649 lines
19 KiB
Go
649 lines
19 KiB
Go
package uix
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import (
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"git.kirsle.net/SketchyMaze/doodle/pkg/balance"
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"git.kirsle.net/SketchyMaze/doodle/pkg/drawtool"
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"git.kirsle.net/SketchyMaze/doodle/pkg/keybind"
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"git.kirsle.net/SketchyMaze/doodle/pkg/level"
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"git.kirsle.net/SketchyMaze/doodle/pkg/log"
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"git.kirsle.net/SketchyMaze/doodle/pkg/shmem"
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"git.kirsle.net/go/render"
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"git.kirsle.net/go/render/event"
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"git.kirsle.net/go/ui"
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)
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// Modified returns whether the canvas has been modified since it was last
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// loaded. Methods like Load and LoadFile will set modified to false, and
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// commitStroke sets it to true.
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func (w *Canvas) Modified() bool {
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return w.modified
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}
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// SetModified sets the modified bit on the canvas.
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func (w *Canvas) SetModified(v bool) {
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w.modified = v
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}
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// commitStroke is the common function that applies a stroke the user is
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// actively drawing onto the canvas. This is for Edit Mode.
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func (w *Canvas) commitStroke(tool drawtool.Tool, addHistory bool) {
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if w.currentStroke == nil {
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// nothing to commit
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return
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}
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// Zoom the stroke coordinates (this modifies the pointer).
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// Note: all the points on the stroke were mouse cursor coordinates on the screen.
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w.currentStroke = w.ZoomStroke(w.currentStroke)
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// Mark the canvas as modified.
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w.modified = true
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var (
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deleting = w.currentStroke.Shape == drawtool.Eraser
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dedupe = map[render.Point]interface{}{} // don't revisit the same point twice
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// Helper functions to set pixels on the level while storing the original
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// value of any pixel being replaced.
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set = func(pt render.Point, sw *level.Swatch) {
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// Take note of what pixel was originally here before we change it.
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if swatch, err := w.chunks.Get(pt); err == nil {
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if _, ok := dedupe[pt]; !ok {
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w.currentStroke.OriginalPoints[pt] = swatch
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dedupe[pt] = nil
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}
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}
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if deleting {
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w.chunks.Delete(pt)
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} else if sw != nil {
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w.chunks.Set(pt, sw)
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} else {
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panic("Canvas.commitStroke.set: current stroke has no level.Swatch in ExtraData")
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}
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}
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// Rects: read existing pixels first, then write new pixels
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readRect = func(rect render.Rect) {
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for pt := range w.chunks.IterViewport(rect) {
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point := pt.Point()
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if _, ok := dedupe[point]; !ok {
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w.currentStroke.OriginalPoints[pt.Point()] = pt.Swatch
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dedupe[point] = nil
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}
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}
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}
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setRect = func(rect render.Rect, sw *level.Swatch) {
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if deleting {
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w.chunks.DeleteRect(rect)
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} else if sw != nil {
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w.chunks.SetRect(rect, sw)
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} else {
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panic("Canvas.commitStroke.setRect: current stroke has no level.Swatch in ExtraData")
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}
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}
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)
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var swatch *level.Swatch
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if v, ok := w.currentStroke.ExtraData.(*level.Swatch); ok {
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swatch = v
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}
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if w.currentStroke.Thickness > 0 {
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// Eraser Tool only: record which pixels will be blown away by this.
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// This is SLOW for thick (rect-based) lines, but eraser tool must have it.
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if deleting {
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for rect := range w.currentStroke.IterThickPoints() {
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readRect(rect)
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}
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}
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for rect := range w.currentStroke.IterThickPoints() {
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setRect(rect, swatch)
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}
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} else {
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for pt := range w.currentStroke.IterPoints() {
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// note: set already records the original pixel if changing it.
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set(pt, swatch)
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}
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}
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// Add the stroke to level history.
