1 files changed, 158 insertions, 0 deletions
diff --git a/viewGridNavigator.cpp b/viewGridNavigator.cpp
new file mode 100644
index 0000000..78781ca
--- /dev/null
+++ b/viewGridNavigator.cpp
@@ -0,0 +1,158 @@
+#include "viewGridNavigator.h"
+
+unsigned int cGridElement::AbsoluteGridIdCounter = 0;
+
+cGridElement::cGridElement()
+{
+	m_iGridId = AbsoluteGridIdCounter++;
+	Position = -1;
+	m_bInit = true;
+}
+
+cViewGridNavigator::cViewGridNavigator(cViewGrid* viewGrid)
+{
+	m_columns = 2;
+	m_rows = 2;
+	m_newDimensions = true;
+	m_setIterator = true;
+
+	m_pGrid = std::shared_ptr<cViewGrid>(viewGrid);
+}
+
+
+void cViewGridNavigator::FilterElements(int scrollOffset)
+{
+	int startOffset = scrollOffset;
+	int endOffset = startOffset + (m_rows * m_columns);
+	if(scrollOffset < 0) {
+		endOffset = (m_rows * m_columns) + scrollOffset;
+	}
+
+	std::vector<cGridElement*>::iterator begin = m_firstElementIter + startOffset;
+	std::vector<cGridElement*>::iterator end = m_firstElementIter + endOffset;
+	if(end > m_vElements.end()) end = m_vElements.end();
+
+	int pos = 0;
+	for(std::vector<cGridElement*>::iterator it = begin; it != end; ++it) {
+		cGridElement *elem = *it;
+		elem->Position = pos++;
+		SetGridElementData(elem);
+	}
+
+	if(m_setIterator) {
+		m_activeElementIter = begin;
+		m_pGrid->SetCurrent((*m_activeElementIter)->GridElementId(), true);
+		m_setIterator = false;
+	}
+
+	//remove non visible elements from grid
+	if(scrollOffset !=0 ) {
+		auto startIt = m_firstElementIter;
+		auto endIt = m_firstElementIter + scrollOffset;
+		if(scrollOffset < 0) {
+			startIt = m_lastElementIter + scrollOffset;
+			endIt = m_lastElementIter;
+		}
+		if(startIt < m_vElements.begin()) startIt = m_vElements.begin();
+		if(endIt > m_vElements.end()) endIt = m_vElements.end();
+
+		for(std::vector<cGridElement*>::iterator it = startIt; it != endIt; ++it) {
+			m_pGrid->Delete((*it)->GridElementId());
+			(*it)->Dirty();
+			(*it)->Position = -1;
+		}
+	}
+
+	m_firstElementIter = begin;
+	m_lastElementIter = end;
+	m_newDimensions = false;
+}
+
+void cViewGridNavigator::SetGridElementData(cGridElement *obj)
+{
+	// calculate position
+	double row, column, x, y, height, width;
+
+	row = floor(obj->Position / m_columns);
+	column = obj->Position - (row * m_columns);
+	width = 1.0 / m_columns;
+	height = 1.0 / m_rows;
+	x = width * column;
+	y= height * row;
+
+	//std::cout << "ID: " << obj->GridElementId() << "\tPos: " << obj->Position << "\t\tx: " << x << "\t\ty: " << y << "\t\twi: " << width << "\t\thei: " <<  height << "\tCol: " << column << "\tRow: " << row << std::endl;
+
+	if(obj->IsNew() || m_newDimensions) {
+		// fill data
+		obj->AddTokens(m_pGrid);
+		m_pGrid->SetGrid(obj->GridElementId(), x, y, width, height);
+		obj->InitFinished();
+	} else {
+		m_pGrid->MoveGrid(obj->GridElementId(), x, y, width, height);
+	}
+}
+
+void cViewGridNavigator::SetGridDimensions(int rows, int columns)
+{
+	m_rows = rows;
+	m_columns = columns;
+	m_newDimensions = true;
+}
+
+void cViewGridNavigator::NavigateDown()
+{
+	if(m_activeElementIter + m_columns >= m_vElements.end()) return;
+	auto next = m_activeElementIter + m_columns;
+	// scroll down?
+	if(!(*next)->IsVisible()) {
+		FilterElements(m_columns);
+	}
+
+	m_pGrid->SetCurrent((*m_activeElementIter)->GridElementId(), false);
+	m_pGrid->SetCurrent((*next)->GridElementId(), true);
+	m_activeElementIter = next;
+}
+
+void cViewGridNavigator::NavigateUp()
+{
+	if(m_activeElementIter - m_columns < m_vElements.begin()) return;
+	auto next = m_activeElementIter - m_columns;
+	//scroll up?
+	if(!(*next)->IsVisible()) {
+		FilterElements(-m_columns);
+	}
+
+	m_pGrid->SetCurrent((*m_activeElementIter)->GridElementId(), false);
+	m_pGrid->SetCurrent((*next)->GridElementId(), true);
+	m_activeElementIter = next;
+}
+
+void cViewGridNavigator::NavigateLeft()
+{
+	auto next = m_activeElementIter - 1;
+	if(next < m_vElements.begin()) next = m_vElements.begin();
+
+	if(!(*next)->IsVisible()) {
+		auto temp = m_activeElementIter;
+		FilterElements(-m_columns);
+		m_activeElementIter = temp;
+	}
+
+	m_pGrid->SetCurrent((*m_activeElementIter)->GridElementId(), false);
+	m_pGrid->SetCurrent((*next)->GridElementId(), true);
+	m_activeElementIter = next;
+}
+
+void cViewGridNavigator::NavigateRight()
+{
+	auto next = m_activeElementIter + 1;
+	if(next >= m_vElements.end()) next = m_vElements.end()-1;
+
+	if(!(*next)->IsVisible()) {
+		FilterElements(m_columns);
+	}
+
+	m_pGrid->SetCurrent((*m_activeElementIter)->GridElementId(), false);
+	m_pGrid->SetCurrent((*next)->GridElementId(), true);
+	m_activeElementIter = next;
+}