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Code Issues Projects Releases Wiki Activity

Create abtract scrollable widget

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This cleans up a bunch of boilerplate for scrollable items and standardizes their usage
This commit is contained in:
Sean Smith
2019-05-09 22:43:01 -04:00
parent 0b59a3b62f
commit 210723cd74
17 changed files with 232 additions and 470 deletions
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13
modules/hackernews/keyboard.go
View File

@@ -1,18 +1,17 @@
package hackernews
import "github.com/gdamore/tcell"
func (widget *Widget) initializeKeyboardControls() {
widget.SetKeyboardChar("/", widget.ShowHelp)
widget.SetKeyboardChar("j", widget.next)
widget.SetKeyboardChar("k", widget.prev)
widget.SetKeyboardChar("j", widget.Next)
widget.SetKeyboardChar("k", widget.Prev)
widget.SetKeyboardChar("o", widget.openStory)
widget.SetKeyboardChar("r", widget.Refresh)
widget.SetKeyboardChar("c", widget.openComments)
widget.SetKeyboardKey(tcell.KeyDown, widget.next)
widget.SetKeyboardKey(tcell.KeyDown, widget.Next)
widget.SetKeyboardKey(tcell.KeyEnter, widget.openStory)
widget.SetKeyboardKey(tcell.KeyEsc, widget.unselect)
widget.SetKeyboardKey(tcell.KeyUp, widget.prev)
}
widget.SetKeyboardKey(tcell.KeyEsc, widget.Unselect)
widget.SetKeyboardKey(tcell.KeyUp, widget.Prev)
}

96
modules/hackernews/widget.go
View File

@@ -3,7 +3,6 @@ package hackernews
import (
"fmt"
"net/url"
"strconv"
"strings"
"github.com/rivo/tview"
@@ -28,33 +27,25 @@ const HelpText = `
type Widget struct {
wtf.HelpfulWidget
wtf.KeyboardWidget
wtf.TextWidget
app *tview.Application
wtf.ScrollableWidget
stories []Story
selected int
settings *Settings
}
func NewWidget(app *tview.Application, pages *tview.Pages, settings *Settings) *Widget {
widget := Widget{
HelpfulWidget: wtf.NewHelpfulWidget(app, pages, HelpText),
KeyboardWidget: wtf.NewKeyboardWidget(),
TextWidget: wtf.NewTextWidget(app, settings.common, true),
HelpfulWidget: wtf.NewHelpfulWidget(app, pages, HelpText),
KeyboardWidget: wtf.NewKeyboardWidget(),
ScrollableWidget: wtf.NewScrollableWidget(app, settings.common, true),
app: app,
settings: settings,
}
widget.SetRenderFunction(widget.Render)
widget.initializeKeyboardControls()
widget.View.SetInputCapture(widget.InputCapture)
widget.unselect()
widget.View.SetScrollable(true)
widget.View.SetRegions(true)
widget.HelpfulWidget.SetView(widget.View)
return &widget
@@ -73,38 +64,34 @@ func (widget *Widget) Refresh() {
}
if err != nil {
widget.View.SetWrap(true)
widget.View.SetTitle(widget.ContextualTitle(widget.CommonSettings.Title))
widget.View.SetText(err.Error())
} else {
var stories []Story
for idx := 0; idx < widget.settings.numberOfStories; idx++ {
story, e := GetStory(storyIds[idx])
if e != nil {
// panic(e)
} else {
stories = append(stories, story)
}
widget.Redraw(widget.CommonSettings.Title, err.Error(), true)
return
}
var stories []Story
for idx := 0; idx < widget.settings.numberOfStories; idx++ {
story, e := GetStory(storyIds[idx])
if e != nil {
// panic(e)
} else {
stories = append(stories, story)
}
widget.stories = stories
}
widget.display()
widget.stories = stories
widget.SetItemCount(len(stories))
widget.Render()
}
/* -------------------- Unexported Functions -------------------- */
func (widget *Widget) display() {
func (widget *Widget) Render() {
if widget.stories == nil {
return
}
title := fmt.Sprintf("%s - %sstories", widget.CommonSettings.Title, widget.settings.storyType)
widget.Redraw(title, widget.contentFrom(widget.stories), false)
widget.app.QueueUpdateDraw(func() {
widget.View.Highlight(strconv.Itoa(widget.selected)).ScrollToHighlight()
})
}
func (widget *Widget) contentFrom(stories []Story) string {
@@ -114,9 +101,9 @@ func (widget *Widget) contentFrom(stories []Story) string {
str = str + fmt.Sprintf(
`["%d"][""][%s] [yellow]%d. [%s]%s [blue](%s)[""]`,
idx,
widget.rowColor(idx),
widget.RowColor(idx),
idx+1,
widget.rowColor(idx),
widget.RowColor(idx),
story.Title,
strings.TrimPrefix(u.Host, "www."),
)
@@ -127,49 +114,18 @@ func (widget *Widget) contentFrom(stories []Story) string {
return str
}
func (widget *Widget) rowColor(idx int) string {
if widget.View.HasFocus() && (idx == widget.selected) {
return widget.settings.common.DefaultFocussedRowColor()
}
return widget.settings.common.RowColor(idx)
}
func (widget *Widget) next() {
widget.selected++
if widget.stories != nil && widget.selected >= len(widget.stories) {
widget.selected = 0
}
widget.display()
}
func (widget *Widget) prev() {
widget.selected--
if widget.selected < 0 && widget.stories != nil {
widget.selected = len(widget.stories) - 1
}
widget.display()
}
func (widget *Widget) openStory() {
sel := widget.selected
sel := widget.GetSelected()
if sel >= 0 && widget.stories != nil && sel < len(widget.stories) {
story := &widget.stories[widget.selected]
story := &widget.stories[sel]
wtf.OpenFile(story.URL)
}
}
func (widget *Widget) openComments() {
sel := widget.selected
sel := widget.GetSelected()
if sel >= 0 && widget.stories != nil && sel < len(widget.stories) {
story := &widget.stories[widget.selected]
story := &widget.stories[sel]
wtf.OpenFile(fmt.Sprintf("https://news.ycombinator.com/item?id=%d", story.ID))
}
}
func (widget *Widget) unselect() {
widget.selected = -1
widget.display()
}