Started interfacing everything

Building a scroll frame too.

termbox_asciiart.go

@@ -1,6 +1,8 @@
 package termboxUtil
 
 import (
+	"strings"
+
 	"github.com/nsf/termbox-go"
 )
 
@@ -21,18 +23,16 @@ func CreateASCIIArt(c []string, x, y int, fg, bg termbox.Attribute) *ASCIIArt {
 func (i *ASCIIArt) GetX() int { return i.x }
 
 // SetX set the x position of the modal to x
-func (i *ASCIIArt) SetX(x int) *ASCIIArt {
+func (i *ASCIIArt) SetX(x int) {
 	i.x = x
-	return i
 }
 
 // GetY Return the y position of the modal
 func (i *ASCIIArt) GetY() int { return i.y }
 
 // SetY Set the y position of the modal to y
-func (i *ASCIIArt) SetY(y int) *ASCIIArt {
+func (i *ASCIIArt) SetY(y int) {
 	i.y = y
-	return i
 }
 
 // GetHeight Returns the number of strings in the contents slice
@@ -40,10 +40,45 @@ func (i *ASCIIArt) GetHeight() int {
 	return len(i.contents)
 }
 
+// SetHeight truncates lines from the bottom of the ascii art
+func (i *ASCIIArt) SetHeight(h int) {
+	if len(i.contents) > h {
+		i.contents = i.contents[:h]
+	} else {
+		for j := len(i.contents); j < h; j++ {
+			i.contents = append(i.contents, "")
+		}
+	}
+}
+
+// GetWidth Returns the number of strings in the contents slice
+func (i *ASCIIArt) GetWidth() int {
+	// Find the longest line
+	var ret int
+	for j := range i.contents {
+		if len(i.contents[j]) > ret {
+			ret = len(i.contents[j])
+		}
+	}
+	return ret
+}
+
+// SetWidth Sets all lines in the contents to width w
+func (i *ASCIIArt) SetWidth(w int) {
+	// Find the longest line
+	for j := range i.contents {
+		mkUp := w - len(i.contents[j])
+		if mkUp > 0 {
+			i.contents[j] = i.contents[j] + strings.Repeat(" ", mkUp)
+		} else {
+			i.contents[j] = i.contents[j][:w]
+		}
+	}
+}
+
 // SetContents Sets the contents of i to c
-func (i *ASCIIArt) SetContents(c []string) *ASCIIArt {
+func (i *ASCIIArt) SetContents(c []string) {
 	i.contents = c
-	return i
 }
 
 // GetContents returns the ascii art
@@ -52,33 +87,30 @@ func (i *ASCIIArt) GetContents() []string {
 }
 
 // SetContentLine Sets a specific line of the contents to s
-func (i *ASCIIArt) SetContentLine(s string, idx int) *ASCIIArt {
+func (i *ASCIIArt) SetContentLine(s string, idx int) {
 	if idx >= 0 && idx < len(i.contents) {
 		i.contents[idx] = s
 	}
-	return i
 }
 
 // GetBackground Return the current background color of the modal
 func (i *ASCIIArt) GetBackground() termbox.Attribute { return i.bg }
 
 // SetBackground Set the current background color to bg
-func (i *ASCIIArt) SetBackground(bg termbox.Attribute) *ASCIIArt {
+func (i *ASCIIArt) SetBackground(bg termbox.Attribute) {
 	i.bg = bg
-	return i
 }
 
 // GetForeground Return the current foreground color
 func (i *ASCIIArt) GetForeground() termbox.Attribute { return i.fg }
 
 // SetForeground Set the foreground color to fg
-func (i *ASCIIArt) SetForeground(fg termbox.Attribute) *ASCIIArt {
+func (i *ASCIIArt) SetForeground(fg termbox.Attribute) {
 	i.fg = fg
-	return i
 }
 
 // Align Align the Ascii art over width width with alignment a
-func (i *ASCIIArt) Align(a TextAlignment, width int) *ASCIIArt {
+func (i *ASCIIArt) Align(a TextAlignment, width int) {
 	// First get the width of the longest string in the slice
 	var newContents []string
 	incomingLength := 0
@@ -91,7 +123,6 @@ func (i *ASCIIArt) Align(a TextAlignment, width int) *ASCIIArt {
 		newContents = append(newContents, AlignText(AlignText(line, incomingLength, AlignLeft), width, a))
 	}
 	i.contents = newContents
-	return i
 }
 
