feat: better custom methods for panels.

cmd/test/incdec.go

@@ -9,54 +9,47 @@ import (
 // how to store and get session data values
 // and working with dynamic panels.
 var IncDecWidget = tg.RenderFunc(func(c tg.Context) tg.UI {
-	var (
-		kbd *tg.InlineCompo
-		//cntMsg *tg.MessageCompo
-		inline, std, onlyInc, onlyDec tg.Inline
-	)
-
-	d := ExtractSessionData(c)
-	format := "Press the buttons to increment and decrement.\n" +
+	const format = "Press the buttons" +
+		"to increment and decrement.\n" +
 		"Current counter value = %d"
-
-	incBtn := tg.Buttonf("+").WithAction(tg.Func(func(c tg.Context) {
-		d.Counter++
-		kbd.Text = fmt.Sprintf(format, d.Counter)
-		if d.Counter == 5 {
-			kbd.Inline = onlyDec
-		} else {
-			kbd.Inline = std
-		}
-		kbd.Update(c)
-	}))
-	decBtn := tg.Buttonf("-").WithAction(tg.Func(func(c tg.Context) {
-		d.Counter--
-		kbd.Text = fmt.Sprintf(format, d.Counter)
-		if d.Counter == -5 {
-			kbd.Inline = onlyInc
-		} else {
-			kbd.Inline = std
-		}
-		kbd.Update(c)
-		//c.Sendf("%d", d.Counter)
-	}))
-
-	onlyInc = tg.NewKeyboard().Row(incBtn).Inline()
-	onlyDec = tg.NewKeyboard().Row(decBtn).Inline()
-	std = tg.NewKeyboard().Row(incBtn, decBtn).Inline()
-
-	if d.Counter == 5 {
-		inline = onlyDec
-	} else if d.Counter == -5 {
-		inline = onlyInc
-	} else {
-		inline = std
-	}
-
-	kbd = tg.Messagef(format, d.Counter).Inline(inline)
-
+	d := ExtractSessionData(c)
 	return tg.UI{
-		kbd,
+		tg.Messagef(format, d.Counter).Panel(
+			c,
+			tg.PanelFunc(func(
+				panel *tg.PanelCompo,
+				c tg.Context,
+			) []tg.ButtonRow {
+				d := ExtractSessionData(c)
+				row := tg.ButtonRow{}
+				if d.Counter != -5 {
+					row = append(
+						row,
+						tg.Buttonf(
+							"-",
+						).WithAction(tg.Func(func(c tg.Context){
+							d.Counter--
+							panel.Text = fmt.Sprintf(format, d.Counter)
+							c.Update(panel)
+						})),
+					)
+				}
+				if d.Counter != +5 {
+					row = append(
+						row,
+						tg.Buttonf(
+							"+",
+						).WithAction(tg.Func(func(c tg.Context){
+							d.Counter++
+							panel.Text = fmt.Sprintf(format, d.Counter)
+							c.Update(panel)
+						})),
+					)
+				}
+
+				return []tg.ButtonRow{row}
+			}),
+		),
 		tg.Messagef("Use the reply keyboard to get back").Reply(
 			BackKeyboard.Reply(),
 		),

cmd/test/panel.go

@@ -8,7 +8,10 @@ var DynamicPanelWidget = tg.RenderFunc(func(c tg.Context) tg.UI {
 	return tg.UI{
 		tg.Messagef("Paged panel").PanelPager(
 			c, 0, 5,
-			tg.PanelPagerFunc(func(c tg.Context, page, size int) tg.PanelPage {
+			tg.PanelPagerFunc(func(
+				panel *tg.PanelPagerCompo,
+				c tg.Context, page, size int,
+			) tg.PanelPage {
 				rows := []tg.ButtonRow{}
 				for i := 0; i < size; i++ {
 					num := 1 + page*size + i

context.go

@@ -178,6 +178,10 @@ func (c Context) ReadString(promptf string, args ...any) string {
 	return text
 }
 
+func (c Context) Update(updater Updater) error {
+	return updater.Update(c)
+}
+
 func (c Context) CallbackUpdate() *Update {
 	return &c.update
 }

paged-panel.go

@@ -1,7 +1,10 @@
 package tg
 
 type PanelPager interface {
-	GetPanelPage(c Context, page, size int) PanelPage
+	GetPanelPage(
+		panel *PanelPagerCompo,
+		c Context, page, size int,
+	) PanelPage
 }
 
 type PanelPage struct {
@@ -10,12 +13,13 @@ type PanelPage struct {
 }
 
 type PanelPagerFunc func(
+	panel *PanelPagerCompo,
 	c Context, page, size int,
 ) PanelPage
 func (fn PanelPagerFunc) GetPanelPage(
-	c Context, page, size int,
+	panel *PanelPagerCompo, c Context, page, size int,
 ) PanelPage {
-	return fn(c, page, size)
+	return fn(panel, c, page, size)
 }
 
 type PanelPagerCompo struct {
@@ -46,11 +50,11 @@ func (compo *MessageCompo) PanelPager(
 	return ret
 }
 
-func (panel *PanelPagerCompo) MakeRows(
-	c Context,
+func (panel *PanelPagerCompo) GetPanelRows(
+	pcompo *PanelCompo, c Context,
 ) []ButtonRow {
 	page := panel.pager.GetPanelPage(
-		c, panel.page, panel.size,
+		panel, c, panel.page, panel.size,
 	)
 
 	controlRow := ButtonRow{}

panel.go

@@ -1,5 +1,7 @@
 package tg
 
+// Using the interface and all related is
+// deprecated. Use the Paneler interface and function.
 type Rowser interface {
 	MakeRows(c Context) []ButtonRow
 }
@@ -9,32 +11,45 @@ func (fn RowserFunc) MakeRows(c Context) []ButtonRow {
 	return fn(c)
 }
 
+type Paneler interface {
+	GetPanelRows(*PanelCompo, Context) []ButtonRow
+}
+
+type PanelFunc func(*PanelCompo, Context) []ButtonRow
+func (fn PanelFunc) GetPanelRows(
+	panel *PanelCompo, c Context,
+) []ButtonRow {
+	return fn(panel, c)
+}
+
 // The type represents the inline panel with
 // scrollable via buttons content.
 // Can be used for example to show users via SQL and offset
 // or something like that.
 type PanelCompo struct {
 	InlineCompo
-	Rowser Rowser
+	Paneler Paneler
 }
 
 // Transform to the panel with dynamic rows.
 func (compo *MessageCompo) Panel(
 	c Context, // The context to generate the first page of buttons.
-	rowser Rowser, // The rows generator.
+	paneler Paneler, // The rows generator.
 ) *PanelCompo {
 	ret := &PanelCompo{}
+	ret.Paneler = paneler
+
 	ret.InlineCompo = (*compo.Inline(
 		NewKeyboard(
-			rowser.MakeRows(c)...,
+			ret.Paneler.GetPanelRows(ret, c)...,
 		).Inline(),
 	))
-	ret.Rowser = rowser
 	return ret
 }
 
-func (compo *PanelCompo) Update(c Context) {
-	compo.Rows = compo.Rowser.MakeRows(c)
-	compo.InlineCompo.Update(c)
+// Implementing the Updater.
+func (panel *PanelCompo) Update(c Context) error {
+	panel.Rows = panel.Paneler.GetPanelRows(panel, c)
+	return panel.InlineCompo.Update(c)
 }
 

updater.go

@@ -0,0 +1,9 @@
+package tg
+
+// Implementing the type provides
+// way to update stuff on the client side.
+// Things like panels, messages etc.
+type Updater interface {
+	Update(Context) error
+}
+