CircularGauge Look

[Mulderone]

Hi,

i try to create a circular Gauge like this

CircularGauge.png (10.18 KiB) Viewed 34856 times

How to make a 180°circular instead full circle, by default ?

How to change the needle look ?

Thanks for your help

[mts]

Circular gauge will always be a full circle, though you can set where the data ticks start by using setRotationAngle and setTotalAngle. If you want a 180 gauge use the regular Gauges series.

[Yeray]

Hi Mulderone,

I get the gauges in the image below with the following code:

Code: Select all

		tChart1.getHeader().setVisible(false);
		tChart1.getPanel().setColor(Color.fromArgb(167, 200, 85));
		Gauges gauges1 = new Gauges(tChart1.getChart());
		gauges1.setTotalAngle(180);
		gauges1.setRotationAngle(180);
		gauges1.setMaximum(120);
		gauges1.setValue(60);
		gauges1.getVertAxis().getLabels().setVisible(false);
		gauges1.getVertAxis().setIncrement(10);
		gauges1.getVertAxis().getTicks().setLength(10);
		gauges1.getVertAxis().getTicks().setWidth(3);
		gauges1.getVertAxis().getTicks().setColor(Color.WHITE);
		gauges1.getVertAxis().getMinorTicks().setVisible(false);
		gauges1.getVertAxis().getAxisPen().setVisible(false);
		gauges1.getPen().setColor(Color.WHITE);
		gauges1.getCenter().getPen().setVisible(false);

Gauges.png (9.25 KiB) Viewed 34790 times

[Mulderone]

Marvellous!!!!

Thanks for your help

[Mulderone]

Hi Yeray,

it works but i'm using the android version of this library and i have a half-circle at the bottom which remains.

I don't know how to disable it , to obtain the same chart as you

[Mulderone]

i give you a screen capture of my android app, as you see , i have a gray semi circle at the chart's bottom

android_circular.png (7.01 KiB) Viewed 34816 times

[Yeray]

Hi Mulderone,

It seems there's a bug here. I'm trying to find a definitive fix.
In the meanwhile, since you are source code customer, you could apply a temporal fix manually. In Graphics3DAndroid.java (in com/steema/teechart/android/), you'll find the arc method says:

Code: Select all

	public void arc(int x1, int y1, int x2, int y2, final double startAngle,
			final double sweepAngle) {
		canvas.drawArc(new RectF(x1,y1,x2,y2), (float)startAngle, (float)sweepAngle, 
			false, pen.getPaint());
	}

Change the above for the following, just adding a condition:

Code: Select all

	public void arc(int x1, int y1, int x2, int y2, final double startAngle,
			final double sweepAngle) {
		if (pen.visible) {
			canvas.drawArc(new RectF(x1,y1,x2,y2), (float)startAngle, (float)sweepAngle, 
					false, pen.getPaint());
		}
	}

[Mulderone]

i'll try that and i'll keep you in touch

[Mulderone]

It works, the bottom semi-circle disappear.

But i think that the overall rectangle size must be calculated again , to fit the inside draw, as the screen shot you put in your previous reply

[Yeray]

Hi Mulderone,

Right. That's what I've just done. It will be fixed with the next maintenance release.
If you need the changes tell me and I'll send/explain you.

[Mulderone]

Hi,

yes, until the next delivery, it would be nice if you send me or explain the solution

Best regards

[Yeray]

Hi Mulderone,

I'll send you the changes to the mail account you have registered in this forum.

[Mulderone]

Yeray,

it doesn't work. The rectangle which contains the drawing circle is the same as my previous post as if the circle is complete instead of a wanted semi-circle.

[Yeray]

Hi Mulderone,

I've just verified it.This is my testing application:

Code: Select all

package com.steema.test;

import android.app.Activity;
import android.os.Bundle;
import android.widget.LinearLayout;

import com.steema.teechart.TChart;
import com.steema.teechart.drawing.Color;
import com.steema.teechart.styles.Gauges;

public class AndroidTestActivity extends Activity {

	private TChart tChart1;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		LinearLayout group = (LinearLayout) findViewById(R.id.linearLayoutTchart);

		createChart(group);
		initializeChart();
	}

	private void createChart(LinearLayout group) {
		tChart1 = new TChart(this);
		group.addView(tChart1);
	}

	private void initializeChart() {
	      tChart1.getHeader().setVisible(false);
	      tChart1.getPanel().setColor(Color.fromArgb(167, 200, 85));
	      Gauges gauges1 = new Gauges(tChart1.getChart());
	      gauges1.setTotalAngle(180);
	      gauges1.setRotationAngle(180);
	      gauges1.setMaximum(120);
	      gauges1.setValue(60);
	      gauges1.getVertAxis().getLabels().setVisible(false);
	      gauges1.getVertAxis().setIncrement(10);
	      gauges1.getVertAxis().getTicks().setLength(10);
	      gauges1.getVertAxis().getTicks().setWidth(3);
	      gauges1.getVertAxis().getTicks().setColor(Color.WHITE);
	      gauges1.getVertAxis().getMinorTicks().setVisible(false);
	      gauges1.getVertAxis().getAxisPen().setColor(Color.RED);
	      gauges1.getVertAxis().getAxisPen().setWidth(1);
	      gauges1.getPen().setColor(Color.WHITE);
	      gauges1.getCenter().getPen().setVisible(false);
	}
}

The code above, with TeeChart Java for Android v3.2012.0202, gives me the following result:

wrong.png (8.13 KiB) Viewed 34740 times

With the changes I sent you, it changes to this:

ok, red.png (8.22 KiB) Viewed 34738 times

Then, if I add the following line:

Code: Select all

	      gauges1.getVertAxis().getAxisPen().setVisible(false);

This is what I get (TeeChart Java for Android v3.2012.0202 with TJ71016219 fix):

ok.png (6.23 KiB) Viewed 34750 times

Could you please check it again? Please, make sure you make a full Clean&Rebuild.

[Mulderone]

yes, me too, i do exactly what you ask me to do.

So, the resulting chart as the same size as before as if only the bottom semi-circle isn't drawn but the used space already exist.

What i expect is a "packed" semi-circle, without the bottom space which has the same size as the upper semi-circle