 // HandleKeyPress accepts the termbox event and returns whether it was consumed

termbox_confirmmodal.go

@@ -32,114 +32,101 @@ func CreateConfirmModal(title string, x, y, width, height int, fg, bg termbox.At
 func (i *ConfirmModal) GetTitle() string { return i.title }
 
 // SetTitle sets the current title of the modal to s
-func (i *ConfirmModal) SetTitle(s string) *ConfirmModal {
+func (i *ConfirmModal) SetTitle(s string) {
 	i.title = s
-	return i
 }
 
 // GetText returns the current text of the modal
 func (i *ConfirmModal) GetText() string { return i.text }
 
 // SetText sets the text of the modal to s
-func (i *ConfirmModal) SetText(s string) *ConfirmModal {
+func (i *ConfirmModal) SetText(s string) {
 	i.text = s
-	return i
 }
 
 // GetX returns the current x coordinate of the modal
 func (i *ConfirmModal) GetX() int { return i.x }
 
 // SetX sets the current x coordinate of the modal to x
-func (i *ConfirmModal) SetX(x int) *ConfirmModal {
+func (i *ConfirmModal) SetX(x int) {
 	i.x = x
-	return i
 }
 
 // GetY returns the current y coordinate of the modal
 func (i *ConfirmModal) GetY() int { return i.y }
 
 // SetY sets the current y coordinate of the modal to y
-func (i *ConfirmModal) SetY(y int) *ConfirmModal {
+func (i *ConfirmModal) SetY(y int) {
 	i.y = y
-	return i
 }
 
 // GetWidth returns the current width of the modal
 func (i *ConfirmModal) GetWidth() int { return i.width }
 
 // SetWidth sets the current modal width to width
-func (i *ConfirmModal) SetWidth(width int) *ConfirmModal {
+func (i *ConfirmModal) SetWidth(width int) {
 	i.width = width
-	return i
 }
 
 // GetHeight returns the current height of the modal
 func (i *ConfirmModal) GetHeight() int { return i.height }
 
 // SetHeight set the height of the modal to height
-func (i *ConfirmModal) SetHeight(height int) *ConfirmModal {
+func (i *ConfirmModal) SetHeight(height int) {
 	i.height = height
-	return i
 }
 
 // HelpIsShown returns true or false if the help is displayed
 func (i *ConfirmModal) HelpIsShown() bool { return i.showHelp }
 
 // ShowHelp sets whether or not to display the help text
-func (i *ConfirmModal) ShowHelp(b bool) *ConfirmModal {
+func (i *ConfirmModal) ShowHelp(b bool) {
 	i.showHelp = b
-	return i
 }
 
 // GetBackground returns the current background color
 func (i *ConfirmModal) GetBackground() termbox.Attribute { return i.bg }
 
 // SetBackground sets the background color to bg
-func (i *ConfirmModal) SetBackground(bg termbox.Attribute) *ConfirmModal {
+func (i *ConfirmModal) SetBackground(bg termbox.Attribute) {
 	i.bg = bg
-	return i
 }
 
 // GetForeground returns the current foreground color
 func (i *ConfirmModal) GetForeground() termbox.Attribute { return i.fg }
 
 // SetForeground sets the current foreground color to fg
-func (i *ConfirmModal) SetForeground(fg termbox.Attribute) *ConfirmModal {
+func (i *ConfirmModal) SetForeground(fg termbox.Attribute) {
 	i.fg = fg
-	return i
 }
 
 // IsDone returns whether the user has answered the modal
 func (i *ConfirmModal) IsDone() bool { return i.isDone }
 
 // SetDone sets whether the modal has completed it's purpose
-func (i *ConfirmModal) SetDone(b bool) *ConfirmModal {
+func (i *ConfirmModal) SetDone(b bool) {
 	i.isDone = b
-	return i
 }
 
 // Show sets the visibility flag of the modal to true
-func (i *ConfirmModal) Show() *ConfirmModal {
+func (i *ConfirmModal) Show() {
 	i.isVisible = true
-	return i
 }
 
 // Hide sets the visibility flag of the modal to false
-func (i *ConfirmModal) Hide() *ConfirmModal {
+func (i *ConfirmModal) Hide() {
 	i.isVisible = false
-	return i
 }
 
 // IsAccepted returns whether the user accepted the modal
 func (i *ConfirmModal) IsAccepted() bool { return i.accepted }
 
 // Clear clears all of the non-positional parameters of the modal
-func (i *ConfirmModal) Clear() *ConfirmModal {
+func (i *ConfirmModal) Clear() {
 	i.title = ""
 	i.text = ""
 	i.accepted = false
 	i.isDone = false
-	return i
 }
 
