doodle/pkg/editor_ui_doodad.go

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package doodle
// XXX REFACTOR XXX
// This function only uses EditorUI and not Doodle and is a candidate for
// refactor into a subpackage if EditorUI itself can ever be decoupled.
import (
"fmt"
"git.kirsle.net/apps/doodle/lib/render"
"git.kirsle.net/apps/doodle/lib/ui"
"git.kirsle.net/apps/doodle/pkg/balance"
"git.kirsle.net/apps/doodle/pkg/doodads"
"git.kirsle.net/apps/doodle/pkg/log"
"git.kirsle.net/apps/doodle/pkg/uix"
)
// DraggableActor is a Doodad being dragged from the Doodad palette.
type DraggableActor struct {
canvas *uix.Canvas
doodad *doodads.Doodad
}
// startDragActor begins the drag event for a Doodad onto a level.
func (u *EditorUI) startDragActor(doodad *doodads.Doodad) {
u.Supervisor.DragStart()
// Create the canvas to render on the mouse cursor.
drawing := uix.NewCanvas(doodad.Layers[0].Chunker.Size, false)
drawing.LoadDoodad(doodad)
drawing.Resize(doodad.Rect())
drawing.SetBackground(render.RGBA(0, 0, 1, 0)) // TODO: invisible becomes white
drawing.MaskColor = balance.DragColor // blueprint effect
u.DraggableActor = &DraggableActor{
canvas: drawing,
doodad: doodad,
}
}
// setupDoodadFrame configures the Doodad Palette tab for Edit Mode.
// This is a subroutine of editor_ui.go#SetupPalette()
//
// Can return an error if userdir.ListDoodads() returns an error (like directory
// not found), but it will *ALWAYS* return a valid ui.Frame -- it will just be
// empty and uninitialized.
func (u *EditorUI) setupDoodadFrame(e render.Engine, window *ui.Window) (*ui.Frame, error) {
var (
frame = ui.NewFrame("Doodad Tab")
perRow = balance.UIDoodadsPerRow
)
doodadsAvailable, err := doodads.ListDoodads()
if err != nil {
return frame, fmt.Errorf(
"setupDoodadFrame: doodads.ListDoodads: %s",
err,
)
}
var buttonSize = (paletteWidth - window.BoxThickness(2)) / int32(perRow)
// Draw the doodad buttons in a grid `perRow` buttons wide.
var (
row *ui.Frame
rowCount int // for labeling the ui.Frame for each row
)
for i, filename := range doodadsAvailable {
if row == nil || i%perRow == 0 {
rowCount++
row = ui.NewFrame(fmt.Sprintf("Doodad Row %d", rowCount))
row.SetBackground(balance.WindowBackground)
frame.Pack(row, ui.Pack{
Anchor: ui.N,
Fill: true,
})
}
func(filename string) {
doodad, err := doodads.LoadFile(filename)
if err != nil {
log.Error(err.Error())
doodad = doodads.New(balance.DoodadSize)
}
can := uix.NewCanvas(int(buttonSize), true)
can.Name = filename
can.SetBackground(render.White)
can.LoadDoodad(doodad)
btn := ui.NewButton(filename, can)
btn.Resize(render.NewRect(
buttonSize-2, // TODO: without the -2 the button border
buttonSize-2, // rests on top of the window border.
))
row.Pack(btn, ui.Pack{
Anchor: ui.W,
})
// Begin the drag event to grab this Doodad.
// NOTE: The drag target is the EditorUI.Canvas in
// editor_ui.go#SetupCanvas()
btn.Handle(ui.MouseDown, func(e render.Point) {
u.startDragActor(doodad)
})
u.Supervisor.Add(btn)
// Resize the canvas to fill the button interior.
btnSize := btn.Size()
can.Resize(render.NewRect(
btnSize.W-btn.BoxThickness(2),
btnSize.H-btn.BoxThickness(2),
),
)
btn.Compute(e)
}(filename)
}
return frame, nil
}