prompt

package
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 Go to latest Published: Feb 26, 2020 License: BSD-3-Clause Imports: 18 Imported by: 0

Documentation

Overview

package prompt implements several prompt windows that can be used in any X window manager. They are rather crude as they are built using X without any GUI toolkits.

See the examples directory for how to use each of the prompts.

Index

Constants

View Source 
const (
	TabCompletePrefix = iota
	TabCompleteAny
	TabCompleteMultiple
)

Variables

View Source 
var DefaultCycleConfig = CycleConfig{
	Grab:       true,
	CancelKey:  "Escape",
	ConfirmKey: "Return",
}
View Source 
var DefaultCycleTheme = &CycleTheme{
	BorderSize:  10,
	BgColor:     render.NewImageColor(color.RGBA{0xff, 0xff, 0xff, 0xff}),
	BorderColor: render.NewImageColor(color.RGBA{0x0, 0x0, 0x0, 0xff}),
	Padding:     10,
	Font: xgraphics.MustFont(xgraphics.ParseFont(
		bytes.NewBuffer(misc.DataFile("DejaVuSans.ttf")))),
	FontSize:         20.0,
	FontColor:        render.NewImageColor(color.RGBA{0x0, 0x0, 0x0, 0xff}),
	IconSize:         100,
	IconBorderSize:   5,
	IconTransparency: 50,
}
View Source 
var DefaultInputConfig = InputConfig{
	CancelKey:    "Escape",
	BackspaceKey: "BackSpace",
	ConfirmKey:   "Return",
}
View Source 
var DefaultInputTheme = &InputTheme{
	BorderSize:  5,
	BgColor:     render.NewImageColor(color.RGBA{0xff, 0xff, 0xff, 0xff}),
	BorderColor: render.NewImageColor(color.RGBA{0x0, 0x0, 0x0, 0xff}),
	Padding:     10,

	Font: xgraphics.MustFont(xgraphics.ParseFont(
		bytes.NewBuffer(misc.DataFile("DejaVuSans.ttf")))),
	FontSize:   20.0,
	FontColor:  render.NewImageColor(color.RGBA{0x0, 0x0, 0x0, 0xff}),
	InputWidth: 500,
}
View Source 
var DefaultMessageConfig = MessageConfig{
	CancelKey:  "Escape",
	ConfirmKey: "Return",
}
View Source 
var DefaultMessageTheme = &MessageTheme{
	BorderSize:  5,
	BgColor:     render.NewImageColor(color.RGBA{0xff, 0xff, 0xff, 0xff}),
	BorderColor: render.NewImageColor(color.RGBA{0x0, 0x0, 0x0, 0xff}),
	Padding:     10,

	Font: xgraphics.MustFont(xgraphics.ParseFont(
		bytes.NewBuffer(misc.DataFile("DejaVuSans.ttf")))),
	FontSize:  20.0,
	FontColor: render.NewImageColor(color.RGBA{0x0, 0x0, 0x0, 0xff}),
}
View Source 
var DefaultSelectConfig = SelectConfig{
	CancelKey:    "Escape",
	BackspaceKey: "BackSpace",
	ConfirmKey:   "Return",
}
View Source 
var DefaultSelectTheme = &SelectTheme{
	BorderSize:  10,
	BgColor:     render.NewImageColor(color.RGBA{0xff, 0xff, 0xff, 0xff}),
	BorderColor: render.NewImageColor(color.RGBA{0x0, 0x0, 0x0, 0xff}),
	Padding:     20,

	Font: xgraphics.MustFont(xgraphics.ParseFont(
		bytes.NewBuffer(misc.DataFile("DejaVuSans.ttf")))),
	FontSize:  20.0,
	FontColor: render.NewImageColor(color.RGBA{0x0, 0x0, 0x0, 0xff}),

	ActiveBgColor:   render.NewImageColor(color.RGBA{0x0, 0x0, 0x0, 0xff}),
	ActiveFontColor: render.NewImageColor(color.RGBA{0xff, 0xff, 0xff, 0xff}),

	GroupBgColor: render.NewImageColor(color.RGBA{0xff, 0xff, 0xff, 0xff}),
	GroupFont: xgraphics.MustFont(xgraphics.ParseFont(
		bytes.NewBuffer(misc.DataFile("DejaVuSans.ttf")))),
	GroupFontSize:  25.0,
	GroupFontColor: render.NewImageColor(color.RGBA{0x33, 0x66, 0xff, 0xff}),
	GroupSpacing:   15,
}

Functions

This section is empty.

