How to include .txt on Qt

[Payx]

I placed breakpoint on

  for(int x = topLeft.x(); x < maxX; ++x) {
    for(int y = topLeft.y(); y < maxY; ++y) {
      image.setPixelColor(x, y, colour);

      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 );
        }

because its new and before it worked.

And nothing who looks like a crash happened. So i don't understand, maybe it is just a big picture (540 * 540) and the app have difficult to do the code

EDIT : i tried to increase the rectangle size, it worked.

but dont replace the color by a picture

and it say that int cost is an unused variable

[mrjj]

Hi
In the inner
CostInfo& ci = Costs[colour.rgb()];
int Cost = ci.Cost; // not used for anything
QPixmap pix( ci.ImageName ); // not used for anything
}

it was just for getting the data from the Costs qmap.
You still need to code what ever you want to do with it :)
Currently it just check if color is a match and even if yes, then nothing.

[Payx]

so if i understood well

int Cost = ci.Cost; /// the Cost in my Qmap
QPixmap pix( ci.ImageName ); /// the picture into a Pixmap

The problem is that the rectangle that i use to calcul the DominantColor isn't a Label or something, so how can i replace a picture into a virtual rectangle ?

[mrjj]

@Payx
Yes those are the values from the qmap.

• so how can i replace a picture into a virtual rectangle

Sorry but Im not sure what kind of operation you want to do.
For each dominánt color for an area. you want to paint all of that area
with this color? Like paint 0,0,40,40 with same color. ?

[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.