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if addHistory {
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w.strokeToHistory(w.currentStroke)
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}
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w.RemoveStroke(w.currentStroke)
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w.currentStroke = nil
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w.lastPixel = nil
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}
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// Add a recently drawn stroke to the UndoHistory.
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func (w *Canvas) strokeToHistory(stroke *drawtool.Stroke) {
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if w.level != nil {
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w.level.UndoHistory.AddStroke(stroke)
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} else if w.doodad != nil {
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if w.doodad.UndoHistory == nil {
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// HACK: if UndoHistory was not initialized properly.
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w.doodad.UndoHistory = drawtool.NewHistory(balance.UndoHistory)
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}
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w.doodad.UndoHistory.AddStroke(stroke)
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}
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}
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// loopEditable handles the Loop() part for editable canvases.
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func (w *Canvas) loopEditable(ev *event.State) error {
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// Get the absolute position of the canvas on screen to accurately match
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// it up to mouse clicks.
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var (
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P = ui.AbsolutePosition(w)
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cursor = render.Point{
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X: ev.CursorX - P.X - w.Scroll.X,
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Y: ev.CursorY - P.Y - w.Scroll.Y,
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}
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)
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// If the actual cursor is not over the actual Canvas UI element, don't
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// pay any attention to clicks. I added this when I saw you were able to
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// accidentally draw (with large brush size) when clicking on the Palette
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// panel and not the drawing itself.
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if !w.IsCursorOver() {
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return nil
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}
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switch w.Tool {
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case drawtool.PanTool:
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// Pan tool = click to pan the level.
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var delta render.Point
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if keybind.LeftClick(ev) || keybind.MiddleClick(ev) {
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if !w.scrollDragging {
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w.scrollDragging = true
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w.scrollStartAt = shmem.Cursor
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w.scrollWasAt = w.Scroll
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} else {
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delta = shmem.Cursor.Compare(w.scrollStartAt)
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w.Scroll = w.scrollWasAt
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w.Scroll.Subtract(delta)
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// TODO: if I don't call this, the user is able to (temporarily!)
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// pan outside the level boundaries before it snaps-back when they
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// release. But the normal middle-click to pan code doesn't let
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// them do this.. investigate why later.
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w.loopConstrainScroll()
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}
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} else {
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if w.scrollDragging {
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w.scrollDragging = false
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}
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}
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// All the Pan tool to still interact with the Settings button on mouse-over
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// of an actor. On touch devices it's difficult to access an actor's settings
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// without accidentally dragging the actor, so the Pan Tool allows safe access.
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// NOTE: code copied from Actor Tool but with delete and drag/drop hooks removed.
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var WP = w.WorldIndexAt(cursor)
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for _, actor := range w.actors {
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// Compute the bounding box on screen where this doodad
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// visually appears.
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var scrollBias = render.Point{
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X: w.Scroll.X,
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Y: w.Scroll.Y,
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}
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if w.Zoom != 0 {
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scrollBias.X = w.ZoomDivide(scrollBias.X)
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scrollBias.Y = w.ZoomDivide(scrollBias.Y)
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}
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box := render.Rect{
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X: actor.Actor.Point.X - scrollBias.X - w.ZoomDivide(P.X),
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Y: actor.Actor.Point.Y - scrollBias.Y - w.ZoomDivide(P.Y),
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W: actor.Canvas.Size().W,
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H: actor.Canvas.Size().H,
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}
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// Mouse hover?
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if WP.Inside(box) {
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actor.Canvas.Configure(ui.Config{
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BorderSize: 1,
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BorderColor: render.RGBA(153, 153, 153, 255),
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BorderStyle: ui.BorderSolid,
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Background: render.White, // TODO: cuz the border draws a bgcolor
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})
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// Show doodad buttons.
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actor.Canvas.ShowDoodadButtons = true
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// Check for a mouse down event to begin dragging this
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// canvas around.
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if keybind.LeftClick(ev) && delta == render.Origin {
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// Did they click onto the doodad buttons?