Types

type Cycle 

type Cycle struct {
	X *xgbutil.XUtil // exported for no reason
	// contains filtered or unexported fields
}

Cycle represents a single cycle prompt. A new cycle prompt can be created by: 

cycle := prompt.NewCycle(XUtilValue, cycleThemeValue, cycleConfigValue)

And it can be displayed using: 

shown := cycle.Show(geometry, "", cycleItemsSlice)

Where the cycle item slice is constructed from *CycleItem values that are created using the (*Cycle).AddItem method.

func NewCycle 

func NewCycle(X *xgbutil.XUtil, theme *CycleTheme, config CycleConfig) *Cycle

NewCycle creates a new prompt. As many prompts as you want can be created, and they could even technically be shown simultaneously so long as at most one of them is using a grab. (The grab will fail for the others and they will not be shown.)

CycleTheme and CycleConfig values can either use DefaultCycle{Theme,Config} values found in this package, or custom ones can be created using composite literals.

func (*Cycle) AddChoice 

func (cycle *Cycle) AddChoice(choice CycleChoice) *CycleItem

AddItem should be thought of as a *CycleItem constructor. Its main role is to adapt a CycleChoice value to a value that is suitable for the cycle prompt to paint onto its window. The resulting CycleItem value can be used to update the image/text.

The CycleItem value must be destroyed by calling (*CycleItem).Destroy when it is no longer used. (This frees the X window resources associated with the *CycleItem.)

func (*Cycle) Choose 

func (cycle *Cycle) Choose()

Choose "selects" the currently highlighted choice.

func (*Cycle) Destroy 

func (cycle *Cycle) Destroy()

func (*Cycle) GrabId 

func (cycle *Cycle) GrabId() xproto.Window

GrabId returns the window id that the grab is set on. This is useful if you need to attach any Key{Press,Release} handlers.

func (*Cycle) Hide 

func (cycle *Cycle) Hide()

Hide will hide the cycle prompt and reset any relevant state information. The keyboard grab will also be released if one was made.

func (*Cycle) Id 

func (cycle *Cycle) Id() xproto.Window

Id returns the window id of the top-level window of the cycle prompt. I'm not sure why you might need it.

func (*Cycle) Next 

func (cycle *Cycle) Next()

Next will highlight the next choice in the dialog.

func (*Cycle) Prev 

func (cycle *Cycle) Prev()

Prev will highlight the previous choice in the dialog.

func (*Cycle) Show 

func (cycle *Cycle) Show(workarea xrect.Rect,
	keyStr string, items []*CycleItem) bool

Show will map and show the slice of items provided.

'workarea' is the rectangle to position the prompt window in. (i.e., typically the rectangle of the monitor to place it on.)

'keyStr' is an optional parameter. If this prompt is shown in response to a keybinding, then keyStr should be the keybinding used. If there are modifiers used in the keyStr, the prompt will automatically close if all of the modifiers are released. (This is the "alt-tab" functionality.) Note that if you don't want this auto-closing feature, simply leave keyStr blank, even if the prompt is shown in response to a key binding.

Show returns false if the prompt cannot be shown for some reason.

type CycleChoice 

type CycleChoice interface {
	// CycleIsActive should return whether the particular choice is "active" or
	// not. This is called every time the cycle prompt is displayed. In the
	// typical "alt-tab" example, this returns false when the window is
	// iconified (minimized). When this is false, the an "inactive" image is
	// used instead. (Which is a image with transparency equal to the
	// IconTransparency CycleTheme option.)
	CycleIsActive() bool

	// CycleImage returns the image used for the choice. (Both the active and
	// inactive images are built from this value.)
	// Note that it is okay for this method to be slow. It is only called
	// when a CycleChoice is added to the cycle prompt or when
	// (*CycleItem).UpdateImage is called. (So no image operations take place
	// when the cycle prompt is actually shown.)
	CycleImage() *xgraphics.Image

