339 lines
7.4 KiB
Go
339 lines
7.4 KiB
Go
package etk
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import (
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"image"
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"image/color"
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"code.rocket9labs.com/tslocum/etk/messeji"
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"github.com/hajimehoshi/ebiten/v2"
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"golang.org/x/image/font"
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"golang.org/x/image/font/sfnt"
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)
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// Text is a text display widget.
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type Text struct {
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*Box
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field *messeji.TextField
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textFont *sfnt.Font
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textSize int
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textResize bool
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textAutoSize int
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scrollVisible bool
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children []Widget
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}
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// NewText returns a new Text widget.
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func NewText(text string) *Text {
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f := newText()
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f.SetText(text)
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f.SetForegroundColor(Style.TextColorLight)
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f.SetHandleKeyboard(true)
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t := &Text{
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Box: NewBox(),
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field: f,
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textFont: Style.TextFont,
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textSize: Scale(Style.TextSize),
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scrollVisible: true,
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}
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t.resizeFont()
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return t
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}
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// SetRect sets the position and size of the widget.
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func (t *Text) SetRect(r image.Rectangle) {
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t.Lock()
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defer t.Unlock()
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t.rect = r
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t.field.SetRect(r)
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t.resizeFont()
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}
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// Foreground return the color of the text within the field.
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func (t *Text) Foreground() color.RGBA {
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t.Lock()
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defer t.Unlock()
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return t.field.ForegroundColor()
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}
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// SetForegroundColor sets the color of the text within the field.
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func (t *Text) SetForeground(c color.RGBA) {
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t.Lock()
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defer t.Unlock()
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t.field.SetForegroundColor(c)
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}
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// Focus returns the focus state of the widget.
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func (t *Text) Focus() bool {
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return false
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}
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// SetFocus sets the focus state of the widget.
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func (t *Text) SetFocus(focus bool) bool {
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return false
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}
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// SetScrollBarWidth sets the width of the scroll bar.
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func (t *Text) SetScrollBarWidth(width int) {
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t.Lock()
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defer t.Unlock()
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t.field.SetScrollBarWidth(width)
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}
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// SetScrollBarColors sets the color of the scroll bar area and handle.
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func (t *Text) SetScrollBarColors(area color.RGBA, handle color.RGBA) {
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t.Lock()
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defer t.Unlock()
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t.field.SetScrollBarColors(Style.ScrollAreaColor, Style.ScrollHandleColor)
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}
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// SetScrollBorderColor sets the color of the top, right, bottom and left border
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// of the scroll bar handle.
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func (t *Text) SetScrollBorderColors(top color.RGBA, right color.RGBA, bottom color.RGBA, left color.RGBA) {
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t.Lock()
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defer t.Unlock()
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t.field.SetScrollBorderColors(top, right, bottom, left)
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}
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// SetWordWrap sets a flag which, when enabled, causes text to wrap without breaking words.
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func (t *Text) SetWordWrap(wrap bool) {
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t.Lock()
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defer t.Unlock()
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t.field.SetWordWrap(wrap)
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}
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// SetHorizontal sets the horizontal alignment of the text within the field.
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func (t *Text) SetHorizontal(h Alignment) {
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t.Lock()
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defer t.Unlock()
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t.field.SetHorizontal(messeji.Alignment(h))
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}
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// SetVertical sets the vertical alignment of the text within the field.
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func (t *Text) SetVertical(v Alignment) {
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t.Lock()
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defer t.Unlock()
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t.field.SetVertical(messeji.Alignment(v))
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}
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// Cursor returns the cursor shape shown when a mouse cursor hovers over the
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// widget, or -1 to let widgets beneath determine the cursor shape.
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func (t *Text) Cursor() ebiten.CursorShapeType {
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return ebiten.CursorShapeDefault
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}
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// Write writes to the text buffer.
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func (t *Text) Write(p []byte) (n int, err error) {
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t.Lock()
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defer t.Unlock()
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n, err = t.field.Write(p)
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if err != nil {
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return n, err
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}
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t.resizeFont()
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return n, err
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}
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// Text returns the content of the text buffer.
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func (t *Text) Text() string {
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t.Lock()
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defer t.Unlock()
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return t.field.Text()
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}
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// SetText sets the text in the field.
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func (t *Text) SetText(text string) {
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t.Lock()
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defer t.Unlock()
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t.field.SetText(text)
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t.resizeFont()
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}
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// SetLast sets the text of the last line of the field.
