Image & Diagram Components

User Guide → Image & Diagram Components

Images & Diagrams

The image components here provide convenient syntax & styling abstractions on top of raw HTML and Markdown images. Diagrams, in the form of inline PlantUML components are also supported.

Pictures

A pic component allows you to add captions below the image.

CODE:

<pic src="https://markbind.org/images/logo-lightbackground.png" width="300" alt="Logo">
  MarkBind Logo
</pic>

OUTPUT:

Logo MarkBind Logo

Options

Name Type Default Description
alt string This must be specified.
The alternative text of the image.
height string The height of the image in pixels.
src string This must be specified.
The URL of the image.
The URL can be specified as absolute or relative references. More info in: Intra-Site Links
width string The width of the image in pixels.
If both width and height are specified, width takes priority over height. It is to maintain the image's aspect ratio.
<pic src="https://markbind.org/images/logo-lightbackground.png" width="300" alt="Logo">
  MarkBind Logo
</pic>
Logo MarkBind Logo

Annotations

An annotate component allows you to easily annotate over any images.

Annotate wrappers (<annotate>) are used in conjunction with Annotate Points (<a-point>).

  • <annotate>: Annotate wrappers are used to hold the image and set its width and height.
  • <a-point>: Annotate points define the position, text and style of each point within the image. Insert them between the Annotate wrappers.

The x and y coordinates of each Annotate Point are relative to the image and are written in percentage of total width or height.

CODE:

<annotate src="../../images/annotateSampleImage.png" width="500" alt="Sample Image">
  <!-- Minimal Point -->
  <a-point x="25%" y="25%" content="This point is 25% from the left and 25% from the top" />
  <!-- Customize Point Size (default size is 40px) -->
  <a-point x="50%" y="25%" content="This point is 50% from the left and 25% from the top"  size="60"/>
  <!-- Customize Point Header (default is empty) -->
  <a-point x="75%" y="25%" content="This point is 75% from the left and 25% from the top"  header="This has a header"/>
  <!-- Customize Point Color (default color is green) -->
  <a-point x="25%" y="50%" content="This point is 25% from the left and 50% from the top"  color="red"/>
  <!-- Customize Point Opacity (default opacity is 0.3) -->
  <a-point x="50%" y="50%" content="This point is 50% from the left and 50% from the top"  opacity="0.7"/>
  <!-- Customize Point Label (default is empty) -->
  <a-point x="25%" y="75%" content="This point is 25% from the left and 75% from the top" label="1"/>
  <!-- Customize Text Color (default color is black) -->
  <a-point x="50%" y="75%" content="This point is 50% from the left and 75% from the top"  textColor="white" color="black" label="2" opacity="1"/>
  <!-- Customize Font Size (default font size is 14) -->
  <a-point x="75%" y="75%" content="This point is 75% from the left and 75% from the top"  fontSize="30" label="3"/>
  <!-- Customize Label (default is a rounded button) -->
  <a-point x="75%" y="50%" content="This point is 75% from the left and 50% from the top">
    <span class="badge bg-primary">Badge label</span>
  </a-point>
</annotate>

OUTPUT:

Sample Image

Use markdown in the header, label and content

Annotate Points supports markdown in the header, label and content.

CODE:

<annotate src="../../images/annotateSampleImage.png" width="500" alt="Sample Image">
  <a-point x="25%" y="25%" content="# Content" />
  <a-point x="50%" y="25%" header=":blush:" />
  <a-point x="75%" y="25%" label=":heart:"/>
</annotate>

OUTPUT:

Sample Image

Customising shapes for Annotate Point

Annotate Points supports different shapes and customisation.

The default shape used is a rounded button.

When using a customised shape, the options shape, color and opacity will not work.

Style the shape to achieve the same effect.

