Method recalc

gui/button.go:208–263

recalc recalculates all dimensions and position from inside out

()

// recalc recalculates all dimensions and position from inside out
func (b *Button) recalc() {

	// Current width and height of button content area
	width := b.Panel.ContentWidth()
	height := b.Panel.ContentHeight()

	// Image or icon width
	imgWidth := float32(0)
	spacing := float32(4)
	if b.image != nil {
		imgWidth = b.image.Width()
	} else if b.icon != nil {
		imgWidth = b.icon.Width()
	}
	if imgWidth == 0 {
		spacing = 0
	}

	// If the label is empty and an icon of image was defined ignore the label widthh
	// to centralize the icon/image in the button
	labelWidth := spacing + b.Label.Width()
	if b.Label.Text() == "" && imgWidth > 0 {
		labelWidth = 0
	}

	// Sets new content width and height if necessary
	minWidth := imgWidth + labelWidth
	minHeight := b.Label.Height()
	resize := false
	if width < minWidth {
		width = minWidth
		resize = true
	}
	if height < minHeight {
		height = minHeight
		resize = true
	}
	if resize {
		b.SetContentSize(width, height)
	}

	// Centralize horizontally
	px := (width - minWidth) / 2

	// Set label position
	ly := (height - b.Label.Height()) / 2
	b.Label.SetPosition(px+imgWidth+spacing, ly)

	// Image/icon position
	if b.image != nil {
		iy := (height - b.image.height) / 2
		b.image.SetPosition(px, iy)
	} else if b.icon != nil {
		b.icon.SetPosition(px, ly)
	}
}