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POCan I set to ScrollBar a floating Step?
 

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  1. POCan I set to ScrollBar a floating Step?
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    <p>I have a panel in witch I represent a timeline - 24 hours(<code>24 x 60 min = 1 440 min</code>). </p> <p>I need to set my scroll bar's step to a minute. It's evident that minimum size of such a panel should be <code>1440</code> pixels.</p> <p>Let's say the screen resolution on the client screen (width) is <code>1280</code>, so say panel container max size is 1280. Now, if I want my step be a minute I need to set the step to the scrollbar's container to <code>1280 / 1440 = 0.(8)</code> - but it's impossible, cause the Step (myContainer.HorizontalScroll.SmallChange) is an <code>int</code> value... </p> <p>Can I do something to this?</p> <p><strong>EDIT</strong></p> <p>Maybe 0.2 pixel per minute can be considered a inobservable error, but if my step will be 5 minutes, it will in reality be 4.(4)px but in scrollbar = 5, a step of 10 minutes will be = 8.(8)px : 10px. On a 800x600 screen the 10min step will be = 5.(5)px : 10px, so in each 2 clicks(20 min) I have 4 pixel error. This "delta" became visible.</p> <p>Finally, this is a sample, that <strong>DOES NOT work</strong> - even if I arrive to make the scrollbar visible - strange scrollbar visibility is unpredictable... - I can't scroll all the VOLVO logo in 6 (60Maxim/10smallChange) steps...:</p> <p><a href="http://lh6.ggpht.com/_1TPOP7DzY1E/S1eOPUlVvQI/AAAAAAAAC8M/ZFWDI_aaJxI/s800/panels.png" rel="nofollow noreferrer">alt text http://lh6.ggpht.com/_1TPOP7DzY1E/S1eOPUlVvQI/AAAAAAAAC8M/ZFWDI_aaJxI/s800/panels.png</a></p> <p>Designer:</p> <pre><code>this.panel2.BackgroundImage = ....Resources.volvo_logo; this.panel2.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Stretch; </code></pre> <p>Code:</p> <pre><code>public partial class Form1 : Form { private System.Windows.Forms.Button button1; private System.Windows.Forms.Panel panel1; private System.Windows.Forms.Panel panel2; public Form1() { InitializeComponent(); panel1.AutoScroll = false; panel1.HorizontalScroll.Maximum = 60; panel1.HorizontalScroll.SmallChange = 10; panel1.HorizontalScroll.LargeChange = 10; panel1.HorizontalScroll.Visible = true; panel1.Scroll += new ScrollEventHandler(panel1_Scroll); } void panel1_Scroll(object sender, ScrollEventArgs e) { Console.WriteLine( "Scroll: OldVal {0}, NewVal {1}, Orientation {2}, Type {3}", e.OldValue, e.NewValue, e.ScrollOrientation, e.Type); } } </code></pre>
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