40 lines
1.1 KiB
Go
40 lines
1.1 KiB
Go
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package layout
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import "fyne.io/fyne/v2"
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// Declare conformity with Layout interface
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var _ fyne.Layout = (*centerLayout)(nil)
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type centerLayout struct {
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}
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// NewCenterLayout creates a new CenterLayout instance
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func NewCenterLayout() fyne.Layout {
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return ¢erLayout{}
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}
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// Layout is called to pack all child objects into a specified size.
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// For CenterLayout this sets all children to their minimum size, centered within the space.
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func (c *centerLayout) Layout(objects []fyne.CanvasObject, size fyne.Size) {
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for _, child := range objects {
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childMin := child.MinSize()
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child.Resize(childMin)
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child.Move(fyne.NewPos(float32(size.Width-childMin.Width)/2, float32(size.Height-childMin.Height)/2))
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}
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}
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// MinSize finds the smallest size that satisfies all the child objects.
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// For CenterLayout this is determined simply as the MinSize of the largest child.
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func (c *centerLayout) MinSize(objects []fyne.CanvasObject) fyne.Size {
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minSize := fyne.NewSize(0, 0)
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for _, child := range objects {
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if !child.Visible() {
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continue
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}
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minSize = minSize.Max(child.MinSize())
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}
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return minSize
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}
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