style disappears #509
Description
Thank you for your Work!
In the following simplified example I try to draw a colored frame at the edges of the screen area.
Clearing the screen and drawing the frame before entering the event-loop as the tutorial suggests creates the frame (the characters are displayed) but the top line and the first cell in the second line loos their style. Moving the clearing and frame drawing inside the resize event shows initially the expected behavior. But if I resize the terminal-window (gnome-terminal, vim-terminal) by making the window smaller the problem seems to reoccur for every second line the window gets smaller. Making the window larger shows always the expected behavior.
package main
import (
"log"
"os"
"github.com/gdamore/tcell/v2"
)
func main() {
defStyle := tcell.StyleDefault.Background(
tcell.ColorBlack).Foreground(tcell.ColorWhite)
frmStyle := tcell.StyleDefault.Background(
tcell.ColorWhite).Foreground(tcell.ColorBlack)
scr, err := tcell.NewScreen()
if err != nil {
log.Fatalf("%+v", err)
}
if err := scr.Init(); err != nil {
log.Fatalf("%+v", err)
}
scr.SetStyle(defStyle)
quit := func() {
scr.Fini()
os.Exit(0)
}
frame := func() {
w, h := scr.Size()
for x, y := 0, 0; x < w; x++ {
scr.SetContent(x, y, 't', nil, frmStyle)
}
for x, y := 0, h-1; x < w; x++ {
scr.SetContent(x, y, 'b', nil, frmStyle)
}
for x, y := 0, 1; y < h-1; y++ {
scr.SetContent(x, y, 'l', nil, frmStyle)
}
for x, y := w-1, 1; y < h-1; y++ {
scr.SetContent(x, y, 'r', nil, frmStyle)
}
}
// BUG the first line and the first cell of the second line loose
// their style; comment the following clearing and frame drawing out
// and uncomment it in the resize event to see the expected behavior
scr.Clear()
frame()
for {
// Update screen
scr.Show()
// Poll event
ev := scr.PollEvent()
// Process event
switch ev.(type) {
case *tcell.EventResize:
// BUG uncomment the following clearing and frame drawing
// while the above clearing and frame drawing is comment out,
// to see the expected initial behavior. But resizing the
// terminal window by making it smaller still shows this problem.
// scr.Clear()
// frame()
scr.Sync()
case *tcell.EventKey:
quit()
}
}
}