Envelopes.py

'''
An interactive linear (no curves) envelope

It is meant to integrate with timelines

Interaction:
    * DoubleClick to add points
    * RightClick on points to remove them
    * LeftClick+Drag a point to move it and any selected points
    * LeftClick+Drag to select multiple points (selection box)
    * Ctrl+LeftClick+Drag to add multiple points to selection (selection box)
    * Ctrl+LeftClick on point to add/remove to/from selected points
    * Ctrl+A to select all points
    * Shift+A to de-select all points
    * Ctrl+Shift+A Invert point selection
    * Delete key will remove selected points
'''
from PySide6.QtCore import *
from PySide6.QtGui import *
from PySide6.QtWidgets import *
from daw_tools import LinearEnvelope
import math
app = QApplication([])

# Creating the display window
window = QWidget()
window.setWindowTitle('Daw Tools Linear Envelope')
window.setMinimumWidth(822)
window.setStyleSheet("""
background-color: rgb(60, 60, 60);
""")

# Window layout
l = QGridLayout()

env = LinearEnvelope(-100,100)# minimum = -100, maximum = 100
env.setStyleSheet("""
background-color: rgb(80, 80, 80);
""")
# Setting brush for all de-selected points
env.setDeSelectedBrush(QBrush(Qt.blue))
# Adding some points with a sin function
# also settings this points de-selected brush as addPoint() returns the point
for i in range(80): env.addPoint((i+5)*9,math.sin(i)*15).setDeSelectedBrush(QBrush(QColor(255,0,0)))
# adding and storing a point in a variable
point = env.addPoint(25,100)# x=25, value=100
# moving point to x=250, value=-100
env.movePoint(point, 250, -100)
# setting point de-selected Pen (outline)
point.setDeSelectedPen(QPen(Qt.yellow,5))
# setting point selected Pen (outline)
point.setSelectedPen(QPen(Qt.red,10))
l.addWidget(env,1,0)

# Adding layout to the window
window.setLayout(l)

# Showing the window
window.show()

exit(app.exec())