package d2ui import ( "github.com/OpenDiablo2/OpenDiablo2/d2common/d2interface" "github.com/OpenDiablo2/OpenDiablo2/d2common/d2resource" "github.com/OpenDiablo2/OpenDiablo2/d2core/d2asset" ) type Scrollbar struct { x, y, height int visible bool enabled bool currentOffset int maxOffset int lastDirChange int onActivate func() scrollbarSprite *Sprite } func CreateScrollbar(x, y, height int) Scrollbar { animation, _ := d2asset.LoadAnimation(d2resource.Scrollbar, d2resource.PaletteSky) scrollbarSprite, _ := LoadSprite(animation) result := Scrollbar{ visible: true, enabled: true, x: x, y: y, height: height, scrollbarSprite: scrollbarSprite, } return result } func (v Scrollbar) GetEnabled() bool { return v.enabled } func (v *Scrollbar) SetEnabled(enabled bool) { v.enabled = enabled } func (v *Scrollbar) SetPressed(pressed bool) {} func (v *Scrollbar) GetPressed() bool { return false } func (v *Scrollbar) OnActivated(callback func()) { v.onActivate = callback } func (v Scrollbar) getBarPosition() int { return int((float32(v.currentOffset) / float32(v.maxOffset)) * float32(v.height-30)) } func (v *Scrollbar) Activate() { _, my := CursorPosition() barPosition := v.getBarPosition() if my <= v.y+barPosition+15 { if v.currentOffset > 0 { v.currentOffset-- v.lastDirChange = -1 } } else { if v.currentOffset < v.maxOffset { v.currentOffset++ v.lastDirChange = 1 } } if v.onActivate != nil { v.onActivate() } } func (v *Scrollbar) GetLastDirChange() int { return v.lastDirChange } func (v *Scrollbar) Render(target d2interface.Surface) { if !v.visible || v.maxOffset == 0 { return } offset := 0 if !v.enabled { offset = 2 } v.scrollbarSprite.SetPosition(v.x, v.y) v.scrollbarSprite.RenderSegmented(target, 1, 1, 0+offset) v.scrollbarSprite.SetPosition(v.x, v.y+v.height-10) v.scrollbarSprite.RenderSegmented(target, 1, 1, 1+offset) if v.maxOffset == 0 || v.currentOffset < 0 || v.currentOffset > v.maxOffset { return } v.scrollbarSprite.SetPosition(v.x, v.y+10+v.getBarPosition()) offset = 0 if !v.enabled { offset = 1 } v.scrollbarSprite.RenderSegmented(target, 1, 1, 4+offset) } func (v *Scrollbar) Advance(elapsed float64) { v.scrollbarSprite.Advance(elapsed) } func (v *Scrollbar) GetSize() (width, height int) { return 10, v.height } func (v *Scrollbar) SetPosition(x, y int) { v.x = x v.y = y } func (v *Scrollbar) GetPosition() (x, y int) { return v.x, v.y } func (v *Scrollbar) GetVisible() bool { return v.visible } func (v *Scrollbar) SetVisible(visible bool) { v.visible = visible } func (v *Scrollbar) SetMaxOffset(maxOffset int) { v.maxOffset = maxOffset if v.maxOffset < 0 { v.maxOffset = 0 } if v.currentOffset > v.maxOffset { v.currentOffset = v.maxOffset } if v.maxOffset == 0 { v.currentOffset = 0 } } func (v *Scrollbar) SetCurrentOffset(currentOffset int) { v.currentOffset = currentOffset } func (v *Scrollbar) GetMaxOffset() int { return v.maxOffset } func (v *Scrollbar) GetCurrentOffset() int { return v.currentOffset }