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using System;
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using System.Diagnostics;
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using System.Collections.Generic;
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namespace Assistance {
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public class InputModifierAssistants: InputManager.Modifier {
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public readonly Workarea workarea;
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public readonly List<guideline> shownGuidelines = new List<guideline>();</guideline></guideline>
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public InputModifierAssistants(Workarea workarea)
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{ this.workarea = workarea; }
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public class Modifier: Track.Modifier {
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public Modifier(Track.Handler handler):
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base(handler) { }
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public InputManager.KeyPoint.Holder holder = null;
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public List<guideline> guidelines = new List<guideline>();</guideline></guideline>
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public override Track.Point calcPoint(double originalIndex) {
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Track.Point p = base.calcPoint(originalIndex);
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return guidelines.Count > 0 ? guidelines[0].transformPoint(p) : p;
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}
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}
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public override void modify(Track track, InputManager.KeyPoint keyPoint, List<track> outTracks) {
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Track subTrack;
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Modifier modifier;
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if (track.handler == null) {
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if (track.isEmpty)
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return;
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track.handler = new Track.Handler(this, track);
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modifier = new Modifier(track.handler);
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workarea.getGuidelines(modifier.guidelines, track.getFirst().position);
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subTrack = new Track(modifier);
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track.handler.tracks.Add(subTrack);
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if (modifier.guidelines.Count > 1) {
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modifier.holder = keyPoint.hold();
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outTracks.Add(subTrack);
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return;
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}
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}
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subTrack = track.handler.tracks[0];
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modifier = (Modifier)subTrack.modifier;
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outTracks.Add(subTrack);
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if (!track.wasChanged)
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return;
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// remove points
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int start = track.count - track.pointsAdded;
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if (start < 0) start = 0;
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subTrack.truncate(start);
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bool trackIsLong = !track.isEmpty && (track.getLast().length >= Guideline.maxLenght || track.isFinished());
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if (!trackIsLong && modifier.holder != null && !modifier.holder.isHolded && modifier.holder.available)
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modifier.holder.reuse();
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// select guideline
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if (modifier.holder != null && modifier.holder.isHolded) {
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Guideline guideline = Guideline.findBest(modifier.guidelines, track);
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if (guideline != null && guideline != modifier.guidelines[0]) {
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modifier.guidelines[ modifier.guidelines.IndexOf(guideline) ] = modifier.guidelines[0];
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modifier.guidelines[0] = guideline;
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start = 0;
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subTrack.truncate(0);
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}
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if (trackIsLong)
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modifier.holder.release();
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}
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// add points
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for(int i = start; i < track.count; ++i) {
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double di = (double)i;
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Track.Point p = modifier.calcPoint(di);
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subTrack.add(p);
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}
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track.resetCounters();
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}
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public override void drawHover(Cairo.Context context, Point hover) {
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workarea.getGuidelines(shownGuidelines, hover);
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foreach(Guideline guideline in shownGuidelines)
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guideline.draw(context);
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shownGuidelines.Clear();
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}
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public override void drawTrack(Cairo.Context context, Track track) {
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if (track.handler == null) return;
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Track subTrack = track.handler.tracks[0];
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if (!subTrack.isEmpty)
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drawHover(context, subTrack.getLast().position);
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}
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}
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}
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