	// CycleText returns the text representing this choice. It can be empty.
	CycleText() string

	// CycleSelected is a hook that is called when this choice is chosen in the
	// cycle prompt.
	CycleSelected()

	// CycleHighlighted is a hook that is called when this choice is highlighted
	// in the cycle prompt.
	CycleHighlighted()
}

CycleChoice is any value capable of being shown in a prompt cycle.

type CycleConfig 

type CycleConfig struct {
	Grab       bool
	CancelKey  string
	ConfirmKey string
}

CycleConfig values can be used to create prompts with different configurations. As of right now, the only configuration options supported is whether to issue a keyboard grab and the key to use to "cancel" the prompt. (If empty, no cancel key feature will be used automatically.) For a reasonable default configuration, use DefaultCycleConfig. It will set "Escape" as the cancel key and issue a grab.

type CycleItem 

type CycleItem struct {
	// contains filtered or unexported fields
}

CycleItem is a representation of a CycleChoice that is amenable to being displayed in a cycle prompt. A CycleItem value is created and returned to the caller whenever (*Cycle).AddItem is called.

CycleItem values are used as a parameter to Show to dictate which choices are displayed in a viewing of a prompt.

Also, the Image and Text corresponding to this item can be updated using UpdateImage and UpdateText.

Finally, when a CycleChoice (and by extension, a CycleItem) is no longer in use, (*CycleItem).Destroy should be called. (This will destroy all X windows associated with the CycleItem.) Forgetting to call Destroy will result in X resources (window identifiers) not being freed until your connection is closed.

func (*CycleItem) Destroy 

func (ci *CycleItem) Destroy()

Destroy destroys all windows associated with the CycleItem. This is necessary to free X resources and should be called whenever the CycleItem will no longer be used.

func (*CycleItem) UpdateImage 

func (ci *CycleItem) UpdateImage()

UpdateImage will repaint the active and inactive images by calling CycleChoice.CycleImage. This is not called when the cycle prompt is shown; rather the burden is on the user to make sure the prompt has the most up to date image.

func (*CycleItem) UpdateText 

func (ci *CycleItem) UpdateText()

UpdateText repaints the text to an image associated with a particular CycleChoice. The text is retrieved by calling CycleChoice.CycleText.

type CycleTheme 

type CycleTheme struct {
	BorderSize  int
	BgColor     render.Color
	BorderColor render.Color
	Padding     int

	Font      *truetype.Font
	FontSize  float64
	FontColor render.Color

	IconSize         int
	IconBorderSize   int
	IconTransparency int
}

CycleTheme values can be used to create prompts with different colors, padding, border sizes, icon sizes, fonts, etc. You may use DefaultCycleTheme for a reasonable default theme if you don't care about the particulars.

type Input 

type Input struct {
	X *xgbutil.XUtil
	// contains filtered or unexported fields
}

func NewInput 

func NewInput(X *xgbutil.XUtil, theme *InputTheme, config InputConfig) *Input

func (*Input) Destroy 

func (inp *Input) Destroy()

func (*Input) Hide 

func (inp *Input) Hide()

func (*Input) Id 

func (inp *Input) Id() xproto.Window

func (*Input) Show 

func (inp *Input) Show(workarea xrect.Rect, label string,
	do func(inp *Input, text string), canceled func(inp *Input)) bool

func (*Input) Showing 

func (inp *Input) Showing() bool

type InputConfig 

type InputConfig struct {
	CancelKey    string
	BackspaceKey string
	ConfirmKey   string
}

type InputTheme 

type InputTheme struct {
	BorderSize  int
	BgColor     render.Color
	BorderColor render.Color
	Padding     int