 // HandleKeyPress handles the termbox event and returns whether it was consumed

termbox_inputfield.go

@@ -27,72 +27,64 @@ func CreateInputField(x, y, w, h int, fg, bg termbox.Attribute) *InputField {
 func (i *InputField) GetValue() string { return i.value }
 
 // SetValue sets the current text in the InputField to s
-func (i *InputField) SetValue(s string) *InputField {
+func (i *InputField) SetValue(s string) {
 	i.value = s
-	return i
 }
 
 // GetX returns the x position of the input field
 func (i *InputField) GetX() int { return i.x }
 
 // SetX sets the x position of the input field
-func (i *InputField) SetX(x int) *InputField {
+func (i *InputField) SetX(x int) {
 	i.x = x
-	return i
 }
 
 // GetY returns the y position of the input field
 func (i *InputField) GetY() int { return i.y }
 
 // SetY sets the y position of the input field
-func (i *InputField) SetY(y int) *InputField {
+func (i *InputField) SetY(y int) {
 	i.y = y
-	return i
 }
 
 // GetWidth returns the current width of the input field
 func (i *InputField) GetWidth() int { return i.width }
 
 // SetWidth sets the current width of the input field
-func (i *InputField) SetWidth(w int) *InputField {
+func (i *InputField) SetWidth(w int) {
 	i.width = w
-	return i
 }
 
 // GetHeight returns the current height of the input field
 func (i *InputField) GetHeight() int { return i.height }
 
 // SetHeight sets the current height of the input field
-func (i *InputField) SetHeight(h int) *InputField {
+func (i *InputField) SetHeight(h int) {
 	i.height = h
-	return i
 }
 
 // IsBordered returns true or false if this input field has a border
 func (i *InputField) IsBordered() bool { return i.bordered }
 
 // SetBordered sets whether we render a border around the input field
-func (i *InputField) SetBordered(b bool) *InputField {
+func (i *InputField) SetBordered(b bool) {
 	i.bordered = b
-	return i
 }
 
 // DoesWrap returns true or false if this input field wraps text
 func (i *InputField) DoesWrap() bool { return i.wrap }
 
 // SetWrap sets whether we wrap the text at width.
-func (i *InputField) SetWrap(b bool) *InputField {
+func (i *InputField) SetWrap(b bool) {
 	i.wrap = b
-	return i
 }
 
 // IsMultiline returns true or false if this field can have multiple lines
 func (i *InputField) IsMultiline() bool { return i.multiline }
 
 // SetMultiline sets whether the field can have multiple lines
-func (i *InputField) SetMultiline(b bool) *InputField {
+func (i *InputField) SetMultiline(b bool) {
 	i.multiline = b
-	return i
 }
 
 // HandleKeyPress accepts the termbox event and returns whether it was consumed

termbox_inputmodal.go

@@ -30,99 +30,87 @@ func CreateInputModal(title string, x, y, width, height int, fg, bg termbox.Attr
 func (i *InputModal) GetTitle() string { return i.title }
 
 // SetTitle Sets the title of the modal to s
-func (i *InputModal) SetTitle(s string) *InputModal {
+func (i *InputModal) SetTitle(s string) {
 	i.title = s
-	return i
 }
 
 // GetText Return the text of the modal
 func (i *InputModal) GetText() string { return i.text }
 
 // SetText Set the text of the modal to s
-func (i *InputModal) SetText(s string) *InputModal {
+func (i *InputModal) SetText(s string) {
 	i.text = s
-	return i
 }
 
 // GetX Return the x position of the modal
 func (i *InputModal) GetX() int { return i.x }
 
 // SetX set the x position of the modal to x
-func (i *InputModal) SetX(x int) *InputModal {
+func (i *InputModal) SetX(x int) {
 	i.x = x
-	return i
 }
 
 // GetY Return the y position of the modal
 func (i *InputModal) GetY() int { return i.y }
 
 // SetY Set the y position of the modal to y
-func (i *InputModal) SetY(y int) *InputModal {
+func (i *InputModal) SetY(y int) {
 	i.y = y
-	return i
 }
 
 // GetWidth Return the width of the modal
 func (i *InputModal) GetWidth() int { return i.width }
 
 // SetWidth Set the width of the modal to width
-func (i *InputModal) SetWidth(width int) *InputModal {
+func (i *InputModal) SetWidth(width int) {
 	i.width = width
-	return i
 }
 
 // GetHeight Return the height of the modal
 func (i *InputModal) GetHeight() int { return i.height }
 
