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kotlin_ui_dsl_version_2.md: move V1/2 section to bottom

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topics/user_interface_components/kotlin_ui_dsl_version_2.md
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@ -13,27 +13,6 @@ It supports many core Swing components and custom components widely used in JetB
The library is written in [Kotlin](kotlin.md) and makes it easy to develop user interfaces like dialogs and settings by using declarative syntax. The library is written in [Kotlin](kotlin.md) and makes it easy to develop user interfaces like dialogs and settings by using declarative syntax.
## Version 1 and 2 Comparison
In UI DSL version 2, some crucial problems from version 1 have been fixed, so porting is highly desirable.
See [](#migration-from-version-1) on how to port existing UI DSL code from version 1 to version 2 API.
Version 1 is deprecated and will be removed in future platform releases.
The following significant changes were made:
- Reduced API, which allows conceiving API easier and faster.
Example: there were 5 overloaded methods `Cell.checkBox()` in version 1, now only one method remains.
Functionality for binding properties is extracted into `Cell<T>.bindSelected()` methods.
- UI DSL became stricter, so the available API in every context is much smaller.
Example: code like `row { row {` is forbidden now.
- Structured API mostly based on interfaces, because it's easier to learn API by grouped methods.
Only a small part of API is implemented as extensions.
- KDoc is widely used.
- MIG layout is fully removed from the new UI DSL and replaced by `GridLayout`.
Because MIG layout is an external library, it's hard to fix bugs there (e.g., there are layout problems when components become invisible) and extend its functionality.
Fixed focus ring cropping problems: when components are placed near the panel border focus ring could be cropped if panel insets do not specify enough space.
- Implemented [Placeholder](#placeholder) that allows replacing components at runtime after content is shown.
## UI DSL Examples ## UI DSL Examples
It is highly recommended taking a look at the UI DSL demo available via <menupath>Tools | Internal Actions | UI | UI DSL Showcase</menupath> (see [Internal Actions](internal_actions_intro.md) if not available in your IDE instance). It is highly recommended taking a look at the UI DSL demo available via <menupath>Tools | Internal Actions | UI | UI DSL Showcase</menupath> (see [Internal Actions](internal_actions_intro.md) if not available in your IDE instance).
@ -446,7 +425,28 @@ buttonsGroup(title = "radioButton:") {
}.bind(model::radioButtonColor) }.bind(model::radioButtonColor)
``` ```
## Migration from Version 1 ## Version 1 and 2 Comparison
In UI DSL version 2, some crucial problems from version 1 have been fixed, so porting is highly desirable.
See [](#migration-from-version-1) on how to port existing UI DSL code from version 1 to version 2 API.
Version 1 is deprecated and will be removed in future platform releases.
The following significant changes were made:
- Reduced API, which allows conceiving API easier and faster.
Example: there were 5 overloaded methods `Cell.checkBox()` in version 1, now only one method remains.
Functionality for binding properties is extracted into `Cell<T>.bindSelected()` methods.
- UI DSL became stricter, so the available API in every context is much smaller.
Example: code like `row { row {` is forbidden now.
- Structured API mostly based on interfaces, because it's easier to learn API by grouped methods.
Only a small part of API is implemented as extensions.
- KDoc is widely used.
- MIG layout is fully removed from the new UI DSL and replaced by `GridLayout`.
Because MIG layout is an external library, it's hard to fix bugs there (e.g., there are layout problems when components become invisible) and extend its functionality.
Fixed focus ring cropping problems: when components are placed near the panel border focus ring could be cropped if panel insets do not specify enough space.
- Implemented [Placeholder](#placeholder) that allows replacing components at runtime after content is shown.
### Migration from Version 1
New API is very similar to the old one and covers almost all functionality now, so moving to the new version can be done quickly. New API is very similar to the old one and covers almost all functionality now, so moving to the new version can be done quickly.