Support Board
Date/Time: Fri, 30 Jan 2026 05:04:08 +0000
Post From: Notice: Solution to: Chart/Chartbook Tabs Visibility Issues, Portions of Chart Window Cut Off
| [2025-12-22 01:04:17] |
| Sierra_Chart Engineering - Posts: 22572 |
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We want to explain the difference between Immediate chart drawing and Delayed chart drawing. However, before we explain these it is important to understand, that the primary thread of Sierra Chart, runs with a message loop. This loop gets and dispatches the messages received from the operating system. Messages can be mouse/pointer movement, keyboard input. Messages indicating commands selected from the menus. And other messages, the operating system provides to windows like if a window is resized. When a chart is updated, at the next update interval, the studies are calculated and there is an immediate drawing of the chart. Most actions, when interacting with the chart, cause an immediate drawing of the chart. But in some cases, there can be a delayed drawing of the chart. This is called an "Invalidate" command given to the operating system to invalidate the rectangle of the chart window. In this case it will be drawn after the current message from the message loop is processed. And the operating system will suppress drawing, if there is a significant amount of ongoing user interface input like from the mouse pointer. There can be cases where a delayed Chart Draw would be more better, because it reduces CPU usage. Although it is used in a limited amount of cases. There were some changes, in the versions with the new MDI functionality regarding using delayed updating, versus immediate, in cases where we thought immediate updating was not necessary and in order to reduce CPU usage, but we will change those cases back to immediate. Sierra Chart Support - Engineering Level Your definitive source for support. Other responses are from users. Try to keep your questions brief and to the point. Be aware of support policy: https://www.sierrachart.com/index.php?l=PostingInformation.php#GeneralInformation For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing Date Time Of Last Edit: 2025-12-22 01:20:13
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