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-rw-r--r--src/canvastoolselections.cc319
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diff --git a/src/canvastoolselections.cc b/src/canvastoolselections.cc
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * canvastoolselections.cc
+ *
+ * Thu Jul 28 20:16:59 CEST 2011
+ * Copyright 2011 Bent Bisballe Nyeng
+ * deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ * This file is part of DrumGizmo.
+ *
+ * DrumGizmo is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * DrumGizmo is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with DrumGizmo; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+#include "canvastoolselections.h"
+
+#include <math.h>
+#include <stdio.h>
+
+#define mapX(x) canvas->mapX(x)
+#define mapY(x) canvas->mapY(x)
+#define unmapX(x) canvas->unmapX(x)
+#define unmapY(x) canvas->unmapY(x)
+
+CanvasToolSelections::CanvasToolSelections(Canvas *c, Selections &s,
+ Selections &p)
+ : selections(s), selections_preview(p)
+{
+ threshold = 0.5; // Default from CanvasToolThreshold
+ hold = 100;
+
+ canvas = c;
+
+ selection_is_moving_left = false;
+ selection_is_moving_right = false;
+
+ colSelBg = QColor(255, 0, 0, 60);
+ colSel = QColor(255, 0, 0, 160);
+ colActiveSelBg = QColor(255, 255, 0, 60);
+ colActiveSel = QColor(255, 255, 0, 160);
+ colPreviewSelBg = QColor(0, 0, 255, 60);
+ colPreviewSel = QColor(0, 0, 255, 160);
+}
+
+bool CanvasToolSelections::mouseMoveEvent(QMouseEvent *event)
+{
+ sel_id_t active_selection = selections.active();
+ Selection act_sel = selections.get(active_selection);
+
+ if(selection_is_moving_left) {
+ float val = unmapX(event->x());
+ if(val > act_sel.to) val = act_sel.to - 1;
+ act_sel.from = val;
+ selections.update(active_selection, act_sel);
+ canvas->update();
+ return true;
+ }
+
+ if(selection_is_moving_right) {
+ float val = unmapX(event->x());
+ if(val < act_sel.from) val = act_sel.from + 1;
+ act_sel.to = val;
+ selections.update(active_selection, act_sel);
+ canvas->update();
+ return true;
+ }
+
+ if(event->button() != Qt::LeftButton) {
+ // Check if a selection is being dragged.
+ QVector<sel_id_t> ids = selections.ids();
+ QVector<sel_id_t>::iterator i = ids.begin();
+ while(i != ids.end()) {
+ Selection sel = selections.get(*i);
+ if(abs(event->x() - mapX(sel.from)) < 2
+ || abs(event->x() - mapX(sel.to)) < 2) {
+ canvas->setCursor(Qt::SplitHCursor);
+ return true;
+ }
+ i++;
+ }
+ }
+
+ return false;
+}
+
+bool CanvasToolSelections::mousePressEvent(QMouseEvent *event)
+{
+ if(event->button() == Qt::LeftButton) {
+ // Check if a selection is being dragged.
+ QVector<sel_id_t> ids = selections.ids();
+ QVector<sel_id_t>::iterator i = ids.begin();
+ while(i != ids.end()) {
+ Selection sel = selections.get(*i);
+ if(abs(event->x() - mapX(sel.from)) < 2) {
+ selections.setActive(*i);
+ selection_is_moving_left = true;
+ return true;
+ }
+
+ if(abs(event->x() - mapX(sel.to)) < 2) {
+ selections.setActive(*i);
+ selection_is_moving_right = true;
+ return true;
+ }
+
+ i++;
+ }
+
+ // Check if a selection is being selected.
