mirror of
https://github.com/unidoc/unipdf.git
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95 lines
2.4 KiB
Go
95 lines
2.4 KiB
Go
/*
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* This file is subject to the terms and conditions defined in
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* file 'LICENSE.md', which is part of this source code package.
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*/
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package creator
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import (
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"github.com/unidoc/unipdf/v3/contentstream/draw"
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"github.com/unidoc/unipdf/v3/model"
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)
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// Ellipse defines an ellipse with a center at (xc,yc) and a specified width and height. The ellipse can have a colored
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// fill and/or border with a specified width.
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// Implements the Drawable interface and can be drawn on PDF using the Creator.
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type Ellipse struct {
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xc float64
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yc float64
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width float64
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height float64
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fillColor *model.PdfColorDeviceRGB
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borderColor *model.PdfColorDeviceRGB
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borderWidth float64
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}
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// newEllipse creates a new ellipse centered at (xc,yc) with a width and height specified.
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func newEllipse(xc, yc, width, height float64) *Ellipse {
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ell := &Ellipse{}
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ell.xc = xc
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ell.yc = yc
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ell.width = width
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ell.height = height
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ell.borderColor = model.NewPdfColorDeviceRGB(0, 0, 0)
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ell.borderWidth = 1.0
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return ell
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}
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// GetCoords returns the coordinates of the Ellipse's center (xc,yc).
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func (ell *Ellipse) GetCoords() (float64, float64) {
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return ell.xc, ell.yc
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}
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// SetBorderWidth sets the border width.
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func (ell *Ellipse) SetBorderWidth(bw float64) {
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ell.borderWidth = bw
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}
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// SetBorderColor sets the border color.
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func (ell *Ellipse) SetBorderColor(col Color) {
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ell.borderColor = model.NewPdfColorDeviceRGB(col.ToRGB())
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}
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// SetFillColor sets the fill color.
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func (ell *Ellipse) SetFillColor(col Color) {
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ell.fillColor = model.NewPdfColorDeviceRGB(col.ToRGB())
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}
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// GeneratePageBlocks draws the rectangle on a new block representing the page.
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func (ell *Ellipse) GeneratePageBlocks(ctx DrawContext) ([]*Block, DrawContext, error) {
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block := NewBlock(ctx.PageWidth, ctx.PageHeight)
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drawell := draw.Circle{
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X: ell.xc - ell.width/2,
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Y: ctx.PageHeight - ell.yc - ell.height/2,
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Width: ell.width,
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Height: ell.height,
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Opacity: 1.0,
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BorderWidth: ell.borderWidth,
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}
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if ell.fillColor != nil {
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drawell.FillEnabled = true
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drawell.FillColor = ell.fillColor
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}
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if ell.borderColor != nil {
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drawell.BorderEnabled = true
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drawell.BorderColor = ell.borderColor
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drawell.BorderWidth = ell.borderWidth
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}
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contents, _, err := drawell.Draw("")
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if err != nil {
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return nil, ctx, err
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}
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err = block.addContentsByString(string(contents))
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if err != nil {
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return nil, ctx, err
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}
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return []*Block{block}, ctx, nil
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}
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