CODE:

<annotate src="../../images/annotateSampleImage.png" width="500" alt="Sample Image">
  <a-point x="75%" y="50%" content="This point is 75% from the left and 50% from the top">
    <span class="badge bg-primary">Badge label</span>
  </a-point>
  <a-point x="25%" y="50%" content="This point is 25% from the left and 50% from the top">
    <pic src="../../images/deer.jpg" width="50" height="50">
  </a-point>
  <!-- Customised Annotate Point with styling-->
  <a-point x="50%" y="50%" content="This point is 25% from the left and 50% from the top">
    <div style="opacity: 90%; color: red">Custom</div>
  </a-point>
</annotate>

OUTPUT:

Sample Image

Using triggers and positions for Annotate Point

Similar to popovers, Annotate Points also support different types of triggers and positions for users with different needs.

CODE:

<annotate src="../../images/annotateSampleImage.png" width="500" alt="Sample Image">
  <!-- Default Trigger (click)-->
  <a-point x="33%" y="33%" content="Lorem ipsum dolor sit amet" />
  <!-- Set Trigger to hover focus -->
  <a-point x="66%" y="33%" content="Lorem ipsum dolor sit amet" trigger="hover focus"/>
  <!-- Set Popover Placement (click)-->
  <a-point x="25%" y="66%" content="Popover on the left" placement="left"/>
  <a-point x="50%" y="66%" content="Popover on the bottom" placement="bottom"/>
  <a-point x="75%" y="66%" content="Popover on the right" placement="right"/>
  <!-- Both trigger and popover placement hover focus -->
  <a-point x="50%" y="66%" content="Popover on the bottom" placement="bottom" trigger="hover focus"/>
</annotate>

OUTPUT:

Sample Image

Displaying content as legends in Annotate Point

<a-point> allows users to display its content inside a popover or as a legend below the diagram or both. However, the label attribute must be specified in <a-point> in order to display the content below the image.

CODE:

<annotate src="../../images/annotateSampleImage.png" width="500" alt="Sample Image">
  <!-- Default Legend (popover only)-->
  <a-point x="25%" y="50%" content="There is only text when you click me" label="1"/>
  <!-- Set Legend to bottom only (no popover) -->
  <a-point x="50%" y="50%" content="Clicking on this does nothing" label="2" legend="bottom" header="Headers are displayed as well"/>
  <!-- Set Legend to both -->
  <a-point x="75%" y="50%" content="There is text at both locations"  label="3" legend="both" header="Headers are displayed at both positions"/>
</annotate>

OUTPUT:

Sample Image
:

Clicking on this does nothing

:

There is text at both locations


Sample use cases for Annotate

Here we showcase some use cases of the Annotate feature.

Example 1: Describing elements in an image

CODE:

<annotate src="../../images/annotateSampleObject.png" height="500" alt="Sample Image">
  <a-point x="6%" y="50%" content="You can use a triangle and a solid line (not to be confused with an arrow) to indicate class inheritance." label="1" header="Class inheritance" legend="both"/>
  <a-point x="25.5%" y="50%" content="UML uses a solid diamond symbol to denote composition." label="2" header="Composition" color="red"  legend="both"/>
  <a-point x="45%" y="50%" content="UML uses a hollow diamond to indicate an aggregation."  label="3" header="Aggregation" color="blue" legend="both"/>
  <a-point x="64.5%" y="50%" content="Association labels describe the meaning of the association."  label="4" header="Association labels" color="yellow"  legend="both"/>
</annotate>

OUTPUT:

Sample Image
:

You can use a triangle and a solid line (not to be confused with an arrow) to indicate class inheritance.

:

UML uses a solid diamond symbol to denote composition.

:

UML uses a hollow diamond to indicate an aggregation.

:

Association labels describe the meaning of the association.

Example 2: Drawing over elements

CODE:

<annotate src="../../images/annotateSampleSequence.png" height="500" alt="Sample Image">
  <a-point x="35%" y="18.5%" content="Operation is invoked" header="Operation"  opacity="0.2" size="30"/>
  <a-point x="65%" y="50%" content="This is the period during which the method is being executed" header="Activation Bar" opacity="0.3" size="50" color="yellow"/>
  <a-point x="14%" y="85%" content="Return control and possibly some return value" header="Return Value" opacity="0.2" size="30" color="blue"/>
</annotate>

OUTPUT:

