How to include .txt on Qt

[Payx]

My program already do that :

http://hpics.li/c00cce7

but what i want is that for each rectangle that my picture have, it will replace this rectangle of color by a picture in my QMap (like if the rectangle's color is near the red, it will replace by the picture fraise.png and add a Cost)

[mrjj]

@Payx
You mean that the red squares would be pictures instead?
The painter has drawPixmap
http://doc.qt.io/qt-5/qpainter.html#drawPixmap
You can fit the image to the rect.

[Payx]

All square would be picture, the picture depends of the color.

If its red we see in the QMap that the picture is fraise.png
if its green -> balle verte.png

i think i dont need "QRectF target" or "source"

because i have already this

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

when im on the for i'm already in the square.

[mrjj]

ok. that sounds fine.
I assume you need to scale the pictures down to fit in the
area. ?
You can use scaled function.

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

painter.drawPixmap(QPoint(), scaledPix);

[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 ?