fix sample info overwrite; show loop points on preview

xybrid/config/colorscheme.h

@@ -25,6 +25,7 @@ namespace Xybrid::Config {
         QColor waveformBg = {23, 23, 23};
         QColor waveformBgHighlight = {31, 31, 47};
         QColor waveformFgPrimary = {191, 163, 255};
+        QColor waveformLoopPoints = {255, 127, 127};
     };
     extern ColorScheme colorScheme;
 }

xybrid/mainwindow.cpp

@@ -382,16 +382,19 @@ MainWindow::MainWindow(QWidget *parent) :
                     editingSample->loopStart = -1;
                     editingSample->loopEnd = -1;
                 }
+                ui->waveformPreview->update();
             }
         });
         connect(ui->spinSampleLoopStart, qOverload<int>(&QSpinBox::valueChanged), this, [this](int v) {
             if (editingSample && ui->groupSampleLoop->isChecked()) {
                 editingSample->loopStart = v;
+                ui->waveformPreview->update();
             }
         });
         connect(ui->spinSampleLoopEnd, qOverload<int>(&QSpinBox::valueChanged), this, [this](int v) {
             if (editingSample && ui->groupSampleLoop->isChecked()) {
                 editingSample->loopEnd = v;
+                ui->waveformPreview->update();
             }
         });
     }
@@ -657,7 +660,7 @@ void MainWindow::selectSampleForEditing(std::shared_ptr<Xybrid::Data::Sample> sm
         ui->spinSampleLoopStart->setValue(0);
         ui->spinSampleLoopEnd->setValue(0);
     } else {
-        editingSample = smp;
+        editingSample = nullptr;
         ui->sampleViewPane->setEnabled(true);
         ui->sampleInfo->setText(
             qs("%1 // %2\n%3 %4Hz, %5 frames (%6)")
@@ -681,6 +684,8 @@ void MainWindow::selectSampleForEditing(std::shared_ptr<Xybrid::Data::Sample> sm
             ui->spinSampleLoopStart->setValue(smp->loopStart);
             ui->spinSampleLoopEnd->setValue(smp->loopEnd);
         }
+
+        editingSample = smp;
     }
 
     ui->waveformPreview->setSample(smp);

xybrid/ui/gadgets/sampleselectorgadget.cpp

@@ -117,6 +117,7 @@ void SampleSelectorGadget::buildSubmenu(DirectoryNode* dir, QMenu* menu) {
             wa->setDefaultWidget(wfp);
             wfp->showName = true;
             wfp->highlightable = true;
+            wfp->showLoopPoints = false;
             wfp->setSample(s);
             wfp->setMinimumSize(192, 48);
             menu->addAction(wa);

xybrid/ui/waveformpreviewwidget.cpp

@@ -76,6 +76,17 @@ void WaveformPreviewWidget::paintEvent(QPaintEvent* event [[maybe_unused]]) {
             paintChannel(p, smp, 0, r);
             paintChannel(p, smp, 1, r.translated(0, cs));
         }
+        if (showLoopPoints && smp->loopStart >= 0) { // draw loop points if able
+            double scale = static_cast<double>(smp->length()) / static_cast<double>(rect.width());
+            p.setPen(Config::colorScheme.waveformLoopPoints);
+            auto x = rect.x();
+            auto y = rect.y();
+            auto h = rect.height();
+            auto xs = x + static_cast<int>(static_cast<double>(smp->loopStart)/scale);
+            auto xe = x + static_cast<int>(static_cast<double>(smp->loopEnd)/scale);
+            p.drawLine(QPoint(xs, y), QPoint(xs, y+h));
+            p.drawLine(QPoint(xe, y), QPoint(xe, y+h));
+        }
     }
 
     if (showName) {

xybrid/ui/waveformpreviewwidget.h

@@ -14,6 +14,7 @@ namespace Xybrid::UI {
     public:
         bool showName = false;
         bool highlightable = false;
+        bool showLoopPoints = true;
 
         explicit WaveformPreviewWidget(QWidget* parent = nullptr);