Steema Central

Posted: **Wed Mar 08, 2006 2:05 pm**

Current Version of TeeChart - Pocket flicker heavy after adding a point into a serie (fastline!). Is there a solution to avoid this flicker ? In the earlyer versions this problem does't occur!

Here my code:

Code: Select all


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Steema.TeeChart.Pocket;
using Steema.TeeChart.Tools;


namespace TeeChartV2Test
{
    public class Form1 : Form
    {
        private Steema.TeeChart.Styles.Line m_teechartLine1 = null;
        private DateTime m_dtStart = DateTime.Parse("08.03.2006 13:00");

        /// <summary>
        /// Erforderliche Designervariable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;
        private System.Windows.Forms.MainMenu mainMenu1;

        /// <summary>
        /// Verwendete Ressourcen bereinigen.
        /// </summary>
        /// <param name="disposing">True, wenn verwaltete Ressourcen gelöscht werden sollen; andernfalls False.</param>
        protected override void Dispose ( bool disposing )
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose( disposing );
        }

        #region Vom Windows Form-Designer generierter Code

        /// <summary>
        /// Erforderliche Methode für die Designerunterstützung.
        /// Der Inhalt der Methode darf nicht mit dem Code-Editor geändert werden.
        /// </summary>
        private void InitializeComponent ()
        {
            this.mainMenu1 = new System.Windows.Forms.MainMenu();
            this.m_MyTeeChart = new Steema.TeeChart.Pocket.TChart();
            this.button1 = new System.Windows.Forms.Button();
            this.button2 = new System.Windows.Forms.Button();
            this.tmrAddValues = new System.Windows.Forms.Timer();
            this.SuspendLayout();
            // 
            // m_MyTeeChart
            // 
            this.m_MyTeeChart.AutoRepaint = true;
            this.m_MyTeeChart.Location = new System.Drawing.Point( 3, 3 );
            this.m_MyTeeChart.Name = "m_MyTeeChart";
            this.m_MyTeeChart.Size = new System.Drawing.Size( 214, 220 );
            this.m_MyTeeChart.TabIndex = 0;
            this.m_MyTeeChart.Text = "tChart1";
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point( 3, 229 );
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size( 64, 33 );
            this.button1.TabIndex = 1;
            this.button1.Text = "button1";
            this.button1.Click += new System.EventHandler( this.button1_Click );
            // 
            // button2
            // 
            this.button2.Location = new System.Drawing.Point( 119, 233 );
            this.button2.Name = "button2";
            this.button2.Size = new System.Drawing.Size( 98, 29 );
            this.button2.TabIndex = 2;
            this.button2.Text = "button2";
            this.button2.Click += new System.EventHandler( this.button2_Click );
            // 
            // tmrAddValues
            // 
            this.tmrAddValues.Interval = 1000;
            this.tmrAddValues.Tick += new System.EventHandler( this.timer1_Tick );
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF( 96F, 96F );
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Dpi;
            this.AutoScroll = true;
            this.ClientSize = new System.Drawing.Size( 234, 275 );
            this.Controls.Add( this.button2 );
            this.Controls.Add( this.button1 );
            this.Controls.Add( this.m_MyTeeChart );
            this.Location = new System.Drawing.Point( 50, 50 );
            this.Menu = this.mainMenu1;
            this.Name = "Form1";
            this.Text = "Form1";
            this.ResumeLayout( false );

        }
        #endregion

        private Steema.TeeChart.Pocket.TChart m_MyTeeChart;
        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.Button button2;
        private System.Windows.Forms.Timer tmrAddValues;

        public Form1 ()
        {
            InitializeComponent();
        }

        private void button1_Click ( object sender, EventArgs e )
        {
            InitializeTeeChart();
        }

        /// -------------------------------------------------------------------
        /// <summary>
        /// Method name		:	InitializeTeeChart
        /// Author			:	TJo
        ///	Date			:	11.10.2005
        /// </summary>
        /// -------------------------------------------------------------------
        private void InitializeTeeChart()
        {
            m_MyTeeChart.Legend.Visible = true;
            m_MyTeeChart.Aspect.View3D  = false;
            m_MyTeeChart.AutoRepaint    = false;

            // move legend
            m_MyTeeChart.Legend.LegendStyle = Steema.TeeChart.LegendStyles.Series;
            m_MyTeeChart.Legend.Alignment   = Steema.TeeChart.LegendAlignments.Bottom;
            m_MyTeeChart.Legend.Left        = 0;

            // create axies
            m_MyTeeChart.Axes.Left.Automatic    = false;
            m_MyTeeChart.Axes.Left.Minimum      = 0;
            m_MyTeeChart.Axes.Left.Maximum      = 100;
            m_MyTeeChart.Axes.Left.Grid.Visible = true;

            m_MyTeeChart.Axes.Right.Grid.Visible = false;
            m_MyTeeChart.Axes.Right.Automatic    = false;
            m_MyTeeChart.Axes.Right.Minimum      = 0;
            m_MyTeeChart.Axes.Right.Maximum      = 100;
            m_MyTeeChart.Axes.Right.Visible      = true;

            
            m_MyTeeChart.Axes.Bottom.Grid.Visible = true;
            m_MyTeeChart.Axes.Bottom.Automatic    = false;
            m_MyTeeChart.Axes.Bottom.Minimum      = DateTime.Parse("08.03.2006 13:00").ToOADate();
            m_MyTeeChart.Axes.Bottom.Maximum      = DateTime.Parse( "08.03.2006 13:20" ).ToOADate();


