diff widgets/LayerTree.cpp @ 43:78515b1e29eb

* Rejig project file a bit to do pkg-config detection &c
  and change some HAVE_* symbol names accordingly
* Add selection move/resize/delete
* First stubs for add layer / pane commands

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widgets/LayerTree.cpp	Wed Mar 01 18:13:01 2006 +0000
@@ -0,0 +1,207 @@
+
+/* -*- c-basic-offset: 4 -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    A waveform viewer and audio annotation editor.
+    Chris Cannam, Queen Mary University of London, 2005-2006
+    
+    This is experimental software.  Not for distribution.
+*/
+
+#include "LayerTree.h"
+#include "PaneStack.h"
+
+#include "widgets/Pane.h"
+#include "base/Layer.h"
+
+#include <iostream>
+
+
+LayerTreeModel::LayerTreeModel(PaneStack *stack, QObject *parent) :
+    QAbstractItemModel(parent),
+    m_stack(stack)
+{
+}
+
+LayerTreeModel::~LayerTreeModel()
+{
+}
+
+QVariant
+LayerTreeModel::data(const QModelIndex &index, int role) const
+{
+    std::cerr << "LayerTreeModel::data(" << &index << ", role " << role << ")" << std::endl;
+
+    if (!index.isValid()) return QVariant();
+    if (role != Qt::DisplayRole) return QVariant();
+
+    QObject *obj = static_cast<QObject *>(index.internalPointer());
+    
+    PaneStack *paneStack = dynamic_cast<PaneStack *>(obj);
+    if (paneStack) {
+	std::cerr << "node is pane stack" << std::endl;
+	return QVariant("Pane stack");
+    }
+
+    Pane *pane = dynamic_cast<Pane *>(obj);
+    if (pane) {
+	// need index of pane in pane stack
+	for (int i = 0; i < m_stack->getPaneCount(); ++i) {
+	    if (pane == m_stack->getPane(i)) {
+		std::cerr << "node is pane " << i << std::endl;
+		return QVariant(QString("Pane %1").arg(i + 1));
+	    }
+	}
+	return QVariant();
+    }
+
+    Layer *layer = dynamic_cast<Layer *>(obj);
+    if (layer) {
+	std::cerr << "node is layer" << std::endl;
+	return QVariant(QString("%1").arg(layer->objectName()));
+    }
+
+    return QVariant();
+}
+
+/*
+Qt::ItemFlags
+LayerTreeModel::flags(const QModelIndex &index) const
+{
+}
+
+QVariant
+LayerTreeModel::headerData(const QModelIndex &index,
+			   Qt::Orientation orientation,
+			   int role) const
+{
+}
+*/
+
+QModelIndex
+LayerTreeModel::index(int row, int column, const QModelIndex &parent) const
+{
+    std::cerr << "LayerTreeModel::index(" << row << ", " << column << ", "
+	      << &parent << ")" << std::endl;
+
+    if (!parent.isValid()) {
+	// this is the pane stack
+	std::cerr << "parent invalid, returning pane stack as root" << std::endl;
+	return createIndex(row, column, m_stack);
+    }
+
+    QObject *obj = static_cast<QObject *>(parent.internalPointer());
+    
+    PaneStack *paneStack = dynamic_cast<PaneStack *>(obj);
+    if (paneStack) {
+	if (paneStack == m_stack && row < m_stack->getPaneCount()) {
+	    std::cerr << "parent is pane stack, returning a pane" << std::endl;
+	    return createIndex(row, column, m_stack->getPane(row));
+	}
+	std::cerr << "parent is wrong pane stack, returning nothing" << std::endl;
+	return QModelIndex();
+    }
+
+    Pane *pane = dynamic_cast<Pane *>(obj);
+    if (pane) {
+	if (row < pane->getLayerCount()) {
+	    std::cerr << "parent is pane, returning layer" << std::endl;
+	    return createIndex(row, column, pane->getLayer(row));
+	}
+    }
+
+    std::cerr << "unknown parent, returning nothing" << std::endl;
+    return QModelIndex();
+}
+
+QModelIndex
+LayerTreeModel::parent(const QModelIndex &index) const
+{
+    std::cerr << "LayerTreeModel::parent(" << &index << ")" << std::endl;
+
+    QObject *obj = static_cast<QObject *>(index.internalPointer());
+    
+    PaneStack *paneStack = dynamic_cast<PaneStack *>(obj);
+    if (paneStack) {
+	std::cerr << "node is pane stack, returning no parent" << std::endl;
+	return QModelIndex();
+    }
+
+    Pane *pane = dynamic_cast<Pane *>(obj);
+    if (pane) {
+	std::cerr << "node is pane, returning pane stack as parent" << std::endl;
+	return createIndex(0, 0, m_stack);
+    }
+
+    Layer *layer = dynamic_cast<Layer *>(obj);
+    if (layer) {
+	const View *view = layer->getView();
+	Pane *pane = const_cast<Pane *>(dynamic_cast<const Pane *>(view));
+	if (pane) {
+	    // need index of pane in pane stack
+	    for (int i = 0; i < m_stack->getPaneCount(); ++i) {
+		if (pane == m_stack->getPane(i)) {
+		    std::cerr << "node is layer, returning pane " << i << " as parent" << std::endl;
+		    return createIndex(i, 0, pane);
+		}
+	    }
+	}
+	std::cerr << "node is layer, but no parent found" << std::endl;
+	return QModelIndex();
+    }
+
+	
+
+    std::cerr << "unknown node" << std::endl;
+    return QModelIndex();
+}
+
+int
+LayerTreeModel::rowCount(const QModelIndex &parent) const
+{
+    std::cerr << "LayerTreeModel::rowCount(" << &parent << ")" << std::endl;
+
+    if (!parent.isValid()) {
+	std::cerr << "parent invalid, returning 1 for the pane stack" << std::endl;
+	return 1; // the pane stack
+    }
+
+    QObject *obj = static_cast<QObject *>(parent.internalPointer());
+    
+    PaneStack *paneStack = dynamic_cast<PaneStack *>(obj);
+    if (paneStack) {
+	if (paneStack == m_stack) {
+	    std::cerr << "parent is pane stack, returning "
+		      << m_stack->getPaneCount() << " panes" << std::endl;
+	    return m_stack->getPaneCount();
+	} else {
+	    return 0;
+	}
+    }
+ 
+    Pane *pane = dynamic_cast<Pane *>(obj);
+    if (pane) {
+	std::cerr << "parent is pane, returning "
+		  << pane->getLayerCount() << " layers" << std::endl;
+	return pane->getLayerCount();
+    }
+
+    std::cerr << "parent unknown, returning 0" << std::endl;
+    return 0;
+}
+
+int
+LayerTreeModel::columnCount(const QModelIndex &parent) const
+{
+    if (!parent.isValid()) return 1;
+
+    QObject *obj = static_cast<QObject *>(parent.internalPointer());
+    
+    Pane *pane = dynamic_cast<Pane *>(obj);
+    if (pane) {
+	return 1; // 2; // layer and model
+    }
+
+    return 1;
+}
+