149 lines
3.1 KiB
Go
149 lines
3.1 KiB
Go
package d2ui
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import (
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2resource"
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"github.com/OpenDiablo2/OpenDiablo2/d2core/d2asset"
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"github.com/OpenDiablo2/OpenDiablo2/d2core/d2render"
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)
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type Scrollbar struct {
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x, y, height int
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visible bool
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enabled bool
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currentOffset int
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maxOffset int
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lastDirChange int
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onActivate func()
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scrollbarSprite *Sprite
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}
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func CreateScrollbar(x, y, height int) Scrollbar {
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animation, _ := d2asset.LoadAnimation(d2resource.Scrollbar, d2resource.PaletteSky)
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scrollbarSprite, _ := LoadSprite(animation)
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result := Scrollbar{
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visible: true,
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enabled: true,
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x: x,
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y: y,
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height: height,
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scrollbarSprite: scrollbarSprite,
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}
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return result
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}
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func (v Scrollbar) GetEnabled() bool {
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return v.enabled
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}
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func (v *Scrollbar) SetEnabled(enabled bool) {
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v.enabled = enabled
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}
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func (v *Scrollbar) SetPressed(pressed bool) {}
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func (v *Scrollbar) GetPressed() bool { return false }
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func (v *Scrollbar) OnActivated(callback func()) {
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v.onActivate = callback
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}
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func (v Scrollbar) getBarPosition() int {
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return int((float32(v.currentOffset) / float32(v.maxOffset)) * float32(v.height-30))
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}
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func (v *Scrollbar) Activate() {
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_, my := CursorPosition()
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barPosition := v.getBarPosition()
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if my <= v.y+barPosition+15 {
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if v.currentOffset > 0 {
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v.currentOffset--
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v.lastDirChange = -1
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}
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} else {
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if v.currentOffset < v.maxOffset {
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v.currentOffset++
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v.lastDirChange = 1
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}
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}
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if v.onActivate != nil {
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v.onActivate()
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}
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}
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func (v *Scrollbar) GetLastDirChange() int {
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return v.lastDirChange
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}
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func (v *Scrollbar) Render(target d2render.Surface) {
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if !v.visible || v.maxOffset == 0 {
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return
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}
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offset := 0
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if !v.enabled {
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offset = 2
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}
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v.scrollbarSprite.SetPosition(v.x, v.y)
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v.scrollbarSprite.RenderSegmented(target, 1, 1, 0+offset)
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v.scrollbarSprite.SetPosition(v.x, v.y+v.height-10)
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v.scrollbarSprite.RenderSegmented(target, 1, 1, 1+offset)
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if v.maxOffset == 0 || v.currentOffset < 0 || v.currentOffset > v.maxOffset {
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return
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}
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v.scrollbarSprite.SetPosition(v.x, v.y+10+v.getBarPosition())
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offset = 0
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if !v.enabled {
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offset = 1
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}
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v.scrollbarSprite.RenderSegmented(target, 1, 1, 4+offset)
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}
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func (v *Scrollbar) Advance(elapsed float64) {
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v.scrollbarSprite.Advance(elapsed)
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}
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func (v *Scrollbar) GetSize() (width, height int) {
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return 10, v.height
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}
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func (v *Scrollbar) SetPosition(x, y int) {
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v.x = x
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v.y = y
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}
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func (v *Scrollbar) GetPosition() (x, y int) {
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return v.x, v.y
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}
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func (v *Scrollbar) GetVisible() bool {
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return v.visible
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}
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func (v *Scrollbar) SetVisible(visible bool) {
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v.visible = visible
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}
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func (v *Scrollbar) SetMaxOffset(maxOffset int) {
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v.maxOffset = maxOffset
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if v.maxOffset < 0 {
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v.maxOffset = 0
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}
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if v.currentOffset > v.maxOffset {
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v.currentOffset = v.maxOffset
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}
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if v.maxOffset == 0 {
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v.currentOffset = 0
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}
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}
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func (v *Scrollbar) SetCurrentOffset(currentOffset int) {
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v.currentOffset = currentOffset
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}
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func (v *Scrollbar) GetMaxOffset() int {
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return v.maxOffset
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}
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func (v *Scrollbar) GetCurrentOffset() int {
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return v.currentOffset
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}
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