Add sample ghost for automation

data/themes/classic/style.css

@@ -36,6 +36,7 @@ lmms--gui--AutomationEditor {
 
 	qproperty-ghostNoteColor: rgba(248, 248, 255, 125);
 	qproperty-detuningNoteColor: rgba(248, 11, 11, 125);
+	qproperty-ghostSampleColor: rgba(125, 125, 125, 125);
 }
 
 /* text box */

data/themes/default/style.css

@@ -68,6 +68,7 @@ lmms--gui--AutomationEditor {
 	qproperty-scaleColor: #262b30;
 	qproperty-ghostNoteColor: rgba(248, 248, 255, 125);
 	qproperty-detuningNoteColor: rgba(248, 11, 11, 125);
+	qproperty-ghostSampleColor: rgba(125, 125, 125, 125);
 }
 
 /* text box */

include/AutomationEditor.h

@@ -35,6 +35,7 @@
 #include "Editor.h"
 #include "JournallingObject.h"
 #include "MidiClip.h"
+#include "SampleClip.h"
 #include "TimePos.h"
 #include "lmms_basics.h"
 
@@ -71,9 +72,11 @@ class AutomationEditor : public QWidget, public JournallingObject
 	Q_PROPERTY(QColor backgroundShade MEMBER m_backgroundShade)
 	Q_PROPERTY(QColor ghostNoteColor MEMBER m_ghostNoteColor)
 	Q_PROPERTY(QColor detuningNoteColor MEMBER m_detuningNoteColor)
+	Q_PROPERTY(QColor ghostSampleColor MEMBER m_ghostSampleColor)
 public:
 	void setCurrentClip(AutomationClip * new_clip);
 	void setGhostMidiClip(MidiClip* newMidiClip);
+	void setGhostSample(SampleClip* newSample);
 
 	inline const AutomationClip * currentClip() const
 	{
@@ -166,6 +169,7 @@ protected slots:
 	void resetGhostNotes()
 	{
 		m_ghostNotes = nullptr;
+		m_ghostSample = nullptr;
 		update();
 	}
 
@@ -196,6 +200,8 @@ protected slots:
 	static const int NOTE_HEIGHT = 10; // height of individual notes
 	static const int NOTE_MARGIN = 40; // total border margin for notes
 	static const int MIN_NOTE_RANGE = 20; // min number of keys for fixed size
+	static const int SAMPLE_MARGIN = 40;
+	static const int MAX_SAMPLE_HEIGHT = 400;
 
 	AutomationEditor();
 	AutomationEditor( const AutomationEditor & );
@@ -226,6 +232,8 @@ protected slots:
 	float m_topLevel;
 
 	MidiClip* m_ghostNotes = nullptr;
+	QPointer<SampleClip> m_ghostSample = nullptr; // QPointer to set to nullptr on deletion
+	bool m_renderSample = false;
 
 	void centerTopBottomScroll();
 	void updateTopBottomLevels();
@@ -279,6 +287,7 @@ protected slots:
 	QColor m_backgroundShade;
 	QColor m_ghostNoteColor;
 	QColor m_detuningNoteColor;
+	QColor m_ghostSampleColor;
 
 	friend class AutomationEditorWindow;
 
@@ -303,6 +312,7 @@ class AutomationEditorWindow : public Editor
 
 	void setCurrentClip(AutomationClip* clip);
 	void setGhostMidiClip(MidiClip* clip) { m_editor->setGhostMidiClip(clip); };
+	void setGhostSample(SampleClip* newSample) { m_editor->setGhostSample(newSample); };
 
 	const AutomationClip* currentClip();
 

include/SampleClipView.h

@@ -47,6 +47,7 @@ class SampleClipView : public ClipView
 public slots:
 	void updateSample();
 	void reverseSample();
+	void setAutomationGhost();
 
