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Change line feed sequence from CRLF to LF
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rd
parent
0425b8aabc
commit
fe2b9bfba6
300
radio.go
300
radio.go
@ -1,150 +1,150 @@
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package clui
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import (
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xs "github.com/huandu/xstrings"
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term "github.com/nsf/termbox-go"
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)
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/*
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Radio button control. Unite a few radios in one radio group to
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make a user select one of available choices.
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*/
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type Radio struct {
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BaseControl
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group *RadioGroup
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selected bool
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onChange func(bool)
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}
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/*
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NewRadio creates a new radio button.
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view - is a View that manages the control
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parent - is container that keeps the control. The same View can be a view and a parent at the same time.
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width - is minimal width of the control.
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title - radio title.
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scale - the way of scaling the control when the parent is resized. Use DoNotScale constant if the
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control should keep its original size.
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*/
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func CreateRadio(parent Control, width int, title string, scale int) *Radio {
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c := new(Radio)
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c.BaseControl = NewBaseControl()
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if width == AutoSize {
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width = xs.Len(title) + 4
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}
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c.parent = parent
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c.SetSize(width, 1) // TODO: only one line heigth is supported at that moment
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c.SetConstraints(width, 1)
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c.SetTitle(title)
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c.SetTabStop(true)
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c.SetScale(scale)
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c.onChange = nil
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if parent != nil {
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parent.AddChild(c)
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}
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return c
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}
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// Repaint draws the control on its View surface
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func (c *Radio) Draw() {
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if c.hidden {
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return
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}
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PushAttributes()
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defer PopAttributes()
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x, y := c.Pos()
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w, h := c.Size()
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fg, bg := RealColor(c.fg, c.Style(), ColorControlText), RealColor(c.bg, c.Style(), ColorControlBack)
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if !c.Enabled() {
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fg, bg = RealColor(c.fg, c.Style(), ColorControlDisabledText), RealColor(c.bg, c.Style(), ColorControlDisabledBack)
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} else if c.Active() {
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fg, bg = RealColor(c.fg, c.Style(), ColorControlActiveText), RealColor(c.bg, c.Style(), ColorControlActiveBack)
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}
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parts := []rune(SysObject(ObjRadio))
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cOpen, cClose, cEmpty, cCheck := parts[0], parts[1], parts[2], parts[3]
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cState := cEmpty
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if c.selected {
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cState = cCheck
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}
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SetTextColor(fg)
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SetBackColor(bg)
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FillRect(x, y, w, h, ' ')
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if w < 3 {
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return
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}
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PutChar(x, y, cOpen)
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PutChar(x+2, y, cClose)
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PutChar(x+1, y, cState)
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if w < 5 {
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return
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}
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shift, text := AlignColorizedText(c.title, w-4, c.align)
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DrawText(x+4+shift, y, text)
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}
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/*
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ProcessEvent processes all events come from the control parent. If a control
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processes an event it should return true. If the method returns false it means
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that the control do not want or cannot process the event and the caller sends
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the event to the control parent.
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The control processes only space button and mouse clicks to make control selected. Deselecting control is not possible: one has to click another radio of the radio group to deselect this button
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*/
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func (c *Radio) ProcessEvent(event Event) bool {
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if (!c.Active() && event.Type == EventKey) || !c.Enabled() {
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return false
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}
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if (event.Type == EventKey && event.Key == term.KeySpace) || event.Type == EventClick {
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if c.group == nil {
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c.SetSelected(true)
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} else {
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c.group.SelectItem(c)
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}
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return true
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}
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return false
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}
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// SetSelected makes the button selected. One should not use
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// the method directly, it is for RadioGroup control
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func (c *Radio) SetSelected(val bool) {
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c.selected = val
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if c.onChange != nil {
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go c.onChange(val)
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}
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}
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// Selected returns if the radio is selected
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func (c *Radio) Selected() bool {
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return c.selected
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}
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// SetGroup sets the radio group to which the radio belongs
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func (c *Radio) SetGroup(group *RadioGroup) {
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c.group = group
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}
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// OnChange sets the callback that is called whenever the state
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// of the Radio is changed. Argument of callback is the current
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func (c *Radio) OnChange(fn func(bool)) {
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c.mtx.Lock()
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defer c.mtx.Unlock()
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c.onChange = fn
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}
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package clui
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import (
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xs "github.com/huandu/xstrings"
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term "github.com/nsf/termbox-go"
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)
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/*
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Radio button control. Unite a few radios in one radio group to
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make a user select one of available choices.
