From python to qml

Pablo J. Rogina

I don't know what to do :/ !

So you won't do anything? :-(

If a template engine is too much, why don't you try with string.Template? have you look at the example I suggested? Have you look for more examples?

Akhou

@Pablo-J.-Rogina said in From python to qml:

string.Template

I have to do something, but genshi seems to be hard and there isn't alot of examples online, so I'll see what can I do with string.template

Thank u

Akhou

But is string.Template able to generate a .qml file??

SGaist

A qml file is just a text file. So you can write your "string rendered template" in it and be done with it.

Akhou

so for this example

import string 
v={'var1':'screen'}
x=string.Template("""
{
id      :$var1
width   :22
height  :123
            """)
print'Item: ', x.substitute(v)
y="""
{
 id      :$sm1
 x       :11
 y       :8
 width   :12
 height  :65

  }
}  
 """
print 'Rectangle ' , y%v

I wanted to add to it "string rendered template" but I couldn't figure where to place it exactly, I tried to work with this example :

from flask import Flask, render_template
from flask import request, jsonify

app = Flask(__name__)

@app.route('/', methods=['GET', 'POST'])
def homepage():
    if request.method == 'POST':
        f1 = request.form['firstVerb'] 
        f2 = request.form['secondVerb']
    return render_template('index.html', f1=f1, f2=f2)
    
if __name__ == "__main__":
   app.run(debug=True)

but I keep getting this message :

Restarting with stat

Could u pls show me how to integrated rendered template to my example!
Thank u ^^

SGaist

Are you trying to render QML through a web browser ?

SGaist

Flask already uses jinja for templating as shown in their tutorial.

Akhou

no, I need to generate a .qml file from my template( that I mentioned in the previous text), but it's just an example that I found online, I wanted to try it, but I kept having this message : Restarting with stat
So I'm kinda out of ideas!

Akhou

This is what I came with till now:

  if shape == "rectangle":
            x,y,w,h = cv2.boundingRect(c)
            cv2.rectangle(image,(x,y),(x+w,y+h),(0,255,0),0)
            from string import Template
            from string import Template
            def main():
                cordinates=[]
                cordinates.append(dict(abscisse=x,ordonee=y,width=w,height=h))
                t=Template("""
            x: $abscisse
            y: $ordonee
           w: $width
           h: $height
                       """)                
                print '    Rectangle:'
                print("      {")
                for data in cordinates:
                    print (t.substitute(data))
                    print("      }")
            if __name__=="__main__":                
                main()

and from this template I need to generate a .qml file!
any ideas!!

Pablo J. Rogina

@Akhou the idea is to have a text file as template using QML syntax and some placeholders, and then process that file filling such variables with the results of your calculations. This is a basic example that will create a main.qml file:

template.py

import string

if __name__ == '__main__':

    # Open template file and pass string to 'data'.
    # Will be in QML syntax except with the string.Template replace tags
    # with the format of '$var'. The 'var' MUST correspond to the items
    # that will be calculated (i.e. coordinates, sizes, ids, etc.)
    with open('qml_template.txt', 'r') as my_template:
        data = my_template.read()
        # Print template for visual cue.
        print('Template loaded:')
        print(data)
        # Pass 'data' to string.Template object data_template.
        data_template = string.Template(data)

    # Do the process for shape detection and coordinate calculation
    # ...

    # For the sake of simplicity, here values are stored in a dictionary
    values = dict(x=10, y=20, w=200, h=100)

    # Open QML output file and fill its contents by string substitution
    with open("main.qml", 'w') as output_file:
        # Run string.Template substitution on data_template
        # using data from 'values' as source and write to 'output_file'.
        output_file.write(data_template.substitute(values))
        output_file.close()

    # Print QML generated code for visual cue.
    with open('main.qml', 'r') as my_qml:
        qml_code = my_qml.read()
        print('QML code generated:')
        print(qml_code)

qml_template.txt

import QtQuick 2.2

Item {
    id: it
    width: 600
    height: 480

    Rectangle {
        id: rect
        x: $x
        y: $y
        width: $w
        height: $h
    }
}

and the rest is magic...

Akhou

I can't thank u enough for ur help
Thank u so much

Pablo J. Rogina

@Akhou well, at least you could:

Upvote the answer(s) that helped you to solve the issue
Use the "Topic Tools" button to mark your post as Solved

:-)