Graphics Functions

d.healey

I'm interested in exploring these functions but have got stuck at the very beginning.

The code below gives me the error onInit() - Line 7, column 21: Unknown function 'drawEllipse'.

Content.setHeight(500);

const var area = Content.addPanel("area", 0, 0);
area.set("width", 600);
area.set("height", 500);

Graphics.drawEllipse(area, 2);

d.healey

Typical, I make a post then I get somewhere a few minutes later :p

I'll leave this here for anyone else who needs it.

Content.setHeight(150);

var area = Content.addPanel("area", 0, 0);

// [/JSON area]
area.set("width", 150);
area.set("height", 150);

// Define a paint routine
area.setPaintRoutine(function(g)
{
	g.setColour(4294901730);
	g.drawEllipse([10, 10, 100, 100], 5); //x, y, width, height, border size
	g.drawEllipse([30, 40, 20, 20], 5); //x, y, width, height, border size	
	g.drawEllipse([70, 40, 20, 20], 5); //x, y, width, height, border size	
	g.drawTriangle([55, 60, 10, 10], 0, 3);
	g.drawLine(45, 75, 90, 90, 5);
});

Christoph Hart

Its called rubber duck debugging :)

d.healey

Is there a way to draw an elliptical drop shadow? Also is there a function that can be used to rotate a panel, basically I have a knob with a little dot that I'd like to rotate around when dragged.

Here is the image version but I'd like to do it entirely with vectors within HISE if possible. So far I've created the paint routine to draw the knob statically but I'm not 100% sure how to proceed with the rotation.

alt text

Dominik Mayer

i also tried a bit around with the ScriptPanelTutorial > 3.4 A vectorized knob
but i think C. would have to add/implement something like:
void addRoundedRectangle from https://www.juce.com/doc/classPath for it to work..
best,d

d.healey

Could you add a property to the g.drawText(); function to allow us to change the horizontal alignment?

Christoph Hart

I need to add another function as you can't "overload" methods in Javascript and I need to keep the old function prototype for backward compatibility.

But I'll add something like:

g.drawAlignedText("Put me left", [0, 0, 100, 50], "centredLeft");

using the same strings as the Label for alignment. The g.drawText() method stretches the font to the height of the passed in area (and I doom the day that I decided it to do so), so I wanted to add another g.drawText method anyway.

As for rotation, I'll add a function that rotates the whole canvas. Then you can do funny things like this:

// Rotate it by 20%
g.rotate(-0.2 * Math.PI * 2);

// Draw something
g.fillRect([20, 80, 10, 10]);

// Rotate it back
g.rotate(0.2 * Math.PI * 2);

For the drop shadow, play around with g.addDropShadowFromAlpha(int colour, int radius):

const var Panel = Content.addPanel("Panel", 63, 9);
Panel.set("height", 100);

Panel.setPaintRoutine(function(g)
{
	// 1. Draw the shape of your drop shadow
	g.setColour(Colours.white);
	g.fillEllipse([20, 20, 40, 40]);
	
	// 2. Add the drop shadow
	g.addDropShadowFromAlpha(Colours.white, 10.0);
	
	// 3. Draw your actual object
	g.setColour(Colours.black);
	g.fillEllipse([20, 20, 40, 40]);
});

d.healey

Excellent, I'm currently rebuilding my entire GUI with native HISE vectors. Everything's working really well and scales beautifully!

d.healey

Just to show you what I'm up to, this is my GUI now and everything, with the exception of the knobs, has been created using panels and paint routines.

alt text

Christoph Hart

Alright, there you go:

- added `g.rotate()` function to rotate the painting canvas · christophhart/HISE@b7d6f80

The open source framework for sample based instruments - - added `g.rotate()` function to rotate the painting canvas · christophhart/HISE@b7d6f80

GitHub (github.com)

knob

This is the example code.

