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package ui
import (
coreobjects "github.com/DegustatorPonos/RuinesOfRafdolon/CoreObjects"
settings "github.com/DegustatorPonos/RuinesOfRafdolon/Settings"
rl "github.com/gen2brain/raylib-go/raylib"
)
// Scene implimetation that contains aligned UI elements
type Menu struct {
manager *coreobjects.SceneManager
// The space between the window border and the grid. Measured in fractions of a screen. [0; 1]
PaddingX float32
// The space between the window border and the grid. Measured in fractions of a screen. [0; 1]
PaddingY float32
// Spaces between the rows
Spacing float32
// A horizontal line of elements
Rows []*GridRow
cache *layoutCache
}
// The pixel scalin
type layoutCache struct {
// The resolution the cache was calculated for
ScreenResolution rl.Vector2
// Horizontal offset in pixels
OffsetX float32
// Vertical offset in pixels
OffsetY float32
// The Y size of a row
Width float32
// The horizontal start and end of each row.
// Index of an array is representive with row index
RowLocations []rl.Vector2
}
func (base *layoutCache) CalculateOffsets(paddingX float32, paddingY float32) {
base.OffsetX = (base.ScreenResolution.X * paddingX)
base.OffsetY = (base.ScreenResolution.Y * paddingY)
base.Width = base.ScreenResolution.X - base.OffsetX * 2
}
func (base *layoutCache) CalculateRowsLocations (rows []*GridRow, WeightToPixels float32, spacing float32) {
var spacingPixels = (base.ScreenResolution.Y * spacing)
base.RowLocations = make([]rl.Vector2, len(rows))
var y float32 = base.OffsetY
for i, v := range rows {
var rowHeight = (WeightToPixels * v.HeightWeight)
base.RowLocations[i] = rl.Vector2 {
X: y,
Y: rowHeight,
}
y += rowHeight + spacingPixels
}
}
func (base *Menu) Create(manager *coreobjects.SceneManager) {
base.manager = manager
base.cache = &layoutCache{}
base.generateLayout()
for _, v := range base.Rows {
v.Init(base)
}
}
func (base *Menu) Destroy() {
}
func (base *Menu) Update() {
}
func (base *Menu) Draw() {
rl.ClearBackground(rl.Black)
base.generateLayout()
if settings.State.DrawColliders {
base.drawPaddings()
}
for i, v := range base.Rows {
var verticalSpacing = base.cache.RowLocations[i]
v.Draw(rl.Rectangle{
X: base.cache.OffsetX,
Y: verticalSpacing.X,
Width: base.cache.Width,
Height: verticalSpacing.Y,
})
}
}
func (base *Menu) drawPaddings() {
// Horizontal
rl.DrawRectangle(0, 0,
int32(base.cache.ScreenResolution.X),
int32(base.cache.OffsetY),
rl.Red)
rl.DrawRectangle(0,
int32(base.cache.ScreenResolution.Y) - int32(base.cache.OffsetY),
int32(base.cache.ScreenResolution.X),
int32(base.cache.OffsetY),
rl.Red)
// Vertical
rl.DrawRectangle(0,
int32(base.cache.OffsetY),
int32(base.cache.OffsetX),
int32(base.cache.ScreenResolution.Y - base.cache.OffsetY * 2),
rl.Blue)
rl.DrawRectangle(
int32(base.cache.ScreenResolution.X - base.cache.OffsetX),
int32(base.cache.OffsetY),
int32(base.cache.OffsetX),
int32(base.cache.ScreenResolution.Y - base.cache.OffsetY * 2),
rl.Blue)
}
// Generates all the offsets and scales for the rendering
func (base *Menu) generateLayout() {
if rl.GetScreenWidth() == int(base.cache.ScreenResolution.X) &&
rl.GetScreenHeight() == int(base.cache.ScreenResolution.Y) {
return
}
base.cache.ScreenResolution = rl.Vector2{
X: float32(rl.GetScreenWidth()),
Y: float32(rl.GetScreenHeight()),
}
base.cache.CalculateOffsets(base.PaddingX, base.PaddingY)
var weightToScale = base.getWeightToPixelRatio()
base.cache.CalculateRowsLocations(base.Rows, weightToScale, base.Spacing)
}
// Sums up all the weights
func (base *Menu) getWeightToPixelRatio() float32 {
var rowsAmount = len(base.Rows)
var sum float32 = 0
for _, v := range base.Rows {
sum += v.HeightWeight
}
var spacingPixels = base.cache.ScreenResolution.Y * base.Spacing
var spacing = float32(rowsAmount - 1) * spacingPixels
if spacing < 0 {
spacing = 0
}
return (base.cache.ScreenResolution.Y - 2 * base.cache.OffsetY - spacing) / sum
}
func (base *Menu) GetMousePosition() rl.Vector2 {
return rl.GetMousePosition()
}
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