PageToolsPlugin
Class: PageToolsPlugin
Page Tools Plugin. Adds the "Page tools" button.
Example
<script src="gcimageviewer.js"></script></head>
<script src="plugins/pageTools.js"></script>
<script>
const viewer = new DsImageViewer("#root");
viewer.addPlugin(new PageToolsPlugin());
</script>
Properties
viewer
viewer: ImageViewerAPI;
Gets the image viewer instance. The image viewer instance.
Implementation of
PageToolsPluginAPI.viewer
options
options: PageToolsPluginOptions;
Plugin options
Implementation of
PageToolsPluginAPI.options
totalRotation
totalRotation: number;
Gets current rotation in degrees.
Implementation of
PageToolsPluginAPI.totalRotation
paintLayer
paintLayer: ImageLayer;
Gets the paint layer containing the HTML canvas for drawing the image.
Implementation of
PageToolsPluginAPI.paintLayer
isReady
isReady: boolean;
Returns true if the image is loaded into the viewer and the image format is supported by the Image Filters plugin.
Implementation of
PageToolsPluginAPI.isReady
naturalSize
naturalSize: Size;
Natural image size.
Implementation of
PageToolsPluginAPI.naturalSize
id
id: PluginType;
Unique plug-in identifier.
Implementation of
PageToolsPluginAPI.id
Methods
rotate()
rotate(angle): Promise<boolean>;
Rotate image.
Parameters
angle
number
Angle to rotate an image.
Returns
Promise<boolean>
Implementation of
PageToolsPluginAPI.rotate
crop()
crop(
x,
y,
width,
height): Promise<boolean>;
Crop image.
Parameters
x
number
Leftmost point of a new image rectangle
y
number
Topmost point of a new image rectangle
width
number
Width a new image rectangle
height
number
Height a new image rectangle
Returns
Promise<boolean>
Whether transformation was applied successfully or not.
Implementation of
PageToolsPluginAPI.crop
resize()
resize(
width,
height,
keepAspectRatio): Promise<boolean>;
Resize image.
Parameters
width
number
New image width.
height
number
New image height
keepAspectRatio
boolean
Explicitly defines a need of keeping an original image aspect ratio. Defaults to true.
Returns
Promise<boolean>
Implementation of
PageToolsPluginAPI.resize
flip()
flip(horizontal, vertical): Promise<boolean>;
Flip image.
Parameters
horizontal
boolean
Flip horizontally. True by default.
vertical
boolean
Returns
Promise<boolean>
Whether transformation was applied successfully or not.
Implementation of
PageToolsPluginAPI.flip
flipHorizontal()
flipHorizontal(): Promise<boolean>;
Flip image horizontally.
Returns
Promise<boolean>
Whether transformation was applied successfully or not.
Implementation of
PageToolsPluginAPI.flipHorizontal
flipVertical()
flipVertical(): Promise<boolean>;
Flip image vertically.
Returns
Promise<boolean>
Whether transformation was applied successfully or not.
Implementation of
PageToolsPluginAPI.flipVertical
isImageFormatSupported()
isImageFormatSupported(imageFormat, allowUnknown?): boolean;
Determines whether the specified image format is supported for modifications.
Parameters
imageFormat
The image format to check, either as an enum value or string.
string | ImageFormatCode
allowUnknown?
boolean
If true, allows unknown formats (ImageFormatCode.Default) to be considered supported.
Returns
boolean
True if the format is supported for modifications, false otherwise.
Remarks
The following formats are explicitly not supported:
- TIFF (ImageFormatCode.TIFF)
- SVG (ImageFormatCode.SVG)
- ICO (ImageFormatCode.ICO)
- GIF (ImageFormatCode.GIF)
Examples
// Check if PNG is supported
const supported = isImageFormatSupported(ImageFormatCode.PNG);
// Check if an unknown format is supported (returns false by default)
const supported = isImageFormatSupported('custom-format');
// Check if an unknown format is supported (returns true when allowUnknown is true)
const supported = isImageFormatSupported('custom-format', true);
Implementation of
PageToolsPluginAPI.isImageFormatSupported
dispose()
dispose(): void;
Cleans up resources and disposes the plugin.
Returns
void
Implementation of
PageToolsPluginAPI.dispose
removePaintLayer()
removePaintLayer(): void;
Removes and disposes the active paint layer. If no paint layer exists, this method does nothing.
Returns
void
Implementation of
PageToolsPluginAPI.removePaintLayer
initialize()
initialize(viewer): void;
The method is called when the GcImageViewer component is initialized.
Parameters
viewer
Returns
void
Implementation of
PageToolsPluginAPI.initialize