            Steema.TeeChart.Axis axisCustom = new Steema.TeeChart.Axis( m_MyTeeChart.Chart );
            axisCustom.Grid.Visible         = false;
            axisCustom.OtherSide            = true;
            axisCustom.PositionUnits        = Steema.TeeChart.PositionUnits.Pixels;
            axisCustom.RelativePosition     = -50;
            axisCustom.Automatic            = false;
            axisCustom.Minimum              = 0;
            axisCustom.Maximum              = 100;
            axisCustom.Visible              = true;
            m_MyTeeChart.Axes.Custom.Add( axisCustom );

            // resize chart cause of CustomAxis 
            m_MyTeeChart.Panel.MarginRight = 8;

            // add line
            m_teechartLine1 = new Steema.TeeChart.Styles.Line( m_MyTeeChart.Chart );
            // m_teechartLine1.DrawAllPoints = false;
            m_teechartLine1.Visible         = true;
            m_teechartLine1.VertAxis = Steema.TeeChart.Styles.VerticalAxis.Left;
            m_teechartLine1.LinePen.Width = 5;

            // set date/time format 
            m_teechartLine1.XValues.DateTime              = true;
            m_MyTeeChart.Axes.Bottom.Labels.DateTimeFormat = "dd.MM.yyyy\nHH:mm";
            m_MyTeeChart.Axes.Bottom.Labels.MultiLine      = true;
            

        }

        private void button2_Click ( object sender, EventArgs e )
        {
            tmrAddValues.Enabled = !tmrAddValues.Enabled;
        }

        private void timer1_Tick ( object sender, EventArgs e )
        {
            m_dtStart =  m_dtStart.AddMinutes( 1 );
            m_MyTeeChart.AutoRepaint = false;
            Random rnd = new Random();
            m_teechartLine1.Add( m_dtStart, rnd.Next( 0, 100 ) );
            m_MyTeeChart.AutoRepaint = true;
            m_MyTeeChart.Refresh();
        }
    }
}

Posted: **Wed Mar 08, 2006 2:47 pm**

I have found a smal workaroud for this problem! Perhaps it may be useful for others

Code: Select all

/*****************************************************************************	 
                      (C) Copyright by VESCON GmbH 
																				                      
 Module   : TeeChartEx.cs
 SCCS     : $Archive: $ $Revision:  $
 Author   : TJo
 Date     : 08.03.2006
 Last Change : $Date: $ $Author: $  
 Description : 

 Known problems :

 Modification history :
     Date   | Usr.| Comment
   ---------+-----+----------------------------------------------------------	 
            |     |
******************************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Windows.Forms;
using Steema.TeeChart.Pocket;

namespace FIChart.Controls
{
    /****************************************************************************
    Class name     :  TeeChartEx
    Author         :  
    Date           :  
    Description    :  

    Known problems :

    Modification history : 

      Date   | Usr.| Comment 
    ---------+-----+----------------------------------------------------------
             |     | 
    ****************************************************************************/
    /// <summary>
    /// Class TeeChartEx
    /// </summary>
    public class TeeChartEx : Steema.TeeChart.Pocket.TChart
    {
        //---------------------------------------------------------------------
        // -- local members
        #region local members
        private Bitmap m_bmpBitmap = null;
        #endregion
        //---------------------------------------------------------------------

        /// -------------------------------------------------------------------
        /// <summary>
        /// Method name		:	OnPaintBackground
        /// Author			:	TJo
        ///	Date			:	08.03.2006
        /// </summary>
        /// -------------------------------------------------------------------
        protected override void OnPaintBackground ( PaintEventArgs e )
        {
        }

        /// -------------------------------------------------------------------
        /// <summary>
        /// Method name		:	OnPaint
        /// Author			:	TJo
        ///	Date			:	08.03.2006
        /// </summary>
        /// -------------------------------------------------------------------
        protected override void OnPaint ( PaintEventArgs e )
        {
            // check if bitmap is valid
            if (m_bmpBitmap == null)
            {// create first bitmap
                m_bmpBitmap = new Bitmap( this.ClientSize.Width, this.ClientSize.Height );
            }
            else
            {// check resize
                if ((m_bmpBitmap.Width != this.ClientSize.Width) || 
                    (m_bmpBitmap.Height != this.ClientSize.Height))
                {// create new bitmap
                    m_bmpBitmap = new Bitmap( this.ClientSize.Width, this.ClientSize.Height );
                }
            }

            // create new graphic for backbuffer
            Graphics g = Graphics.FromImage( m_bmpBitmap );

            // create eventargs for teechart
            PaintEventArgs evtPaintArgs = new PaintEventArgs( g, new Rectangle( 0, 0, m_bmpBitmap.Width, m_bmpBitmap.Height ) );

            // call base class
            base.OnPaint( evtPaintArgs );

            // draw image
            e.Graphics.DrawImage( m_bmpBitmap, 0, 0 );
        }
    }

}

Posted: **Mon Mar 13, 2006 2:30 pm**

Hi VESCON,

Thanks for reporting. We have been able to reproduce the problem here and fixed it for the next maintenance release.

Steema Central

TeeChart for Compact Framework Problem

TeeChart for Compact Framework Problem