diff options
Diffstat (limited to 'grid.go')
| -rw-r--r-- | grid.go | 11 |
1 files changed, 11 insertions, 0 deletions
@@ -4,6 +4,7 @@ package ui import ( "fmt" + "sync" ) // A Grid arranges Controls in a two-dimensional grid. @@ -15,6 +16,7 @@ import ( // A stretchy Control implicitly fills its cell. // All cooridnates in a Grid are given in (row,column) form with (0,0) being the top-left cell. type Grid struct { + lock sync.Mutex created bool controls [][]Control filling [][]bool @@ -67,6 +69,9 @@ func NewGrid(nPerRow int, controls ...Control) *Grid { // This function cannot be called after the Window that contains the Grid has been created. // It panics if the given coordinate is invalid. func (g *Grid) SetFilling(row int, column int) { + g.lock.Lock() + defer g.lock.Unlock() + if g.created { panic(fmt.Errorf("Grid.SetFilling() called after window create")) } @@ -82,6 +87,9 @@ func (g *Grid) SetFilling(row int, column int) { // This function cannot be called after the Window that contains the Grid has been created. // It panics if the given coordinate is invalid. func (g *Grid) SetStretchy(row int, column int) { + g.lock.Lock() + defer g.lock.Unlock() + if g.created { panic(fmt.Errorf("Grid.SetFilling() called after window create")) } @@ -94,6 +102,9 @@ func (g *Grid) SetStretchy(row int, column int) { } func (g *Grid) make(window *sysData) error { + g.lock.Lock() + defer g.lock.Unlock() + // commit filling for the stretchy control now (see SetStretchy() above) if g.stretchyrow != -1 && g.stretchycol != -1 { g.filling[g.stretchyrow][g.stretchycol] = true |