 // SetHeight Set the height of the modal to height
-func (i *InputModal) SetHeight(height int) *InputModal {
+func (i *InputModal) SetHeight(height int) {
 	i.height = height
-	return i
 }
 
 // HelpIsShown Returns whether the modal is showing it's help text or not
 func (i *InputModal) HelpIsShown() bool { return i.showHelp }
 
 // ShowHelp Set the "Show Help" flag
-func (i *InputModal) ShowHelp(b bool) *InputModal {
+func (i *InputModal) ShowHelp(b bool) {
 	i.showHelp = b
-	return i
 }
 
 // GetBackground Return the current background color of the modal
 func (i *InputModal) GetBackground() termbox.Attribute { return i.bg }
 
 // SetBackground Set the current background color to bg
-func (i *InputModal) SetBackground(bg termbox.Attribute) *InputModal {
+func (i *InputModal) SetBackground(bg termbox.Attribute) {
 	i.bg = bg
-	return i
 }
 
 // GetForeground Return the current foreground color
 func (i *InputModal) GetForeground() termbox.Attribute { return i.fg }
 
 // SetForeground Set the foreground color to fg
-func (i *InputModal) SetForeground(fg termbox.Attribute) *InputModal {
+func (i *InputModal) SetForeground(fg termbox.Attribute) {
 	i.fg = fg
-	return i
 }
 
 // Show Sets the visibility flag to true
-func (i *InputModal) Show() *InputModal {
+func (i *InputModal) Show() {
 	i.isVisible = true
-	return i
 }
 
 // Hide Sets the visibility flag to false
-func (i *InputModal) Hide() *InputModal {
+func (i *InputModal) Hide() {
 	i.isVisible = false
-	return i
 }
 
 // SetDone Sets the flag that tells whether this modal has completed it's purpose
-func (i *InputModal) SetDone(b bool) *InputModal {
+func (i *InputModal) SetDone(b bool) {
 	i.isDone = b
-	return i
 }
 
 // IsDone Returns the "isDone" flag
@@ -134,25 +122,22 @@ func (i *InputModal) IsDone() bool {
 func (i *InputModal) GetValue() string { return i.input.GetValue() }
 
 // SetValue Sets the value of the input to s
-func (i *InputModal) SetValue(s string) *InputModal {
+func (i *InputModal) SetValue(s string) {
 	i.input.SetValue(s)
-	return i
 }
 
 // SetInputWrap sets whether the input field will wrap long text or not
-func (i *InputModal) SetInputWrap(b bool) *InputModal {
+func (i *InputModal) SetInputWrap(b bool) {
 	i.input.SetWrap(b)
-	return i
 }
 
 // Clear Resets all non-positional parameters of the modal
-func (i *InputModal) Clear() *InputModal {
+func (i *InputModal) Clear() {
 	i.title = ""
 	i.text = ""
 	i.input.SetValue("")
 	i.isDone = false
 	i.isVisible = false
-	return i
 }
 
 // HandleKeyPress Handle the termbox event, return true if it was consumed

termbox_menu.go

@@ -39,9 +39,8 @@ func CreateMenu(title string, options []string, x, y, width, height int, fg, bg
 func (i *Menu) GetTitle() string { return i.title }
 
 // SetTitle sets the current title of the menu to s
-func (i *Menu) SetTitle(s string) *Menu {
+func (i *Menu) SetTitle(s string) {
 	i.title = s
-	return i
 }
 
 // GetOptions returns the current options of the menu
@@ -50,54 +49,49 @@ func (i *Menu) GetOptions() []MenuOption {
 }
 
 // SetOptions set the menu's options to opts
-func (i *Menu) SetOptions(opts []MenuOption) *Menu {
+func (i *Menu) SetOptions(opts []MenuOption) {
 	i.options = opts
-	return i
 }
 
 // SetOptionsFromStrings sets the options of this menu from a slice of strings
-func (i *Menu) SetOptionsFromStrings(opts []string) *Menu {
+func (i *Menu) SetOptionsFromStrings(opts []string) {
 	var newOpts []MenuOption
 	for _, v := range opts {
 		newOpts = append(newOpts, *CreateOptionFromText(v))
 	}
-	return i.SetOptions(newOpts)
+	i.SetOptions(newOpts)
 }
 
 // GetX returns the current x coordinate of the menu
 func (i *Menu) GetX() int { return i.x }
 
 // SetX sets the current x coordinate of the menu to x
-func (i *Menu) SetX(x int) *Menu {
+func (i *Menu) SetX(x int) {
 	i.x = x
-	return i
 }
 