+ i = ids.begin();
+ while(i != ids.end()) {
+ Selection sel = selections.get(*i);
+ if(event->x() > mapX(sel.from) &&
+ event->x() < mapX(sel.to)) {
+ selections.setActive(*i);
+ canvas->update();
+ return true;
+ }
+
+ i++;
+ }
+
+ // Make new selection
+ int from = unmapX(event->x());
+ Selection new_selection(from, from);
+ sel_id_t id = selections.add(new_selection);
+ selections.setActive(id);
+ selection_is_moving_right = true;
+ canvas->update();
+ return true;
+ }
+
+ return false;
+}
+
+bool CanvasToolSelections::mouseReleaseEvent(QMouseEvent *event)
+{
+ if(event->button() == Qt::LeftButton) {
+ if(selection_is_moving_left || selection_is_moving_right) {
+ selection_is_moving_left = false;
+ selection_is_moving_right = false;
+ canvas->setCursor(Qt::ArrowCursor);
+ canvas->update();
+ return true;
+ }
+ }
+
+ return false;
+}
+
+void CanvasToolSelections::paintEvent(QPaintEvent *event, QPainter &painter)
+{
+ int pos = unmapX(event->rect().x());
+ int width = unmapX(event->rect().width());
+
+ {
+ QVector<sel_id_t> ids = selections.ids();
+ QVector<sel_id_t>::iterator i = ids.begin();
+ while(i != ids.end()) {
+ Selection sel = selections.get(*i);
+ int from = sel.from;
+ int to = sel.to;
+ int fadein = sel.fadein;
+ int fadeout = sel.fadeout;
+ if(from > pos + width || to + width < pos) { i++; continue; }
+ if(selections.active() == *i) {
+ painter.setBrush(colActiveSelBg);
+ painter.setPen(colActiveSel);
+ } else {
+ painter.setBrush(colSelBg);
+ painter.setPen(colSel);
+ }
+ painter.drawRect(mapX(from), mapY(-1.0),
+ mapX(to) - mapX(from), mapY(1.0) - mapY(-1.0));
+ painter.drawLine(mapX(from), mapY(0.0), mapX(from + fadein), mapY(-1.0));
+ painter.drawLine(mapX(from), mapY(0.0), mapX(from + fadein), mapY(1.0));
+ painter.drawLine(mapX(to - fadeout), mapY(-1.0), mapX(to), mapY(0.0));
+ painter.drawLine(mapX(to - fadeout), mapY(1.0), mapX(to), mapY(0.0));
+ i++;
+ }
+ }
+
+ if(show_preview) {
+ QVector<sel_id_t> ids = selections_preview.ids();
+ QVector<sel_id_t>::iterator i = ids.begin();
+ while(i != ids.end()) {
+ Selection sel = selections_preview.get(*i);
+ int from = sel.from;
+ int to = sel.to;
+ int fadein = sel.fadein;
+ int fadeout = sel.fadeout;
+ if(from > pos + width || to + width < pos) { i++; continue; }
+ painter.setBrush(colPreviewSelBg);
+ painter.setPen(colPreviewSel);
+
+ painter.drawRect(mapX(from), mapY(-1.0),
+ mapX(to) - mapX(from), mapY(1.0) - mapY(-1.0));
+ painter.drawLine(mapX(from), mapY(0.0), mapX(from + fadein), mapY(-1.0));
+ painter.drawLine(mapX(from), mapY(0.0), mapX(from + fadein), mapY(1.0));
+ painter.drawLine(mapX(to - fadeout), mapY(-1.0), mapX(to), mapY(0.0));
+ painter.drawLine(mapX(to - fadeout), mapY(1.0), mapX(to), mapY(0.0));
+ i++;
+ }
+ }
+}
+
+void CanvasToolSelections::keyReleaseEvent(QKeyEvent *event)
+{
+ if(selections.active() != SEL_NONE && event->key() == Qt::Key_Delete) {
+ selections.remove(selections.active());
+ canvas->update();
+ }
+}
+
+void CanvasToolSelections::thresholdChanged(double t)
+{
+ threshold = t;
+}
+
+void CanvasToolSelections::holdChanged(int h)
+{
+ hold = h;
+}
+
+void CanvasToolSelections::noiseFloorChanged(int t)
+{
+ double div = 666.0 / 0.00003;
+ noise_floor = (double)t/div;
+}
+
+void CanvasToolSelections::fadeoutChanged(int t)
+{
+ fadeout = (double)t/1000.0;
+}
+
+void CanvasToolSelections::autoCreateSelections()
+{
+ doAutoCreateSelections(false);
+}
+
+void CanvasToolSelections::autoCreateSelectionsPreview()
+{
+ doAutoCreateSelections(true);
+}
+
+void CanvasToolSelections::doAutoCreateSelections(bool preview)
+{
+ float *data = canvas->data;
+ size_t size = canvas->size;
+
+ if(preview) selections_preview.clear();
+
+ for(size_t i = 0; i < size; i++) {
+ if(fabs(data[i]) > fabs(threshold)) {
+ int from = i;
+
+ if(data[from] > 0.0) {
+ while(data[from] > data[from-1] // Falling
+ && data[from-1] > 0.0 // Not crossing zero
+ ) {
+ from--;
+ }
+ } else if(data[from] < 0.0) {
+ while(data[from] < data[from-1] // Rising
+ && data[from-1] < 0.0 // Not crossing zero
+ ) {
+ from--;
+ }
+ }
+
+ int to = i;
+ float runavg = fabs(data[from]);
+ while((runavg > noise_floor ||
+ to < from + hold) &&
+ to < (int)size) {
+ double p = 0.9;
+ runavg = runavg * p + fabs(data[to]) * (1 - p);
+ to++;
+ }
+
+ Selection s(from, to, 2, ((to - from) / 3) * fadeout);
+ if(preview) {
+ selections_preview.add(s);
+ } else {
+ selections.add(s);
+ }
+
+ i = to+1;
+ }
+ }
+ canvas->update();
+}
+
+void CanvasToolSelections::clearSelections()
+{
+ selections.clear();
+ selection_is_moving_left = false;
+ selection_is_moving_right = false;
+ canvas->setCursor(Qt::ArrowCursor);
+ canvas->update();
+}
+
+void CanvasToolSelections::setShowPreview(bool s)
+{
+ show_preview = s;
+ canvas->update();
+}
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