Content.makeFrontInterface(600, 500);

// Just so that you can see the drop shadow :)
const var bg = Content.addPanel("bg", 3, 4);
// [JSON bg]
Content.setPropertiesFromJSON("bg", {
  "width": 100,
  "height": 100,
  "itemColour": 4285415745,
  "itemColour2": 4285547331
});
// [/JSON bg]

const var Panel = Content.addPanel("Panel", 20, 20);
// [JSON Panel]
Content.setPropertiesFromJSON("Panel", {
  "width": 50,
  "allowCallbacks": "Clicks, Hover & Dragging"
});
// [/JSON Panel]

Panel.setPaintRoutine(function(g)
{
	// 1. Draw the drop shadow
	g.setColour(0x88000000);
	g.fillEllipse([6, 2, this.getWidth()-10, this.getHeight()-10]);
	g.addDropShadowFromAlpha(0x88000000, 8);
	
	// 2. Draw the knob
	g.setColour(Colours.grey);
	g.setGradientFill([0xFF666666, 0.0, 0.0, 0xFF444444, 0.0, 50.0]);
	g.fillEllipse([5, 0, this.getWidth()-10, this.getHeight()-10]);
	
	// 3. Rotate the canvas. 
        // Note that the pivot centre is not the mid point of the panel because the ellipse is smaller
	g.rotate(this.getValue() * 1.5 * Math.PI, [25, 20]);;
	
	// 4. Draw the dot
	g.setGradientFill([0xFF111111, 0.0, 0.0, 0xFF222222, 0.0, 50.0]);
	g.setColour(0xaa000000);
	g.drawEllipse([15, 25, 7, 7], 1.0);;
	g.fillEllipse([15, 25, 7, 7]);
});


Panel.setMouseCallback(function(event)
{
	if(event.clicked)
	{
		this.data.mouseDownValue = this.getValue();
	}
	else if (event.drag)
	{
		var distance = event.dragX - event.dragY;
		
		// change this for sensitivity
		var normalisedDistance = distance / 200.0; 
		
		var newValue = Math.range(this.data.mouseDownValue + normalisedDistance, 0.0, 1.0);

		this.setValue(newValue);
		this.changed();
		this.repaintImmediately();
	}
});

d.healey

Yippie!!!!

Dominik Mayer

Nice one.

Christoph Hart

And I added g.drawAlignedText():

Content.makeFrontInterface(600, 500);
const var Panel = Content.addPanel("Panel", 24, 30);
// [JSON Panel]
Content.setPropertiesFromJSON("Panel", {
  "width": 214,
  "height": 136
});
// [/JSON Panel]

Panel.setPaintRoutine(function(g)
{
	// I can't help myself...
	g.setFont("Comic Sans MS", 24.0);
	
	g.setColour(Colours.white);
	g.drawAlignedText("Funky Alignment", [0, 0, this.getWidth(), this.getHeight()], "centredTop");
});

tshoats

I'm starting to love this framework more and more, these vector api calls remind me of scripting CSS3 with javascript :) . Awesome. David are those black menus HISE native or are those images???

d.healey

The black dropdown is HISE native.

tshoats

Ok thanks.

d.healey

If I want the knob panel range to be -100 to 100 (or anything other than 0.0-1.0), is the best approach to leave it as 0-1 and use a linear interpolation function to convert the normalized value to the desired range? Or can I just set the knob/panel's min/max to the desired ranged and make some slight adjustment to the algorithm?

Christoph Hart

Just scale it using basic math:

var normalizedValue = Math.range(this.data.mouseDownValue + normalisedDistance, 0.0, 1.0);

var value = this.data.min + normalizedValue * (this.data.max - this.data.min);

this.setValue(value);

d.healey

Excellent, thanks.

I did it a little differently to how you suggested so I'll paste my altered version here. I'm storing the normalized value as well as the actual value so that I can use one for the paint routine rotation and the other for setting parameters. I also added support for double click to set the knob to 0.