 // GetY returns the current y coordinate of the menu
 func (i *Menu) GetY() int { return i.y }
 
 // SetY sets the current y coordinate of the menu to y
-func (i *Menu) SetY(y int) *Menu {
+func (i *Menu) SetY(y int) {
 	i.y = y
-	return i
 }
 
 // GetWidth returns the current width of the menu
 func (i *Menu) GetWidth() int { return i.width }
 
 // SetWidth sets the current menu width to width
-func (i *Menu) SetWidth(width int) *Menu {
+func (i *Menu) SetWidth(width int) {
 	i.width = width
-	return i
 }
 
 // GetHeight returns the current height of the menu
 func (i *Menu) GetHeight() int { return i.height }
 
 // SetHeight set the height of the menu to height
-func (i *Menu) SetHeight(height int) *Menu {
+func (i *Menu) SetHeight(height int) {
 	i.height = height
-	return i
 }
 
 // GetSelectedOption returns the current selected option
@@ -140,7 +134,7 @@ func (i *Menu) GetSelectedIndex() int {
 }
 
 // SetSelectedOption sets the current selected option to v (if it's valid)
-func (i *Menu) SetSelectedOption(v *MenuOption) *Menu {
+func (i *Menu) SetSelectedOption(v *MenuOption) {
 	for idx := range i.options {
 		if &i.options[idx] == v {
 			i.options[idx].Select()
@@ -148,35 +142,30 @@ func (i *Menu) SetSelectedOption(v *MenuOption) *Menu {
 			i.options[idx].Unselect()
 		}
 	}
-	return i
 }
 
 // SelectPrevOption Decrements the selected option (if it can)
-func (i *Menu) SelectPrevOption() *Menu {
+func (i *Menu) SelectPrevOption() {
 	idx := i.GetSelectedIndex()
 	for idx >= 0 {
 		idx--
 		testOption := i.GetOptionFromIndex(idx)
 		if testOption != nil && !testOption.IsDisabled() {
 			i.SetSelectedOption(testOption)
-			return i
 		}
 	}
-	return i
 }
 
 // SelectNextOption Increments the selected option (if it can)
-func (i *Menu) SelectNextOption() *Menu {
+func (i *Menu) SelectNextOption() {
 	idx := i.GetSelectedIndex()
 	for idx < len(i.options) {
 		idx++
 		testOption := i.GetOptionFromIndex(idx)
 		if testOption != nil && !testOption.IsDisabled() {
 			i.SetSelectedOption(testOption)
-			return i
 		}
 	}
-	return i
 }
 
 // SetOptionDisabled Disables the specified option
@@ -197,57 +186,50 @@ func (i *Menu) SetOptionEnabled(idx int) {
 func (i *Menu) HelpIsShown() bool { return i.showHelp }
 
 // ShowHelp sets whether or not to display the help text
-func (i *Menu) ShowHelp(b bool) *Menu {
+func (i *Menu) ShowHelp(b bool) {
 	i.showHelp = b
-	return i
 }
 
 // GetBackground returns the current background color
 func (i *Menu) GetBackground() termbox.Attribute { return i.bg }
 
 // SetBackground sets the background color to bg
-func (i *Menu) SetBackground(bg termbox.Attribute) *Menu {
+func (i *Menu) SetBackground(bg termbox.Attribute) {
 	i.bg = bg
-	return i
 }
 
 // GetForeground returns the current foreground color
 func (i *Menu) GetForeground() termbox.Attribute { return i.fg }
 
 // SetForeground sets the current foreground color to fg
-func (i *Menu) SetForeground(fg termbox.Attribute) *Menu {
+func (i *Menu) SetForeground(fg termbox.Attribute) {
 	i.fg = fg
-	return i
 }
 
 // IsDone returns whether the user has answered the modal
 func (i *Menu) IsDone() bool { return i.isDone }
 
 // SetDone sets whether the modal has completed it's purpose
-func (i *Menu) SetDone(b bool) *Menu {
+func (i *Menu) SetDone(b bool) {
 	i.isDone = b
-	return i
 }
 
 // IsBordered returns true or false if this menu has a border
 func (i *Menu) IsBordered() bool { return i.bordered }
 
 // SetBordered sets whether we render a border around the menu
-func (i *Menu) SetBordered(b bool) *Menu {
+func (i *Menu) SetBordered(b bool) {
 	i.bordered = b
-	return i
 }
 
