Various improvements.

application.go

@@ -106,10 +106,6 @@ func (a *Application) Run() error {
 	}()
 
 	// Draw the screen for the first time.
-	if a.rootAutoSize && a.root != nil {
-		width, height := a.screen.Size()
-		a.root.SetRect(0, 0, width, height)
-	}
 	a.Unlock()
 	a.Draw()
 
@@ -201,6 +197,12 @@ func (a *Application) Draw() *Application {
 		return a
 	}
 
+	// Resize if requested.
+	if a.rootAutoSize && a.root != nil {
+		width, height := a.screen.Size()
+		a.root.SetRect(0, 0, width, height)
+	}
+
 	// Draw all primitives.
 	a.root.Draw(a.screen)
 
@@ -219,6 +221,9 @@ func (a *Application) SetRoot(root Primitive, autoSize bool) *Application {
 	a.Lock()
 	a.root = root
 	a.rootAutoSize = autoSize
+	if a.screen != nil {
+		a.screen.Clear()
+	}
 	a.Unlock()
 
 	a.SetFocus(root)

frame.go

@@ -64,8 +64,8 @@ func (f *Frame) AddText(text string, header bool, align int, color tcell.Color)
 	return f
 }
 
-// ClearText removes all text from the frame.
-func (f *Frame) ClearText() *Frame {
+// Clear removes all text from the frame.
+func (f *Frame) Clear() *Frame {
 	f.text = nil
 	return f
 }

modal.go

@@ -111,7 +111,7 @@ func (m *Modal) Draw(screen tcell.Screen) {
 	// width is now without the box border.
 
 	// Reset the text and find out how wide it is.
-	m.frame.ClearText()
+	m.frame.Clear()
 	lines := WordWrap(m.text, width)
 	for _, line := range lines {
 		m.frame.AddText(line, true, AlignCenter, m.textColor)

pages.go

@@ -78,6 +78,16 @@ func (p *Pages) RemovePage(name string) *Pages {
 	return p
 }
 
+// HasPage returns true if a page with the given name exists in this object.
+func (p *Pages) HasPage(name string) bool {
+	for _, page := range p.pages {
+		if page.Name == name {
+			return true
+		}
+	}
+	return false
+}
+
 // ShowPage sets a page's visibility to "true" (in addition to any other pages
 // which are already visible).
 func (p *Pages) ShowPage(name string) *Pages {

table.go

@@ -257,6 +257,12 @@ func (t *Table) SetCell(row, column int, cell *TableCell) *Table {
 	return t
 }
 
+// SetCellSimple calls SetCell() with the given text, left-aligned, in white.
+func (t *Table) SetCellSimple(row, column int, text string) *Table {
+	t.SetCell(row, column, &TableCell{Text: text, Align: AlignLeft, Color: tcell.ColorWhite})
+	return t
+}
+
 // GetCell returns the contents of the cell at the specified position. A valid
 // TableCell object is always returns but it will be uninitialized if the cell
 // was not previously set.
@@ -267,6 +273,19 @@ func (t *Table) GetCell(row, column int) *TableCell {
 	return t.cells[row][column]
 }
 
+// GetRowCount returns the number of rows in the table.
+func (t *Table) GetRowCount() int {
+	return len(t.cells)
+}
+
+// GetColumnCount returns the (maximum) number of columns in the table.
+func (t *Table) GetColumnCount() int {
+	if len(t.cells) == 0 {
+		return 0
+	}
+	return t.lastColumn + 1
+}
+
 // ScrollToBeginning scrolls the table to the beginning to that the top left
 // corner of the table is shown. Note that this position may be corrected if
 // there is a selection.