 
 

src/gui/clips/SampleClipView.cpp

@@ -28,6 +28,8 @@
 #include <QMenu>
 #include <QPainter>
 
+#include "GuiApplication.h"
+#include "AutomationEditor.h"
 #include "embed.h"
 #include "PathUtil.h"
 #include "SampleBuffer.h"
@@ -83,6 +85,12 @@ void SampleClipView::constructContextMenu(QMenu* cm)
 		SLOT(reverseSample())
 	);
 
+	cm->addAction(
+		embed::getIconPixmap("automation_ghost_note"),
+		tr("Set as ghost in automation editor"),
+		this,
+		SLOT(setAutomationGhost())
+	);
 
 }
 
@@ -325,6 +333,14 @@ void SampleClipView::reverseSample()
 
 
 
+void SampleClipView::setAutomationGhost()
+{
+	auto aEditor = gui::getGUI()->automationEditor();
+	aEditor->setGhostSample(m_clip);
+	aEditor->parentWidget()->show();
+	aEditor->show();
+	aEditor->setFocus();
+}
 
 //! Split this Clip.
 /*! \param pos the position of the split, relative to the start of the clip */

src/gui/editors/AutomationEditor.cpp

@@ -38,29 +38,32 @@
 #include <QToolTip>
 #include <cmath>
 
+#include "SampleClip.h"
+
 #ifndef __USE_XOPEN
 #define __USE_XOPEN
 #endif
 
 #include "ActionGroup.h"
 #include "AutomationNode.h"
 #include "ComboBox.h"
-#include "debug.h"
 #include "DeprecationHelper.h"
 #include "DetuningHelper.h"
-#include "embed.h"
 #include "Engine.h"
 #include "GuiApplication.h"
-#include "gui_templates.h"
 #include "Knob.h"
 #include "MainWindow.h"
 #include "MidiClip.h"
 #include "PatternStore.h"
 #include "PianoRoll.h"
 #include "ProjectJournal.h"
+#include "SampleBuffer.h"
 #include "StringPairDrag.h"
 #include "TextFloat.h"
 #include "TimeLineWidget.h"
+#include "debug.h"
+#include "embed.h"
+#include "gui_templates.h"
 
 
 namespace lmms::gui
@@ -1080,6 +1083,14 @@ void AutomationEditor::setGhostMidiClip(MidiClip* newMidiClip)
 {
 	// Expects a pointer to a MIDI clip or nullptr.
 	m_ghostNotes = newMidiClip;
+	m_renderSample = false;
+}
+
+void AutomationEditor::setGhostSample(SampleClip* newGhostSample)
+{
+	// Expects a pointer to a Sample buffer or nullptr.
+	m_ghostSample = newGhostSample;
+	m_renderSample = true;
 }
 
 void AutomationEditor::paintEvent(QPaintEvent * pe )
@@ -1266,8 +1277,24 @@ void AutomationEditor::paintEvent(QPaintEvent * pe )
 			p.drawLine( x, grid_bottom, x, x_line_end );
 		}
 
+		// draw ghost sample
+		if (m_ghostSample != nullptr && m_ghostSample->sampleBuffer()->frames() > 1 && m_renderSample)
+		{
+			int sampleFrames = m_ghostSample->sampleBuffer()->frames();
+			int length = static_cast<float>(sampleFrames) / Engine::framesPerTick();
+			int editorHeight = grid_bottom - TOP_MARGIN;
+
+			int startPos = xCoordOfTick(0);
+			int sampleWidth = xCoordOfTick(length) - startPos;
+			int sampleHeight = std::min(editorHeight - SAMPLE_MARGIN, MAX_SAMPLE_HEIGHT);
+			int yOffset = (editorHeight - sampleHeight) / 2.0f + TOP_MARGIN;
+
+			p.setPen(m_ghostSampleColor);
+			m_ghostSample->sampleBuffer()->visualize(p, QRect(startPos, yOffset, sampleWidth, sampleHeight), 0, sampleFrames);
+		}
+
 		// draw ghost notes
-		if (m_ghostNotes != nullptr)
+		if (m_ghostNotes != nullptr && !m_renderSample)
 		{
 			const NoteVector& notes = m_ghostNotes->notes();
 			int minKey = 128;