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if shmem.Cursor.Inside(actor.Canvas.doodadButtonRect()) {
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keybind.ClearLeftClick(ev)
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if w.OnDoodadConfig != nil {
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w.OnDoodadConfig(actor)
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} else {
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log.Error("OnDoodadConfig: handler not defined for parent canvas")
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}
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return nil
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}
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break
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}
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} else {
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actor.Canvas.SetBorderSize(0)
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actor.Canvas.SetBackground(render.RGBA(0, 0, 1, 0)) // TODO
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actor.Canvas.ShowDoodadButtons = false
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}
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}
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case drawtool.PencilTool:
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// If no swatch is active, do nothing with mouse clicks.
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if w.Palette.ActiveSwatch == nil {
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return nil
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}
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// Clicking? Log all the pixels while doing so.
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if keybind.LeftClick(ev) {
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// Initialize a new Stroke for this atomic drawing operation?
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if w.currentStroke == nil {
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w.currentStroke = drawtool.NewStroke(drawtool.Freehand, w.Palette.ActiveSwatch.Color)
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w.currentStroke.Pattern = w.Palette.ActiveSwatch.Pattern
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w.currentStroke.Thickness = w.BrushSize
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w.currentStroke.ExtraData = w.Palette.ActiveSwatch
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w.AddStroke(w.currentStroke)
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}
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lastPixel := w.lastPixel
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pixel := &level.Pixel{
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X: cursor.X,
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Y: cursor.Y,
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Swatch: w.Palette.ActiveSwatch,
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}
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// If the user is holding the mouse down over one spot and not
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// moving, don't do anything. The pixel has already been set and
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// needless writes to the map cause needless cache rewrites etc.
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if lastPixel != nil {
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if pixel.X == lastPixel.X && pixel.Y == lastPixel.Y {
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break
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}
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}
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// Append unique new pixels.
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if lastPixel != nil || lastPixel != pixel {
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// Draw the pixels in between.
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if lastPixel != nil && lastPixel != pixel {
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for point := range render.IterLine(lastPixel.Point(), pixel.Point()) {
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w.currentStroke.AddPoint(point)
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}
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}
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w.lastPixel = pixel
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// Save the pixel in the current stroke.
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w.currentStroke.AddPoint(render.Point{
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X: cursor.X,
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Y: cursor.Y,
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})
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}
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} else {
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w.commitStroke(w.Tool, true)
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}
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case drawtool.LineTool:
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// If no swatch is active, do nothing with mouse clicks.
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if w.Palette.ActiveSwatch == nil {
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return nil
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}
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// Clicking? Log all the pixels while doing so.
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if keybind.LeftClick(ev) {
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// Initialize a new Stroke for this atomic drawing operation?
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if w.currentStroke == nil {
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w.currentStroke = drawtool.NewStroke(drawtool.Line, w.Palette.ActiveSwatch.Color)
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w.currentStroke.Pattern = w.Palette.ActiveSwatch.Pattern
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w.currentStroke.Thickness = w.BrushSize
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w.currentStroke.ExtraData = w.Palette.ActiveSwatch
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w.currentStroke.PointA = render.NewPoint(cursor.X, cursor.Y)
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w.AddStroke(w.currentStroke)
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}
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w.currentStroke.PointB = render.NewPoint(cursor.X, cursor.Y)
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} else {
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w.commitStroke(w.Tool, true)
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}
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case drawtool.RectTool:
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// If no swatch is active, do nothing with mouse clicks.
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if w.Palette.ActiveSwatch == nil {
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return nil
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}
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// Clicking? Log all the pixels while doing so.
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if keybind.LeftClick(ev) {
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// Initialize a new Stroke for this atomic drawing operation?