	Font      *truetype.Font
	FontSize  float64
	FontColor render.Color

	InputWidth int
}

type Message 

type Message struct {
	X *xgbutil.XUtil
	// contains filtered or unexported fields
}

func NewMessage 

func NewMessage(X *xgbutil.XUtil,
	theme *MessageTheme, config MessageConfig) *Message

func (*Message) Destroy 

func (msg *Message) Destroy()

func (*Message) Hide 

func (msg *Message) Hide()

func (*Message) Id 

func (msg *Message) Id() xproto.Window

func (*Message) Show 

func (msg *Message) Show(workarea xrect.Rect, message string,
	duration time.Duration, hidden func(msg *Message)) bool

func (*Message) Showing 

func (msg *Message) Showing() bool

type MessageConfig 

type MessageConfig struct {
	CancelKey  string
	ConfirmKey string
}

type MessageTheme 

type MessageTheme struct {
	BorderSize  int
	BgColor     render.Color
	BorderColor render.Color
	Padding     int

	Font      *truetype.Font
	FontSize  float64
	FontColor render.Color
}

type Select 

type Select struct {
	X *xgbutil.XUtil
	// contains filtered or unexported fields
}

func NewSelect 

func NewSelect(X *xgbutil.XUtil,
	theme *SelectTheme, config SelectConfig) *Select

func (*Select) AddChoice 

func (slct *Select) AddChoice(choice SelectChoice) *SelectItem

func (*Select) AddGroup 

func (slct *Select) AddGroup(group SelectGroup) *SelectGroupItem

func (*Select) Destroy 

func (slct *Select) Destroy()

func (*Select) FilterItems 

func (slct *Select) FilterItems(search string)

func (*Select) Hide 

func (slct *Select) Hide()

func (*Select) Id 

func (slct *Select) Id() xproto.Window

func (*Select) NewStaticGroup 

func (slct *Select) NewStaticGroup(label string) SelectGroup

NewStaticGroup returns a value implementing the SelectGroup interface with the label provided. This is useful for generating group labels that never change. (i.e., in Wingo, these would be the no-label, Visible and Hidden groups. While the groups defined by workspace have to implement the SelectGroup interface themselves.)

func (*Select) Show 

func (slct *Select) Show(workarea xrect.Rect, tabCompleteType int,
	groups []*SelectShowGroup, data interface{}) bool

func (*Select) Showing 

func (slct *Select) Showing() bool

type SelectChoice 

type SelectChoice interface {
	SelectText() string
	SelectSelected(data interface{})
	SelectHighlighted(data interface{})
}

type SelectConfig 

type SelectConfig struct {
	CancelKey    string
	BackspaceKey string
	ConfirmKey   string
	TabKey       string
}

type SelectGroup 

type SelectGroup interface {
	SelectGroupText() string
}

type SelectGroupItem 

type SelectGroupItem struct {
	// contains filtered or unexported fields
}

func (*SelectGroupItem) Destroy 

func (si *SelectGroupItem) Destroy()

func (*SelectGroupItem) ShowGroup 

func (si *SelectGroupItem) ShowGroup(items []*SelectItem) *SelectShowGroup

func (*SelectGroupItem) UpdateText 

func (si *SelectGroupItem) UpdateText()

type SelectItem 

type SelectItem struct {
	// contains filtered or unexported fields
}

func (*SelectItem) Destroy 

func (si *SelectItem) Destroy()

func (*SelectItem) UpdateText 

func (si *SelectItem) UpdateText()

type SelectShowGroup 

type SelectShowGroup struct {
	*SelectGroupItem
	// contains filtered or unexported fields
}

type SelectTheme 

type SelectTheme struct {
	BorderSize  int
	BgColor     render.Color
	BorderColor render.Color
	Padding     int

	Font      *truetype.Font
	FontSize  float64
	FontColor render.Color

	ActiveBgColor   render.Color
	ActiveFontColor render.Color

	GroupBgColor   render.Color
	GroupFont      *truetype.Font
	GroupFontSize  float64
	GroupFontColor render.Color
	GroupSpacing   int
}

Source Files

View all Source files

Directories

Path Synopsis
examples
cycle
Example cycle shows how to use the cycle prompt.
 Example cycle shows how to use the cycle prompt.
input
Example input shows how to use an Input prompt from the prompt pacakge.
 Example input shows how to use an Input prompt from the prompt pacakge.
message
Example message shows how to use a Message prompt from the prompt pacakge.
 Example message shows how to use a Message prompt from the prompt pacakge.
select
Example select shows how to use a Select prompt from the prompt pacakge.
 Example select shows how to use a Select prompt from the prompt pacakge.

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