 // EnableVimMode Enables h,j,k,l navigation
-func (i *Menu) EnableVimMode() *Menu {
+func (i *Menu) EnableVimMode() {
 	i.vimMode = true
-	return i
 }
 
 // DisableVimMode Disables h,j,k,l navigation
-func (i *Menu) DisableVimMode() *Menu {
+func (i *Menu) DisableVimMode() {
 	i.vimMode = false
-	return i
 }
 
 // HandleKeyPress handles the termbox event and returns whether it was consumed
@@ -348,24 +330,21 @@ func CreateOptionFromText(s string) *MenuOption {
 }
 
 // SetText Sets the text for this option
-func (i *MenuOption) SetText(s string) *MenuOption {
+func (i *MenuOption) SetText(s string) {
 	i.text = s
-	return i
 }
 
 // GetText Returns the text for this option
 func (i *MenuOption) GetText() string { return i.text }
 
 // Disable Sets this option to disabled
-func (i *MenuOption) Disable() *MenuOption {
+func (i *MenuOption) Disable() {
 	i.disabled = true
-	return i
 }
 
 // Enable Sets this option to enabled
-func (i *MenuOption) Enable() *MenuOption {
+func (i *MenuOption) Enable() {
 	i.disabled = false
-	return i
 }
 
 // IsDisabled returns whether this option is enabled
@@ -379,21 +358,18 @@ func (i *MenuOption) IsSelected() bool {
 }
 
 // Select Sets this option to selected
-func (i *MenuOption) Select() *MenuOption {
+func (i *MenuOption) Select() {
 	i.selected = true
-	return i
 }
 
 // Unselect Sets this option to not selected
-func (i *MenuOption) Unselect() *MenuOption {
+func (i *MenuOption) Unselect() {
 	i.selected = false
-	return i
 }
 
 // SetHelpText Sets this option's help text to s
-func (i *MenuOption) SetHelpText(s string) *MenuOption {
+func (i *MenuOption) SetHelpText(s string) {
 	i.helpText = s
-	return i
 }
 
 // GetHelpText Returns the help text for this option

termbox_progressbar.go

@@ -36,27 +36,24 @@ func (i *ProgressBar) GetProgress() int {
 }
 
 // SetProgress sets the current progress of the bar
-func (i *ProgressBar) SetProgress(p int) *ProgressBar {
+func (i *ProgressBar) SetProgress(p int) {
 	if (p <= i.total || i.allowOverflow) || (p >= 0 || i.allowUnderflow) {
 		i.progress = p
 	}
-	return i
 }
 
 // IncrProgress increments the current progress of the bar
-func (i *ProgressBar) IncrProgress() *ProgressBar {
+func (i *ProgressBar) IncrProgress() {
 	if i.progress < i.total || i.allowOverflow {
 		i.progress++
 	}
-	return i
 }
 
 // DecrProgress decrements the current progress of the bar
-func (i *ProgressBar) DecrProgress() *ProgressBar {
+func (i *ProgressBar) DecrProgress() {
 	if i.progress > 0 || i.allowUnderflow {
 		i.progress--
 	}
-	return i
 }
 
 // GetPercent returns the percent full of the bar
@@ -65,27 +62,23 @@ func (i *ProgressBar) GetPercent() int {
 }
 
 // EnableOverflow Tells the progress bar that it can go over the total
-func (i *ProgressBar) EnableOverflow() *ProgressBar {
+func (i *ProgressBar) EnableOverflow() {
 	i.allowOverflow = true
-	return i
 }
 
 // DisableOverflow Tells the progress bar that it can NOT go over the total
-func (i *ProgressBar) DisableOverflow() *ProgressBar {
+func (i *ProgressBar) DisableOverflow() {
 	i.allowOverflow = false
-	return i
 }
 
 // EnableUnderflow Tells the progress bar that it can go below zero
-func (i *ProgressBar) EnableUnderflow() *ProgressBar {
+func (i *ProgressBar) EnableUnderflow() {
 	i.allowUnderflow = true
-	return i
 }
 
 // DisableUnderflow Tells the progress bar that it can NOT go below zero
-func (i *ProgressBar) DisableUnderflow() *ProgressBar {
+func (i *ProgressBar) DisableUnderflow() {
 	i.allowUnderflow = false
-	return i
 }
 
 // GetFullChar returns the rune used for 'full'
@@ -94,9 +87,8 @@ func (i *ProgressBar) GetFullChar() rune {
 }
 
 // SetFullChar sets the rune used for 'full'
-func (i *ProgressBar) SetFullChar(f rune) *ProgressBar {
+func (i *ProgressBar) SetFullChar(f rune) {
 	i.fullChar = f
-	return i
 }
 