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if w.currentStroke == nil {
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w.currentStroke = drawtool.NewStroke(drawtool.Rectangle, w.Palette.ActiveSwatch.Color)
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w.currentStroke.Pattern = w.Palette.ActiveSwatch.Pattern
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w.currentStroke.Thickness = w.BrushSize
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w.currentStroke.ExtraData = w.Palette.ActiveSwatch
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w.currentStroke.PointA = render.NewPoint(cursor.X, cursor.Y)
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w.AddStroke(w.currentStroke)
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}
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w.currentStroke.PointB = render.NewPoint(cursor.X, cursor.Y)
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} else {
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w.commitStroke(w.Tool, true)
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}
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case drawtool.EllipseTool:
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if w.Palette.ActiveSwatch == nil {
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return nil
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}
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if keybind.LeftClick(ev) {
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if w.currentStroke == nil {
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w.currentStroke = drawtool.NewStroke(drawtool.Ellipse, w.Palette.ActiveSwatch.Color)
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w.currentStroke.Pattern = w.Palette.ActiveSwatch.Pattern
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w.currentStroke.Thickness = w.BrushSize
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w.currentStroke.ExtraData = w.Palette.ActiveSwatch
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w.currentStroke.PointA = render.NewPoint(cursor.X, cursor.Y)
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w.AddStroke(w.currentStroke)
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}
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w.currentStroke.PointB = render.NewPoint(cursor.X, cursor.Y)
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} else {
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w.commitStroke(w.Tool, true)
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}
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case drawtool.TextTool:
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// The Text Tool popup should initialize this for us, if somehow not
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// initialized skip this tool processing.
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if w.Palette.ActiveSwatch == nil || drawtool.TT.IsZero() {
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return nil
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}
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// Do we need to create the Label?
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if drawtool.TT.Label == nil {
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drawtool.TT.Label = ui.NewLabel(ui.Label{
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Text: drawtool.TT.Message,
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Font: render.Text{
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FontFilename: drawtool.TT.Font,
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Size: drawtool.TT.Size,
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Color: w.Palette.ActiveSwatch.Color,
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},
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})
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}
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// Do we need to update the color of the label?
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if drawtool.TT.Label.Font.Color != w.Palette.ActiveSwatch.Color {
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drawtool.TT.Label.Font.Color = w.Palette.ActiveSwatch.Color
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}
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// NOTE: Canvas.presentStrokes() will handle drawing the font preview
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// at the cursor location while the TextTool is active.
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// On mouse click, commit the text to the drawing.
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if keybind.LeftClick(ev) {
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if stroke, err := drawtool.TT.ToStroke(shmem.CurrentRenderEngine, w.Palette.ActiveSwatch.Color, cursor); err != nil {
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shmem.FlashError("Text Tool error: %s", err)
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return nil
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} else {
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w.currentStroke = stroke
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w.currentStroke.ExtraData = w.Palette.ActiveSwatch
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w.commitStroke(drawtool.PencilTool, true)
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}
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keybind.ClearLeftClick(ev)
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}
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case drawtool.FloodTool:
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if w.Palette.ActiveSwatch == nil {
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return nil
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}
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// Click to activate.
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if keybind.LeftClick(ev) {
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var (
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chunker = w.Chunker()
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stroke = drawtool.NewStroke(drawtool.Freehand, w.Palette.ActiveSwatch.Color)
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)
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// Set some max boundaries to prevent runaway infinite loops, e.g. if user
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// clicked the wide open void the flood fill would never finish!
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limit := balance.FloodToolLimit
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// Get the original color at this location.
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// Error cases can include: no chunk at this spot, or no pixel at this spot.
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// Treat these as just a null color and proceed anyway, user should be able
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// to flood fill blank areas of their level.
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baseColor, err := chunker.Get(cursor)
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if err != nil {
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limit = balance.FloodToolVoidLimit
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log.Warn("FloodTool: couldn't get base color at %s: %s (got %s)", cursor, err)
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}
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// If no change, do nothing.
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if baseColor == w.Palette.ActiveSwatch {
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break
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}
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// The flood fill algorithm.
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queue := []render.Point{cursor}
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for len(queue) > 0 {
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node := queue[0]
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queue = queue[1:]
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colorAt, _ := chunker.Get(node)
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if colorAt != baseColor {
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continue
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}
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// For Undo history, store the original color at this point.