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func (t *Text) SetLast(text string) {
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t.Lock()
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defer t.Unlock()
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t.field.SetLast(text)
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t.resizeFont()
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}
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func (t *Text) resizeFont() {
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if !t.textResize {
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if t.textAutoSize == t.textSize {
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return
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}
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t.textAutoSize = t.textSize
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ff := FontFace(t.textFont, t.textSize)
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t.field.SetFont(ff, fontMutex)
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return
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}
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w, h := t.rect.Dx()-t.field.Padding()*2, t.rect.Dy()-t.field.Padding()*2
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if w == 0 || h == 0 {
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if t.textAutoSize == t.textSize {
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return
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}
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t.textAutoSize = t.textSize
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ff := FontFace(t.textFont, t.textSize)
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t.field.SetFont(ff, fontMutex)
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return
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}
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var autoSize int
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var ff font.Face
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for autoSize = t.textSize; autoSize > 0; autoSize-- {
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ff = FontFace(t.textFont, autoSize)
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bounds := BoundString(ff, t.field.Text())
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if bounds.Dx() <= w && bounds.Dy() <= h {
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break
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}
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}
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if t.textAutoSize == autoSize {
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return
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}
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t.field.SetFont(ff, fontMutex)
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t.textAutoSize = autoSize
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}
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func (t *Text) scrollBarVisible() bool {
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if t.textResize {
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return false
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}
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return t.scrollVisible
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}
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// SetScrollBarVisible sets whether the scroll bar is visible on the screen.
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func (t *Text) SetScrollBarVisible(scrollVisible bool) {
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t.Lock()
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defer t.Unlock()
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t.scrollVisible = scrollVisible
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t.field.SetScrollBarVisible(t.scrollBarVisible())
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}
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// SetAutoHideScrollBar sets whether the scroll bar is automatically hidden
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// when the entire text buffer is visible.
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func (t *Text) SetAutoHideScrollBar(autoHide bool) {
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t.Lock()
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defer t.Unlock()
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t.field.SetAutoHideScrollBar(autoHide)
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}
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// FontSize returns the font size of the field.
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func (t *Text) FontSize() int {
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t.Lock()
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defer t.Unlock()
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return t.textAutoSize
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}
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// SetFont sets the font and text size of the field. Scaling is not applied.
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func (t *Text) SetFont(fnt *sfnt.Font, size int) {
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t.Lock()
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defer t.Unlock()
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t.textFont, t.textSize = fnt, size
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t.resizeFont()
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}
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// SetAutoResize sets whether the font is automatically scaled down when it is
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// too large to fit the entire text buffer on one line.
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func (t *Text) SetAutoResize(resize bool) {
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t.Lock()
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defer t.Unlock()
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t.textResize = resize
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t.resizeFont()
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t.field.SetScrollBarVisible(t.scrollBarVisible())
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}
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// Padding returns the amount of padding around the text within the field.
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func (t *Text) Padding() int {
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t.Lock()
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defer t.Unlock()
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return t.field.Padding()
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}
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// SetPadding sets the amount of padding around the text within the field.
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func (t *Text) SetPadding(padding int) {
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t.Lock()
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defer t.Unlock()
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t.field.SetPadding(padding)
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}
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// SetFollow sets whether the field should automatically scroll to the end when
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// content is added to the buffer.
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func (t *Text) SetFollow(follow bool) {
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t.Lock()
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defer t.Unlock()
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t.field.SetFollow(follow)
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}
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// SetSingleLine sets whether the field displays all text on a single line.
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// When enabled, the field scrolls horizontally. Otherwise, it scrolls vertically.
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func (t *Text) SetSingleLine(single bool) {
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t.Lock()
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defer t.Unlock()
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t.field.SetSingleLine(single)
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}
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// SetMask sets the rune used to mask the text buffer contents. Set to 0 to disable.
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func (t *Text) SetMask(r rune) {
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t.Lock()
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defer t.Unlock()
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t.field.SetMask(r)
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}
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// HandleKeyboard is called when a keyboard event occurs.
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func (t *Text) HandleKeyboard(key ebiten.Key, r rune) (handled bool, err error) {
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return t.field.HandleKeyboardEvent(key, r)
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}
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// HandleMouse is called when a mouse event occurs.
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func (t *Text) HandleMouse(cursor image.Point, pressed bool, clicked bool) (handled bool, err error) {
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return t.field.HandleMouseEvent(cursor, pressed, clicked)
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}
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// Draw draws the widget on the screen.
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func (t *Text) Draw(screen *ebiten.Image) error {
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t.field.Draw(screen)
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return nil
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}
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// Children returns the children of the widget.
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func (t *Text) Children() []Widget {
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t.Lock()
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defer t.Unlock()
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return t.children
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}
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// AddChild adds a child to the widget.
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func (t *Text) AddChild(w ...Widget) {
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t.Lock()
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defer t.Unlock()
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t.children = append(t.children, w...)
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}
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var _ Widget = &Text{}
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