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Bug 1118

Summary: ScrollBar tool WhenNeeded property doesn’t work when the scrollbar thumb is scrolled down.
Product: .NET TeeChart Reporter: sandra pazos <sandra>
Component: ToolsAssignee: Steema Issue Manager <issuemanager>
Status: CONFIRMED ---    
Severity: normal CC: mdegroof
Priority: Normal    
Version: unspecified   
Target Milestone: ---   
Hardware: PC   
OS: Windows   
Chart Series: --- Delphi / C++ Builder RAD IDE Version:

Description sandra pazos 2015-02-04 10:09:41 EST 
ScrollBar tool WhenNeeded property doesn’t work when the scrollbar thumb is scrolled down. Use the code below to reproduce the problem and resize or maximize the windows. 
  private void InitializeChart()
        {
            tChart1.Aspect.View3D = false;
            tChart1.Dock = DockStyle.Fill; 
            for (int i = 0; i < 30; i++)
            {
                new Steema.TeeChart.Styles.Line(tChart1.Chart);
                tChart1[i].FillSampleValues(10);

            }
            Steema.TeeChart.Tools.LegendScrollBar tool1 = new Steema.TeeChart.Tools.LegendScrollBar(tChart1.Chart);
            tChart1[0].Title = "Summer temperatures";
            int maxsizetext = tChart1[0].Title.Length; 
            tChart1.Legend.ColumnWidthAuto = false;
            tool1.DrawStyle = Steema.TeeChart.Tools.ScrollBarDrawStyle.WhenNeeded; 
            foreach (Steema.TeeChart.Styles.Series s in tChart1.Series)
            {
                
                if (s.Title.Length > 8)
                {
                    //Cut the string
                    string tmp1 = s.Title.Substring(0, 8);
                    s.Title = tmp1;
                }
}
The problem occurs in VCL. Here’s the bug number: http://bugs.teechart.net/show_bug.cgi?id=1116