Sample Image

<a-point> Options

Name Type Default Description
x String This must be specified.
The x-coordinate of the point.
Supports range of values from 0% to 100%.
y String This must be specified.
The y-coordinate of the point.
Supports range of values from 0% to 100%.
content String '' Annotate Point content.
The annotation content will be omitted if this is not provided.
header String '' Annotate Point header.
The header will be omitted if this is not provided.
trigger String click Popover trigger type.
Supports: click, focus, hover, or any space-separated combination of these.
placement String top Position of the Popover.
Supports: top, left, right, bottom.
label String '' The label shown on the point itself.
The label will be omitted if this is not provided.
Note that labels should not be too long as they might overflow out of the point.
size String '40' The size of the point in pixels.
Does not work with customised shapes
color String 'green' The color of the point.
Supports any color in the CSS color format. E.g. red, #ffffff, rgb(66, 135, 245), etc.
Does not work with customised shapes
opacity String '0.3' The opacity of the point.
Supports range of values from 0 to 1.
Does not work with customised shapes
fontSize String '14' The font size of the label.
Supports any pixel size smaller than size of the point.
textColor String 'black' The color of the label.
Supports any color in the CSS color format. E.g. red, #ffffff, rgb(66, 135, 245), etc.
legend String 'popover' The position of the Annotate Point content and header.
Supports: popover, bottom, both.

<annotate> Options

This is effectively the same as the options used for the picture component.

Name Type Default Description
alt string This must be specified.
The alternative text of the image.
src string This must be specified.
The URL of the image.
The URL can be specified as absolute or relative references. More info in: Intra-Site Links
height string '' The height of the image in pixels.
width string '' The width of the image in pixels.
If both width and height are specified, width takes priority over height. It is to maintain the image's aspect ratio.
<annotate src="../../images/annotateSampleImage.png" width="500" alt="Sample Image">
  <a-point x="25%" y="25%" content="Lorem ipsum dolor sit amet" />
  <a-point x="50%" y="25%" content="Lorem ipsum dolor sit amet" label="1a"/>
  <a-point x="50%" y="25%" content="Lorem ipsum dolor sit amet" label="1b" legend="both"/>
</annotate>
Sample Image

Thumbnails

A thumbnail component allows you to insert thumbnails using text, images, or icons.

CODE:

<thumbnail circle src="../../images/deer.jpg" size="100"/>
<thumbnail circle text=":book:" background="#dff5ff" size="100"/>
<thumbnail circle text="___CS___" background="#333" font-color="white" size="100"/>
<thumbnail circle text=":fas-book:" font-color="darkgreen" border="3px solid darkgreen" size="100"/>

<thumbnail src="../../images/deer.jpg" size="100"/>
<thumbnail text=":book:" background="#dff5ff" size="100"/>
<thumbnail text="___CS___" background="#333" font-color="white" size="100"/>
<thumbnail text=":fas-book:" font-color="darkgreen" border="3px solid darkgreen" size="100"/>

OUTPUT:

📖 CS 📖 CS

Options

Name Type Default Description
alt string This must be specified if src is specified
The alternative text of the image.
background string Specifies the background color.
Accepts any valid CSS background property
border string Specifies the border thickness, type, and color.
Accepts any valid CSS border property
circle boolean false If this option is enabled, the thumbnail will be circle shaped instead of square
font-color string The color of the text, affects normal text and icons (but not emojis)
font-size string Text size, defaults to half of size, affects text, icons and emojis
size string 100 The size of the thumbnail in pixels
src string The URL of the image.
The URL can be specified as absolute or relative references. More info in: Intra-Site Links
text string The text to use in the thumbnail, icons, emojis and markdown are supported here

If both text and src are specified, src will take higher priority.

<thumb circle src="https://markbind.org/images/logo-lightbackground.png" size="100"/>

Diagrams

You can use the PlantUML syntax to add diagrams.

The following additional dependencies are involved when using this feature (locally and in your )

  • Java 8 or higher (required - to run the PlantUML JAR executable)
  • Graphviz or higher (optional - you don't need this if you are on Windows, or only need sequence diagrams and activity (beta) diagrams)
    • A warning will be displayed if you are using a non-Windows platform and don't have Graphviz installed. To disable this warning, you may modify your site.json like this.
    • An alternative layout engine, Smetana, is integrated into PlantUML and can be used to generate diagrams without a Graphviz installation. However, as the Smetana engine is a work in progress, certain layouts may not render correctly.

