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mirror of https://github.com/OpenDiablo2/OpenDiablo2 synced 2024-10-31 16:27:18 -04:00
OpenDiablo2/ui/Manager.go
2019-11-06 22:12:15 -05:00

149 lines
3.8 KiB
Go

package ui
import (
"github.com/OpenDiablo2/OpenDiablo2/common"
"github.com/OpenDiablo2/OpenDiablo2/palettedefs"
"github.com/OpenDiablo2/OpenDiablo2/resourcepaths"
"github.com/OpenDiablo2/OpenDiablo2/sound"
"github.com/hajimehoshi/ebiten"
)
// CursorButton represents a mouse button
type CursorButton uint8
const (
// CursorButtonLeft represents the left mouse button
CursorButtonLeft CursorButton = 1
// CursorButtonRight represents the right mouse button
CursorButtonRight CursorButton = 2
)
// Manager represents the UI manager
type Manager struct {
widgets []Widget
cursorSprite *common.Sprite
cursorButtons CursorButton
pressedIndex int
CursorX int
CursorY int
clickSfx *sound.SoundEffect
waitForLeftMouseUp bool
}
// CreateManager creates a new instance of a UI manager
func CreateManager(fileProvider common.FileProvider, soundManager sound.Manager) *Manager {
result := &Manager{
pressedIndex: -1,
widgets: make([]Widget, 0),
cursorSprite: fileProvider.LoadSprite(resourcepaths.CursorDefault, palettedefs.Units),
clickSfx: soundManager.LoadSoundEffect(resourcepaths.SFXButtonClick),
waitForLeftMouseUp: false,
}
return result
}
// Reset resets the state of the UI manager. Typically called for new scenes
func (v *Manager) Reset() {
v.widgets = make([]Widget, 0)
v.pressedIndex = -1
v.waitForLeftMouseUp = true
}
// AddWidget adds a widget to the UI manager
func (v *Manager) AddWidget(widget Widget) {
v.widgets = append(v.widgets, widget)
}
func (v *Manager) WaitForMouseRelease() {
v.waitForLeftMouseUp = true
}
// Draw renders all of the UI elements
func (v *Manager) Draw(screen *ebiten.Image) {
for _, widget := range v.widgets {
if !widget.GetVisible() {
continue
}
widget.Draw(screen)
}
cx, cy := ebiten.CursorPosition()
v.cursorSprite.MoveTo(cx, cy)
v.cursorSprite.Draw(screen)
}
// Update updates all of the UI elements
func (v *Manager) Update() {
v.cursorButtons = 0
if ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
if !v.waitForLeftMouseUp {
v.cursorButtons |= CursorButtonLeft
}
} else {
if v.waitForLeftMouseUp {
v.waitForLeftMouseUp = false
}
}
if ebiten.IsMouseButtonPressed(ebiten.MouseButtonRight) {
v.cursorButtons |= CursorButtonRight
}
v.CursorX, v.CursorY = ebiten.CursorPosition()
if v.CursorButtonPressed(CursorButtonLeft) {
found := false
for i, widget := range v.widgets {
if !widget.GetVisible() || !widget.GetEnabled() {
continue
}
wx, wy := widget.GetLocation()
ww, wh := widget.GetSize()
if v.CursorX >= wx && v.CursorX <= wx+int(ww) && v.CursorY >= wy && v.CursorY <= wy+int(wh) {
widget.SetPressed(true)
if v.pressedIndex == -1 {
found = true
v.pressedIndex = i
v.clickSfx.Play()
} else if v.pressedIndex > -1 && v.pressedIndex != i {
v.widgets[i].SetPressed(false)
} else {
found = true
}
} else {
widget.SetPressed(false)
}
}
if !found {
if v.pressedIndex > -1 {
v.widgets[v.pressedIndex].SetPressed(false)
} else {
v.pressedIndex = -2
}
}
} else {
if v.pressedIndex > -1 {
widget := v.widgets[v.pressedIndex]
wx, wy := widget.GetLocation()
ww, wh := widget.GetSize()
if v.CursorX >= wx && v.CursorX <= wx+int(ww) && v.CursorY >= wy && v.CursorY <= wy+int(wh) {
widget.Activate()
}
} else {
for _, widget := range v.widgets {
if !widget.GetVisible() || !widget.GetEnabled() {
continue
}
widget.SetPressed(false)
}
}
v.pressedIndex = -1
}
}
// CursorButtonPressed determines if the specified button has been pressed
func (v *Manager) CursorButtonPressed(button CursorButton) bool {
return v.cursorButtons&button > 0
}
func (v *Manager) KeyPressed(key ebiten.Key) bool {
return ebiten.IsKeyPressed(key)
}