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50 lines
2.4 KiB
Markdown
50 lines
2.4 KiB
Markdown
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---
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template: component
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category: Design Fundamental
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order: 4
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cols: 1
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title: Layout
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---
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Layout and Navigation is the backbone of productions, it is one of the most important design pattern of a page,
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and it is also a base when you create a page, it will establish a interactive and visual style for a production.
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The Layout and Navigation design specification for Ant Design are as follows:
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### The specification of size
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The first level of the navigation is placed near by a logo inclined left, and the secondary menu is placed inclined right.
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- Top Navigation (almost systems): the height of the first level navigation `64px`, the second level of navigation `48px`。
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- Top Navigation(contents page): the height of the first level navigation `80px`,the second level of navigation `56px`。
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- Calculation formula of a top navigation:`48+8n`.
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- Calculation formula a aside navigation:`200+8n`.
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### The principle of interaction
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- The first level navigation and the last level navigation should be distincted by visualization;
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- The current item should have the highest priority of visualization;
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- When the current navigation item is collapsed, the stlye of the current navigation item will be applied to the parent level of it;
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- The left side navigation bar support for both the according and the expanding style, you can choose the one of it case by case.
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### The principle of visualization
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Style of a navigation should conform to the level of it.
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- **Emphasis by colorblock**
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When background color is a deep color, you can use this pattern for the parent level navigation item of current page.
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- **The highlight match stick**
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When background color is a light color, you can use this pattern for the current page navigation item, we recommed to use it for the last item of the navigation path.
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- **Hightlighted font**
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From the visualization aspect, hightlighted font is stronger than colorblock, this pattern is often used for the parent level of the current item.
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- **Enlarge the size of the font**
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`12px`、`14px` is a standard font size of navigations，14 is used for the first and the second level of the navigation. You can choose a approprigate font size in terms of the level of your navigation.
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In almost middle-back systems, Ant Design uses two general layouts of top navigation and aside navition, we collect some basic layouts of middle-back systems are designed by Ant Design as follows:
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