diff options
Diffstat (limited to 'stack.go')
| -rw-r--r-- | stack.go | 23 |
1 files changed, 21 insertions, 2 deletions
@@ -13,12 +13,18 @@ const ( Vertical ) -// A Stack stacks controls horizontally or vertically within the Stack's parent, alotting each the same size. +// A Stack stacks controls horizontally or vertically within the Stack's parent. +// A horizontal Stack gives all controls the same height and their preferred widths. +// A vertical Stack gives all controls the same width and their preferred heights. +// Some controls may be marked as "stretchy": when the Window they are in changes size, stretchy controls resize to take up the remaining space after non-stretchy controls are laid out. If multiple controls are marked stretchy, they are alloted equal distribution of the remaining space. type Stack struct { lock sync.Mutex created bool orientation Orientation controls []Control + stretchy []bool + xpos, ypos []int // caches to avoid reallocating these each time + width, height []int } // NewStack creates a new Stack with the specified orientation. @@ -29,14 +35,27 @@ func NewStack(o Orientation, controls ...Control) *Stack { return &Stack{ orientation: o, controls: controls, + stretchy: make([]bool, len(controls)), + xpos: make([]int, len(controls)), + ypos: make([]int, len(controls)), + width: make([]int, len(controls)), + height: make([]int, len(controls)), } } +// SetStretchy marks a control in a Stack as stretchy. +func (s *Stack) SetStretchy(index int) { + s.lock.Lock() + defer s.lock.Unlock() + + s[index] = true // TODO explicitly check for index out of bounds? +} + func (s *Stack) make(window *sysData) error { for i, c := range s.controls { err := c.make(window) if err != nil { - return fmt.Errorf("error adding control %d: %v", i, err) + return fmt.Errorf("error adding control %d to Stack: %v", i, err) } } s.created = true |