How to include .txt on Qt

[Payx]

So i have to rezise the picture or it will do automaticaly ?

i don't understand what the function do

[mrjj]

No, you will have to resize it, else it will be exactly as in the file.( I assume too big)
the scaled function returns a copy of the pixmap that is scaled to
WIDTH, HEIGHT. so it will fit in your area.

[Payx]

so if my rectangle is 8*8 tell me if it's correct :

QPixmap scaledPix = pix.scaled(   8, 8
                               Qt::KeepAspectRatio,
                               Qt::SmoothTransformation
                               );

painter.drawPixmap(QPoint(i,j), scaledPix);

just that ?

[mrjj]

Yes , that should draw image as 8x8 at i,j.
Note the flag Qt::KeepAspectRatio which means it might not be 8x8 directly but
maybe 8x6 if the original images was not square. AspectRatio means keep the relation between height and width.

[ambershark]

@mrjj 104 posts on this thread... you are a patient person mrjj. ;) I would have just written the program for him by now, lol.

[Payx]

@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 !

for the QPoint, i use it here :

void MainWindow::on_push2_clicked()
{


	for (int i=0;i<pixi.width();i+=z){
						 for (int j=0;j<pixi.height();j+=z){
							 k=k+0.06;
							Remplissage(pixi,QPoint(i,j),QSize(z,z),Couleurdominante(pixi,QPoint(i,j),QSize(z,z)));

		}
	}

but i use the QPixmap scaledPix .....
in my function

void Remplissage(QImage& image, const QPoint& topLeft, const QSize& rectangle, const QColor& colour) {

so it tell that j and i was not declared in this scope

so i declared i and j in my .h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QPixmap>
#include <QPoint>
#include <QSize>
#include <iostream>
#include <QMapIterator>
#include <QMap>

namespace Ui {
class MainWindow;
}

struct CostInfo {
  QString ImageName;
  int     Cost;
};

int j;
int i;

class MainWindow : public QMainWindow {
  Q_OBJECT

 public:
  explicit MainWindow(QWidget* parent = 0);

  ~MainWindow();

 private slots:
  void on_push_clicked();
  void on_push2_clicked();
  void on_verticalSlider_sliderMoved(int position);

 private:
  Ui::MainWindow* ui;
  QImage pixi;
  QPixmap pixa;
  float k;
  int a;


  int z = 1;
  int b;
};

#endif // MAINWINDOW_HH

it will work?

//

it tell that painter was not declared too, so i search to the QPainter class,

it's "void QPainter::drawPixmap(const QPoint & point, const QPixmap & pixmap)" that i should use ?

[mrjj]

Hi
hehe @ambershark , yes that would be faster but in this case,
declaration and scopes are part of the exercise so hence the amount of posts. :)

@Payx
The j and is local variable in your for loops
Yes it will work to make them member of the class but you actually give them to
Remplissage via the QPoint(i,j)
Remplissage(pixi,QPoint(i,j),QSize(z,z),Couleurdominante(pixi,QPoint(i,j),QSize(z,z)));
so inside the Remplissage function, i and j are
int i = topLeft.x();
int j=topLeft.y();

• it tell that painter was not declared too, so i search to the QPainter class,
  Did you #include<QPainter> ?

Calling it like
painter.drawPixmap(topLeft, scaledPix);
should work.

[Payx]

Yes i have already test with include QPainter, same error ^^

[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