Difference between revisions of "LCL AutoSizing"
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The main method is TWinControl.AlignControls. | The main method is TWinControl.AlignControls. | ||
| − | #AdjustClient | + | #init RemainingClientRect to ClientRect and RemainingBorderSpace to Rect(0,0,0,0) |
| − | #alTop,alBottom,alLeft,alRight,alClient,alCustom,alNone | + | #call AdjustClient to adjust RemainingClientRect |
| − | ## | + | #apply ChildSizing.LeftRightSpacing,ChildSizing.TopBottomSpacing |
| + | #call DoAlign with alTop,alBottom,alLeft,alRight,alClient,alCustom,alNone | ||
| + | ##DoAlign collects child controls with this Align value and call for each such control DoPosition | ||
| + | ###DoPosition calculates the new Left,Top,Width,Height | ||
Revision as of 21:23, 5 September 2007
Overview / Terminology
This page explains the LCL auto sizing algorithm. AutoSizing means here: Automatic resizing and repositioning of LCL controls.
Properties
The following properties defines the behavior of the LCL autosizing:
- Current Left,Top,Width,Height,ClientWidth,ClientHeight
- Loaded Left,Top,Width,Height,ClientWidth,ClientHeight
- AutoSize
- Anchors
- AnchorSides
- Align
- BorderSpacing
- ChildSizing
- Constraints
For Delphi compatibility the LCL supports the method AdjustClientRect which is an extension to the BorderSpacing properties.
Order
The main method is TWinControl.AlignControls.
- init RemainingClientRect to ClientRect and RemainingBorderSpace to Rect(0,0,0,0)
- call AdjustClient to adjust RemainingClientRect
- apply ChildSizing.LeftRightSpacing,ChildSizing.TopBottomSpacing
- call DoAlign with alTop,alBottom,alLeft,alRight,alClient,alCustom,alNone
- DoAlign collects child controls with this Align value and call for each such control DoPosition
- DoPosition calculates the new Left,Top,Width,Height
- DoAlign collects child controls with this Align value and call for each such control DoPosition
