audio clip editor: starting to add display material

gtk2_ardour/audio_clip_editor.cc

@@ -16,10 +16,18 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
+#include "ardour/audioregion.h"
+
+#include "waveview/wave_view.h"
+
 #include "audio_clip_editor.h"
 
 #include "pbd/i18n.h"
 
+using namespace ARDOUR;
+using namespace ArdourWaveView;
+using namespace ArdourCanvas;
+
 AudioClipEditor::AudioClipEditor ()
 {
 
@@ -27,4 +35,51 @@ AudioClipEditor::AudioClipEditor ()
 
 AudioClipEditor::~AudioClipEditor ()
 {
+	drop_waves ();
+}
+
+void
+AudioClipEditor::drop_waves ()
+{
+	for (auto & wave : waves) {
+		delete wave;
+	}
+
+	waves.clear ();
+}
+
+void
+AudioClipEditor::set_region (boost::shared_ptr<AudioRegion> r)
+{
+	drop_waves ();
+
+	uint32_t n_chans = r->n_channels ();
+
+	for (uint32_t n = 0; n < n_chans; ++n) {
+		WaveView* wv = new WaveView (this, r);
+		wv->set_channel (n);
+		waves.push_back (wv);
+	}
+
+	int h = get_allocation().get_height ();
+
+	if (h) {
+		set_wave_heights (h);
+	}
+}
+
+void
+AudioClipEditor::size_allocate (Gtk::Allocation const & alloc)
+{
+	GtkCanvas::size_allocate (alloc);
+
+	set_wave_heights (alloc.get_height());
+}
+
+void
+AudioClipEditor::set_wave_heights (int h)
+{
+	for (auto & wave : waves) {
+		wave->set_height (h/waves.size());
+	}
 }

gtk2_ardour/audio_clip_editor.h

@@ -19,13 +19,32 @@
 #ifndef __gtk2_ardour_audio_clip_editor_h__
 #define __gtk2_ardour_audio_clip_editor_h__
 
+#include <vector>
+
 #include "canvas/canvas.h"
 
+namespace ARDOUR {
+class AudioRegion;
+}
+
+namespace ArdourWaveView {
+class WaveView;
+}
+
 class AudioClipEditor : public ArdourCanvas::GtkCanvas
 {
    public:
 	AudioClipEditor ();
 	~AudioClipEditor ();
+
+	void set_region (boost::shared_ptr<ARDOUR::AudioRegion>);
+
+  private:
+	std::vector<ArdourWaveView::WaveView *> waves;
+
+	void drop_waves ();
+	void size_allocate (Gtk::Allocation const &);
+	void set_wave_heights (int);
 };
 
 

gtk2_ardour/trigger_page.cc

@@ -38,6 +38,8 @@
 #include "ui_config.h"
 #include "utils.h"
 
+#include "audio_clip_editor.h"
+
 #include "pbd/i18n.h"
 
 #define PX_SCALE(px) std::max ((float)px, rintf ((float)px* UIConfiguration::instance ().get_ui_scale ()))