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if colorAt != nil {
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stroke.OriginalPoints[node] = colorAt
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}
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// Add the neighboring pixels.
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for _, neighbor := range []render.Point{
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{X: node.X - 1, Y: node.Y},
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{X: node.X + 1, Y: node.Y},
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{X: node.X, Y: node.Y - 1},
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{X: node.X, Y: node.Y + 1},
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} {
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// Only if not too far from the origin!
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if render.AbsInt(neighbor.X-cursor.X) <= limit && render.AbsInt(neighbor.Y-cursor.Y) <= limit {
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queue = append(queue, neighbor)
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}
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}
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stroke.AddPoint(node)
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err = chunker.Set(node, w.Palette.ActiveSwatch)
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if err != nil {
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log.Error("FloodTool: error setting %s to %s: %s", node, w.Palette.ActiveSwatch, err)
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}
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}
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w.strokeToHistory(stroke)
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keybind.ClearLeftClick(ev)
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}
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case drawtool.EraserTool:
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// Clicking? Log all the pixels while doing so.
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if keybind.LeftClick(ev) {
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// Initialize a new Stroke for this atomic drawing operation?
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if w.currentStroke == nil {
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// The color is white, will look like white-out that covers the
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// wallpaper during the stroke.
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w.currentStroke = drawtool.NewStroke(drawtool.Eraser, render.White)
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w.currentStroke.Thickness = w.BrushSize
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w.AddStroke(w.currentStroke)
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}
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lastPixel := w.lastPixel
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pixel := &level.Pixel{
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X: cursor.X,
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Y: cursor.Y,
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Swatch: w.Palette.ActiveSwatch,
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}
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// If the user is holding the mouse down over one spot and not
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// moving, don't do anything. The pixel has already been set and
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// needless writes to the map cause needless cache rewrites etc.
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if lastPixel != nil {
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if pixel.X == lastPixel.X && pixel.Y == lastPixel.Y {
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break
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}
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}
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// Append unique new pixels.
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if lastPixel == nil || lastPixel != pixel {
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if lastPixel != nil && lastPixel != pixel {
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for point := range render.IterLine(lastPixel.Point(), pixel.Point()) {
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w.currentStroke.AddPoint(point)
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}
|
|
}
|
|
|
|
w.lastPixel = pixel
|
|
w.currentStroke.AddPoint(render.Point{
|
|
X: cursor.X,
|
|
Y: cursor.Y,
|
|
})
|
|
}
|
|
} else {
|
|
w.commitStroke(w.Tool, true)
|
|
}
|
|
|
|
case drawtool.ActorTool:
|
|
// See if any of the actors are below the mouse cursor.
|
|
var WP = w.WorldIndexAt(cursor)
|
|
|
|
var deleteActors = []*Actor{}
|
|
for _, actor := range w.actors {
|
|
|
|
// Compute the bounding box on screen where this doodad
|
|
// visually appears.
|
|
var scrollBias = render.Point{
|
|
X: w.Scroll.X,
|
|
Y: w.Scroll.Y,
|
|
}
|
|
if w.Zoom != 0 {
|
|
scrollBias.X = w.ZoomDivide(scrollBias.X)
|
|
scrollBias.Y = w.ZoomDivide(scrollBias.Y)
|
|
}
|
|
box := render.Rect{
|
|
X: actor.Actor.Point.X - scrollBias.X - w.ZoomDivide(P.X),
|
|
Y: actor.Actor.Point.Y - scrollBias.Y - w.ZoomDivide(P.Y),
|
|
W: actor.Canvas.Size().W,
|
|
H: actor.Canvas.Size().H,
|
|
}
|
|
|
|
// Mouse hover?
|
|
if WP.Inside(box) {
|
|
actor.Canvas.Configure(ui.Config{
|
|
BorderSize: 1,
|
|
BorderColor: render.RGBA(255, 153, 0, 255),
|
|
BorderStyle: ui.BorderSolid,
|
|
Background: render.White, // TODO: cuz the border draws a bgcolor
|
|
})
|
|
|
|
// Show doodad buttons.