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*/
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type Radio struct {
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BaseControl
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group *RadioGroup
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selected bool
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onChange func(bool)
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}
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/*
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NewRadio creates a new radio button.
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view - is a View that manages the control
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parent - is container that keeps the control. The same View can be a view and a parent at the same time.
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width - is minimal width of the control.
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title - radio title.
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scale - the way of scaling the control when the parent is resized. Use DoNotScale constant if the
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control should keep its original size.
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*/
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func CreateRadio(parent Control, width int, title string, scale int) *Radio {
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c := new(Radio)
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c.BaseControl = NewBaseControl()
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if width == AutoSize {
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width = xs.Len(title) + 4
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}
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c.parent = parent
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c.SetSize(width, 1) // TODO: only one line heigth is supported at that moment
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c.SetConstraints(width, 1)
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c.SetTitle(title)
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c.SetTabStop(true)
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c.SetScale(scale)
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c.onChange = nil
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if parent != nil {
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parent.AddChild(c)
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}
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return c
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}
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// Repaint draws the control on its View surface
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func (c *Radio) Draw() {
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if c.hidden {
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return
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}
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PushAttributes()
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defer PopAttributes()
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x, y := c.Pos()
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w, h := c.Size()
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fg, bg := RealColor(c.fg, c.Style(), ColorControlText), RealColor(c.bg, c.Style(), ColorControlBack)
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if !c.Enabled() {
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fg, bg = RealColor(c.fg, c.Style(), ColorControlDisabledText), RealColor(c.bg, c.Style(), ColorControlDisabledBack)
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} else if c.Active() {
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fg, bg = RealColor(c.fg, c.Style(), ColorControlActiveText), RealColor(c.bg, c.Style(), ColorControlActiveBack)
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}
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parts := []rune(SysObject(ObjRadio))
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cOpen, cClose, cEmpty, cCheck := parts[0], parts[1], parts[2], parts[3]
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cState := cEmpty
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if c.selected {
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cState = cCheck
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}
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SetTextColor(fg)
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SetBackColor(bg)
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FillRect(x, y, w, h, ' ')
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if w < 3 {
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return
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}
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PutChar(x, y, cOpen)
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PutChar(x+2, y, cClose)
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PutChar(x+1, y, cState)
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if w < 5 {
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return
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}
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shift, text := AlignColorizedText(c.title, w-4, c.align)
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DrawText(x+4+shift, y, text)
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}
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/*
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ProcessEvent processes all events come from the control parent. If a control
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processes an event it should return true. If the method returns false it means
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that the control do not want or cannot process the event and the caller sends
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the event to the control parent.
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The control processes only space button and mouse clicks to make control selected. Deselecting control is not possible: one has to click another radio of the radio group to deselect this button
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*/
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func (c *Radio) ProcessEvent(event Event) bool {
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if (!c.Active() && event.Type == EventKey) || !c.Enabled() {
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return false
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}
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if (event.Type == EventKey && event.Key == term.KeySpace) || event.Type == EventClick {
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if c.group == nil {
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c.SetSelected(true)
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} else {
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c.group.SelectItem(c)
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}
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return true
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}
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return false
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}
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// SetSelected makes the button selected. One should not use
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// the method directly, it is for RadioGroup control
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func (c *Radio) SetSelected(val bool) {
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c.selected = val
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if c.onChange != nil {
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go c.onChange(val)
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}
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}
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// Selected returns if the radio is selected
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func (c *Radio) Selected() bool {
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return c.selected
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}
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// SetGroup sets the radio group to which the radio belongs
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func (c *Radio) SetGroup(group *RadioGroup) {
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c.group = group
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}
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// OnChange sets the callback that is called whenever the state
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// of the Radio is changed. Argument of callback is the current
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func (c *Radio) OnChange(fn func(bool)) {
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c.mtx.Lock()
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defer c.mtx.Unlock()
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c.onChange = fn
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}
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