CODE:

<puml width="300">
@startuml
alice -> bob ++ : hello
bob -> bob ++ : self call
bob -> bib ++  #005500 : hello
bob -> george ** : create
return done
return rc
bob -> george !! : delete
return success
@enduml
</puml>

OUTPUT:

Alternatively, a PlantUML diagram can be specified in a separate .puml file and inserted into a page using a <puml> tag.

CODE:

diagrams/sequence.puml:

@startuml
alice -> bob ++ : hello
bob -> bob ++ : self call
bob -> bib ++  #005500 : hello
bob -> george ** : create
return done
return rc
bob -> george !! : delete
return success
@enduml

in another file:

<puml src="diagrams/sequence.puml" width=300 />

OUTPUT:

The full PlantUML syntax reference can be found at plantuml.com/guide

More examples


Options

Name Type Description
alt string The alternative text of the diagram.
height string The height of the diagram in pixels.
name string The name of the output file.
Avoid using the same name for different diagrams to prevent overwriting.
src string The URL of the diagram if your diagram is in another .puml file.
The URL can be specified as absolute or relative references. More info in: Intra-Site Links
width string The width of the diagram in pixels.
If both width and height are specified, width takes priority over height. It is to maintain the diagram's aspect ratio.
<puml width=300>
@startuml
alice -> bob ++ : hello
bob -> bob ++ : self call
@enduml
</puml>

Sequence Diagram:

Use Case Diagram:

Class Diagram:

Activity Diagram:

Component Diagram:

State Diagram:

Object Diagram:

Gantt Diagram:

Entity Relation Diagram:

Ditaa Diagram:

Archimate Diagram:


Tree

A tree component allows you to generate tree-like visualisations, suitable for displaying folder structure.

Use indentation (2 spaces) to indicate the level of nesting.

CODE:

<tree>
C:/course/
  textbook/
    index.md
  index.md
  reading.md
  site.json
</tree>

OUTPUT:

C:/course/ ├── textbook/ │ └── index.md ├── index.md ├── reading.md └── site.json

Markdown unordered lists are also supported.

CODE:

<tree>
C:/course/
  - textbook/
  - index.md
C:/course/
  * textbook/
  * index.md
C:/course/
  + textbook/
  + index.md
</tree>

OUTPUT:

C:/course/ ├── textbook/ └── index.md C:/course/ ├── textbook/ └── index.md C:/course/ ├── textbook/ └── index.md

Besides file system structures, you can use this for any lightweight tree-like structure.

CODE:

<tree>
Enjoy MarkBind?
  You may want to:
    Like :heart:
    Share :speech_balloon:
    Contribute :pencil:
</tree>

OUTPUT:

Enjoy MarkBind? └── You may want to: ├── Like ❤️ ├── Share 💬 └── Contribute 📝

You can use Tree in combination with inline Markdown or inline HTML elements.

CODE:

<tree>
Formatting is supported!
  textbook/
    `index.md`
  **index.md**
    ~~index.md~~
    %%dimmed%%
    Super^script^
    ****Super Bold****
    !!Underline!!
    !!Underline with {text=danger}!!{.text-danger}
    <span class="text-danger">RED</span>
  __reading.md__
  ++site.json++
  ==hello==
  :construction:
  :fas-file-code:
  :)
</tree>

OUTPUT:

Formatting is supported! ├── textbook/ │ └── index.md ├── index.md │ ├── index.md │ ├── dimmed │ ├── Superscript │ ├── Super Bold │ ├── Underline │ ├── Underline with {text=danger} │ └── RED ├── reading.md ├── site.json ├── hello ├── 🚧 ├── └── 😃

Currently, Pop-Ups(tooltip/trigger) are not supported within a tree component.

You can refer to Formatting Contents to find more information about text styles and other supported inline syntax.

<tree>
C:/course/
  textbook/
    index.md
  index.md
  reading.md
  site.json
</tree>
C:/course/ ├── textbook/ │ └── index.md ├── index.md ├── reading.md └── site.json