 // GetEmptyChar gets the rune used for 'empty'
@@ -105,27 +97,24 @@ func (i *ProgressBar) GetEmptyChar() rune {
 }
 
 // SetEmptyChar sets the rune used for 'empty'
-func (i *ProgressBar) SetEmptyChar(f rune) *ProgressBar {
+func (i *ProgressBar) SetEmptyChar(f rune) {
 	i.emptyChar = f
-	return i
 }
 
 // GetX Return the x position of the Progress Bar
 func (i *ProgressBar) GetX() int { return i.x }
 
 // SetX set the x position of the ProgressBar to x
-func (i *ProgressBar) SetX(x int) *ProgressBar {
+func (i *ProgressBar) SetX(x int) {
 	i.x = x
-	return i
 }
 
 // GetY Return the y position of the ProgressBar
 func (i *ProgressBar) GetY() int { return i.y }
 
 // SetY Set the y position of the ProgressBar to y
-func (i *ProgressBar) SetY(y int) *ProgressBar {
+func (i *ProgressBar) SetY(y int) {
 	i.y = y
-	return i
 }
 
 // GetHeight returns the height of the progress bar
@@ -135,9 +124,8 @@ func (i *ProgressBar) GetHeight() int {
 }
 
 // SetHeight Sets the height of the progress bar
-func (i *ProgressBar) SetHeight(h int) *ProgressBar {
+func (i *ProgressBar) SetHeight(h int) {
 	i.height = h
-	return i
 }
 
 // GetWidth returns the width of the progress bar
@@ -146,33 +134,29 @@ func (i *ProgressBar) GetWidth() int {
 }
 
 // SetWidth Sets the width of the progress bar
-func (i *ProgressBar) SetWidth(w int) *ProgressBar {
+func (i *ProgressBar) SetWidth(w int) {
 	i.width = w
-	return i
 }
 
 // GetBackground Return the current background color of the modal
 func (i *ProgressBar) GetBackground() termbox.Attribute { return i.bg }
 
 // SetBackground Set the current background color to bg
-func (i *ProgressBar) SetBackground(bg termbox.Attribute) *ProgressBar {
+func (i *ProgressBar) SetBackground(bg termbox.Attribute) {
 	i.bg = bg
-	return i
 }
 
 // GetForeground Return the current foreground color
 func (i *ProgressBar) GetForeground() termbox.Attribute { return i.fg }
 
 // SetForeground Set the foreground color to fg
-func (i *ProgressBar) SetForeground(fg termbox.Attribute) *ProgressBar {
+func (i *ProgressBar) SetForeground(fg termbox.Attribute) {
 	i.fg = fg
-	return i
 }
 
 // Align Tells which direction the progress bar empties
-func (i *ProgressBar) Align(a TextAlignment) *ProgressBar {
+func (i *ProgressBar) Align(a TextAlignment) {
 	i.alignment = a
-	return i
 }
 
 // SetColorized sets whether the progress bar should be colored
@@ -180,9 +164,8 @@ func (i *ProgressBar) Align(a TextAlignment) *ProgressBar {
 //  10% - Red
 //	50% - Yellow
 //	80% - Green
-func (i *ProgressBar) SetColorized(c bool) *ProgressBar {
+func (i *ProgressBar) SetColorized(c bool) {
 	i.colorized = c
-	return i
 }
 