HiseSnippet 1494.3ocsW8+aZbCE+HMHMXCo0o8GfE+vzwFkdPfjrTUslPBsocIEU5R6TTTm4NCmUty9jOCDZU9ed+Gr8r8cbGTRVYZyJPvuu32m2yum8y8EbWRbLWXU3qe67HhUguo3f4LoeWeLkYc5wVEpT7UL9vStAGFEPrNZdDNNl3YUnvCdtRjBk11RO9ye4Hb.l4RxHYYcAm5R9UZHUlQ8Od1qnAA8vdj2RCyIc6mcpKm0kGvm.v4AEcrhvtWiGSNGqDaqhVSojYwVEbJtSqFhqaN7iG1Habjyzme36a68yC7Uj6pn0WKfk6DgfvjW.paUnXg+BFEJdhGUxECjXIAVysOh6MefOeFyX5Knwzgf+BSZZM.vjg7oLIQLB6RxIpUWeZfW+zHYrErZ8yhqOvDW+9hmQ8nKnmEe+VMCTlF4CwE159fYy6Bl83AdpE3NfWgbvaaC7dXwAtBZjLiiBaeWB06.cFlVacXohc4PjgIaDhulzS.SVDor20woNpiiSsmTobkxO9wnWNIVhh4HoOVhlymfbwLTLg.DHHOAOBE6i83yPGTqRYHk.jdJVfFNF8TTpcvdd8wLRfc0giqVGsScTSm1JK.q+kubvqOGD+pJkSEOln7rHhPRIw.9BUhjn6mpTFgpNi5I8qd.rLN00D7Izw9x7TnRRnI8Dn1t09cZ2ryds6rJyVIb6zduc1oYkx2lBqGmgq79k1OVqqo+GfvVP.rYKmkbOMu+YOLcIV1I6j3Q3f.9rtv2CgJsXfQ0tAT3W0QufOkHP+.5XAd7XJChSZEBorpG7nEQjP7MUO.l8YNYJ5pTV+KM5fDd4a3SjTFwdzDlqjxY1igsX.ak.Ua1PYsYqlE.LGqz2DbsctY+8czCkEAVifCSNIHfFESrubWHXUGVAZbiwD46TtqcM.uYzdgdaUS7pjU.B3GC1af1bpP2gAQ93bVpNZesnFb1JGNuFNZbE.Z9GXKAYdhA.lOWf8nv9TO.s1W5bSud6pG0QNMbR+Bn1VORHzA99p04lc.A1P2zf8cZfdCWcVhF8Pc2TbbCjZuzL.QNmq4BklJQhnS4RjKfbAAQiQLtgdH0CEwgcTDejQPcV7PhKdRrY0IFzpzJNDxwHBsiHz12VCTOrD2fwE.a5GIdWfClPP+HjIrK78YXoei9mVGcYqNpZ.vOxbj14SV3x6NL2TOVML2ROVSXNehFFuThlGXuE6.MUPB9rG72UP0YCGC5VYiZIwTqyslSAyUWbFGBXo0fYEFjofajTbPGYl1vUUcR7.xkTzKkEDCUqxwv8BlX3SQ2Y7UgxagOj.0dyHTxR6wm.WjnK+Wyxu5dzSgHWmmrPFvMzzsMwJCQWeLaLwyNGIAIRcJvoggDOJjEDLG3td3.m6r.GpSI8nwRU2Efoyj38nGka1uqMj5CjfXrtNLfFwEv8KrXpjNkJmmtjINEbY1wYK9B6.E5NPhwSPoKZNUxEGzYoBksruycieZMlJI2Sm3nxGt+n8+EVAJt+s3jHxTsFTFRuefDlik0AJc8IjAtjaSlsTdEb.is9tfZYVMW8qcNgfaHpA6RqnVsEaUv8Ww7.RiHA.D6TCkwe47qk4uQoYlzdn9KsDCwYpy5dMytV4OUtT4aKuJmQiVGK0MtBt57r0wU0Sq3dTylMIbHQT2rEjJGzp1xM5U9KqQOWys+4DjyNkQkuNhrXtwISo3Xsv4xSJyoxSU6LqQrLRed2kVIcj.+5yayDZ1k6MI.KWtCX0KIRX.Aqk5wT0Gopxcd9WZrAsE6r11hatNf+EB2GVrOU55ud7t0ZvKzw8+23M4QFUJdxnQDWYFX2tXu2+u8EEa.TL80MFNlRPuAdi04SBG.Wh5R.jvfK5hUu6ZKUxgYtiZtJxLfv7bReTVBylp4ERX1LkoUH1Uv+fqICT8LluRSAvDS+.wREOSMG0zRWZYvMzmB8Cttp.wi.judMZswZryFqQ6MViNarF6twZr2Fqw92iFpGxd3DIOzTVXY82vSTZpf

d.healey

Christoph, is there way to prevent the panel knobs and sliders from resetting to zero every time the script is compiled or the preset is loaded? I've tried with the knob example you posted.

Graphics Functions

- added `g.rotate()` function to rotate the painting canvas · christophhart/HISE@b7d6f80

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