sync: from linuxdeepin/dtkdeclarative

[deepin-ci-robot]

Synchronize source files from linuxdeepin/dtkdeclarative.

Source-pull-request: linuxdeepin/dtkdeclarative#531

Summary by Sourcery

Sync QML example files from linuxdeepin/dtkdeclarative by replacing Rectangle root elements with Item and removing a redundant backgroundVisible property in the exhibition example

Enhancements:

• Replace Rectangle with Item as the root element in various QML examples
• Remove obsolete backgroundVisible property from the exhibition example delegate

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: deepin-ci-robot

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• debian/deepin/OWNERS

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[deepin-ci-robot]

deepin pr auto review

我对这个git diff进行了仔细审查，以下是改进意见：

1. 代码质量改进：

• 在main.qml中移除了backgroundVisible: false属性，这是一个好的改进，因为默认的ItemDelegate背景可以提供更好的视觉反馈，帮助用户理解当前选中状态。
• 将多个QML文件中的Rectangle替换为Item，这是一个很好的优化。因为Rectangle会默认绘制一个矩形背景，而Item更加轻量级，不需要绘制背景，提高了性能。

2. 语法逻辑改进：

• Example_settingsdialog.qml中移除了border.color: "blue"，这避免了不必要的边框绘制，保持界面简洁。
• 所有示例文件都统一使用了Item作为根元素，提高了代码的一致性。

3. 性能优化：

• 使用Item替代Rectangle减少了不必要的绘制操作，特别是在不需要背景色或边框的情况下，可以节省GPU资源。
• 移除了不必要的backgroundVisible属性，减少了属性计算的开销。

4. 代码安全：

• 代码中没有发现明显的安全问题。
• 使用Item作为基础类型更加安全，因为它不会引入Rectangle可能带来的绘制问题。

5. 其他建议：

• 考虑为Item添加适当的尺寸或布局约束，以确保内容正确显示。
• 可以考虑为这些示例添加注释，说明它们的使用场景或目的，提高代码的可维护性。

总体来说，这些更改都是积极的优化，提高了代码的性能和一致性。建议继续保持这种简洁高效的代码风格。

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Align example QML files with upstream changes by switching root elements from Rectangle to Item and removing an obsolete backgroundVisible setting in the exhibition example.

File-Level Changes

Change	Details	Files
Replace Rectangle with Item as root in QML examples	Changed root element type from Rectangle to Item	examples/qml-inspect/Example_settingsdialog.qml examples/qml-inspect/Example_1.qml examples/qml-inspect/Example_2.qml examples/qml-inspect/Example_colorselector.qml
Remove deprecated backgroundVisible property in exhibition example	Removed backgroundVisible property from ItemDelegate	examples/exhibition/main.qml

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