 // HandleKeyPress accepts the termbox event and returns whether it was consumed

termbox_scrollframe.go

@@ -0,0 +1,155 @@
+package termboxUtil
+
+import "github.com/nsf/termbox-go"
+
+// ScrollFrame is a frame for holding other elements
+// It manages it's own x/y, tab index
+type ScrollFrame struct {
+	x, y, width, height int
+	scrollX, scrollY    int
+	tabIdx              int
+	fg, bg              termbox.Attribute
+	bordered            bool
+	controls            []termboxControl
+}
+
+// CreateScrollFrame creates Scrolling Frame at x, y that is w by h
+func CreateScrollFrame(x, y, w, h int, fg, bg termbox.Attribute) *ScrollFrame {
+	s := ScrollFrame{x: x, y: y, width: w, height: h, fg: fg, bg: bg}
+	return &s
+}
+
+// GetX returns the x position of the scroll frame
+func (s *ScrollFrame) GetX() int { return s.x }
+
+// SetX sets the x position of the scroll frame
+func (s *ScrollFrame) SetX(x int) {
+	s.x = x
+}
+
+// GetY returns the y position of the scroll frame
+func (s *ScrollFrame) GetY() int { return s.y }
+
+// SetY sets the y position of the scroll frame
+func (s *ScrollFrame) SetY(y int) {
+	s.y = y
+}
+
+// GetWidth returns the current width of the scroll frame
+func (s *ScrollFrame) GetWidth() int { return s.width }
+
+// SetWidth sets the current width of the scroll frame
+func (s *ScrollFrame) SetWidth(w int) {
+	s.width = w
+}
+
+// GetHeight returns the current height of the scroll frame
+func (s *ScrollFrame) GetHeight() int { return s.height }
+
+// SetHeight sets the current height of the scroll frame
+func (s *ScrollFrame) SetHeight(h int) {
+	s.height = h
+}
+
+// IsBordered returns true or false if this scroll frame has a border
+func (s *ScrollFrame) IsBordered() bool { return s.bordered }
+
+// SetBordered sets whether we render a border around the scroll frame
+func (s *ScrollFrame) SetBordered(b bool) {
+	s.bordered = b
+}
+
+// GetScrollX returns the x distance scrolled
+func (s *ScrollFrame) GetScrollX() int {
+	return s.scrollX
+}
+
+// GetScrollY returns the y distance scrolled
+func (s *ScrollFrame) GetScrollY() int {
+	return s.scrollY
+}
+
+// ScrollDown scrolls the frame down
+func (s *ScrollFrame) ScrollDown() {
+	s.scrollY++
+}
+
+// ScrollUp scrolls the frame up
+func (s *ScrollFrame) ScrollUp() {
+	if s.scrollY > 0 {
+		s.scrollY--
+	}
+}
+
+// ScrollLeft scrolls the frame left
+func (s *ScrollFrame) ScrollLeft() {
+	if s.scrollX > 0 {
+		s.scrollX--
+	}
+}
+
+// ScrollRight scrolls the frame right
+func (s *ScrollFrame) ScrollRight() {
+	s.scrollX++
+}
+
+// AddControl adds a control to the frame
+func (s *ScrollFrame) AddControl(t termboxControl) {
+	s.controls = append(s.controls, t)
+}
+
+// DrawControl figures out the relative position of the control,
+// sets it, draws it, then resets it.
+func (s *ScrollFrame) DrawControl(t termboxControl) {
+	if s.IsVisible(t) {
+		ctlX, ctlY := t.GetX(), t.GetY()
+		t.SetX((s.GetX() + ctlX))
+		t.SetY((s.GetY() + ctlY))
+		t.Draw()
+		t.SetX(ctlX)
+		t.SetY(ctlY)
+	}
+}
+
+// IsVisible takes a Termbox Control and returns whether
+// that control would be visible in the frame
+func (s *ScrollFrame) IsVisible(t termboxControl) bool {
+	// Check if any part of t should be visible
+	cX, cY := t.GetX(), t.GetY()
+	if cX+t.GetWidth() >= s.scrollX && cX <= s.scrollX+s.width {
+		return cY+t.GetHeight() >= s.scrollY && cY <= s.scrollY+s.height
+	}
+	return false
+}
+
+// HandleKeyPress accepts the termbox event and returns whether it was consumed
+func (s *ScrollFrame) HandleKeyPress(event termbox.Event) bool {
+	return false
+}
+
+// DrawToStrings generates a slice of strings with what should
+// be drawn to the screen
+func (s *ScrollFrame) DrawToStrings() []string {
+	return []string{}
+}
+
+// Draw outputs the Scoll Frame on the screen
+func (s *ScrollFrame) Draw() {
+	maxWidth := s.width
+	maxHeight := s.height
+	x, y := s.x, s.y
+	startX := s.x
+	startY := s.y
+	if s.bordered {
+		DrawBorder(s.x, s.y, s.x+s.width, s.y+s.height, s.fg, s.bg)
+		maxWidth--
+		maxHeight--
+		x++
+		y++
+		startX++
+		startY++
+	}
+	for i := range s.controls {
+		s.DrawControl(s.controls[i])
+	}
+}

termbox_util.go

@@ -7,6 +7,19 @@ import (
 	"github.com/nsf/termbox-go"
 )
 
+type termboxControl interface {
+	GetX() int
+	SetX(int)
+	GetY() int
+	SetY(int)
+	GetWidth() int
+	SetWidth(int)
+	GetHeight() int
+	SetHeight(int)
+	HandleKeyPress(termbox.Event) bool
+	Draw()
+}
+
 // TextAlignment is an int value for how we're aligning text
 type TextAlignment int