|
|
actor.Canvas.ShowDoodadButtons = true
|
|
|
|
// Check for a mouse down event to begin dragging this
|
|
// canvas around.
|
|
if keybind.LeftClick(ev) {
|
|
// Did they click onto the doodad buttons?
|
|
if shmem.Cursor.Inside(actor.Canvas.doodadButtonRect()) {
|
|
keybind.ClearLeftClick(ev)
|
|
if w.OnDoodadConfig != nil {
|
|
w.OnDoodadConfig(actor)
|
|
} else {
|
|
log.Error("OnDoodadConfig: handler not defined for parent canvas")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Pop this canvas out for the drag/drop.
|
|
if w.OnDragStart != nil {
|
|
deleteActors = append(deleteActors, actor)
|
|
w.OnDragStart(actor.Actor)
|
|
}
|
|
break
|
|
} else if ev.Button3 {
|
|
// Right click to delete an actor.
|
|
deleteActors = append(deleteActors, actor)
|
|
}
|
|
} else {
|
|
actor.Canvas.SetBorderSize(0)
|
|
actor.Canvas.SetBackground(render.RGBA(0, 0, 1, 0)) // TODO
|
|
actor.Canvas.ShowDoodadButtons = false
|
|
}
|
|
}
|
|
|
|
// Change in actor count?
|
|
if len(deleteActors) > 0 && w.OnDeleteActors != nil {
|
|
w.OnDeleteActors(deleteActors)
|
|
}
|
|
|
|
case drawtool.LinkTool:
|
|
// See if any of the actors are below the mouse cursor.
|
|
var WP = w.WorldIndexAt(cursor)
|
|
|
|
for _, actor := range w.actors {
|
|
// Compute the bounding box on screen where this doodad
|
|
// visually appears.
|
|
var scrollBias = render.Point{
|
|
X: w.Scroll.X,
|
|
Y: w.Scroll.Y,
|
|
}
|
|
if w.Zoom != 0 {
|
|
scrollBias.X = w.ZoomDivide(scrollBias.X)
|
|
scrollBias.Y = w.ZoomDivide(scrollBias.Y)
|
|
}
|
|
box := render.Rect{
|
|
X: actor.Actor.Point.X - scrollBias.X - w.ZoomDivide(P.X),
|
|
Y: actor.Actor.Point.Y - scrollBias.Y - w.ZoomDivide(P.Y),
|
|
W: actor.Canvas.Size().W,
|
|
H: actor.Canvas.Size().H,
|
|
}
|
|
|
|
if WP.Inside(box) {
|
|
actor.Canvas.Configure(ui.Config{
|
|
BorderSize: 1,
|
|
BorderColor: render.RGBA(255, 153, 255, 255),
|
|
BorderStyle: ui.BorderSolid,
|
|
Background: render.White, // TODO: cuz the border draws a bgcolor
|
|
})
|
|
|
|
// Click handler to start linking this actor.
|
|
if keybind.LeftClick(ev) {
|
|
if err := w.LinkAdd(actor); err != nil {
|
|
return err
|
|
}
|
|
|
|
// TODO: reset the Button1 state so we don't finish a
|
|
// link and then LinkAdd the clicked doodad immediately
|
|
// (causing link chaining)
|
|
keybind.ClearLeftClick(ev)
|
|
break
|
|
}
|
|
} else {
|
|
actor.Canvas.SetBorderSize(0)
|
|
actor.Canvas.SetBackground(render.RGBA(0, 0, 1, 0)) // TODO
|
|
}
|
|
|
|
// Permanently color the actor if it's the current subject of the
|
|
// Link Tool (after 1st click, until 2nd click of other actor)
|
|
if w.linkFirst == actor {
|
|
actor.Canvas.Configure(ui.Config{
|
|
Background: render.RGBA(255, 153, 255, 153),
|
|
})
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
|
|
}
|