number of posts in this topic.

Payx

@ambershark No problem ^^!

Payx

This post is deleted!

Payx

I tried something without you (sorry ahah)

QLabel abc;
abc.setPixmap(scaledPix);
abc.show();

it compiles but there is a error : QPixmap::scaled: Pixmap is a null pixmap

mrjj

@Payx said in How to include .txt on Qt:

scaledPix

Sounds like scaledPix is not initialize as it should , which often
comes from not being able to load a file.

Make sure the image you are scaling, is indeed valid. (loaded)

Payx

Before posting, i've tried to just

QPixmap pix(":/img/ballebleue.png")
ui->setPixmap .....

and it works

u said "scaledPix is not initialize as it should ?"

EDIT : Happy New Year !

mrjj

@Payx

Yes That would make the pix valid.

To get the error " Pixmap is a null pixmap" for scaledPix means that
it was not valid. It was empty. so if it came from a scale function, it means
that the image u scaled to get scaledPix was empty.

Happy new Year :)

Payx

					QLabel abc;
//          int Cost = ci.Cost;
					QPixmap pix( ci.ImageName );
					QPixmap scaledPix = pix.scaled(   8, 8,
																				 Qt::KeepAspectRatio,
																				 Qt::SmoothTransformation
																				 );
					abc.setPixmap(scaledPix);
					abc.show();

i have this :

so the error come from "QPixmap pix" who is empty

so the line "QPixmap pix( ci.ImageName );" dont create a pixmap from my QMap ?