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#include <escher/table_view.h>
#include <escher/metric.h>
extern "C" {
#include <assert.h>
}
#define MIN(x,y) ((x)<(y) ? (x) : (y))
TableView::TableView(TableViewDataSource * dataSource, ScrollViewDataSource * scrollDataSource, KDCoordinate horizontalCellOverlapping, KDCoordinate verticalCellOverlapping, KDCoordinate topMargin, KDCoordinate rightMargin,
KDCoordinate bottomMargin, KDCoordinate leftMargin, bool showIndicators, bool colorBackground,
KDColor backgroundColor, KDCoordinate indicatorThickness, KDColor indicatorColor,
KDColor backgroundIndicatorColor, KDCoordinate indicatorMargin) :
ScrollView(&m_contentView, scrollDataSource, topMargin, rightMargin, bottomMargin, leftMargin, showIndicators, colorBackground,
backgroundColor, indicatorThickness, indicatorColor, backgroundIndicatorColor, indicatorMargin),
m_contentView(this, dataSource, horizontalCellOverlapping, verticalCellOverlapping)
{
}
KDSize TableView::minimalSizeForOptimalDisplay() const {
return m_contentView.minimalSizeForOptimalDisplay();
}
TableViewDataSource * TableView::dataSource() {
return m_contentView.dataSource();
}
// This method computes the minimal scrolling needed to properly display the
// requested cell.
void TableView::scrollToCell(int i, int j) {
m_contentView.scrollToCell(i, j);
}
HighlightCell * TableView::cellAtLocation(int i, int j) {
return m_contentView.cellAtLocation(i, j);
}
#if ESCHER_VIEW_LOGGING
const char * TableView::className() const {
return "TableView";
}
#endif
void TableView::layoutSubviews() {
// We only have to layout our contentView.
// We will size it here, and ScrollView::layoutSubviews will position it.
m_contentView.resizeToFitContent();
ScrollView::layoutSubviews();
}
void TableView::reloadCellAtLocation(int i, int j) {
m_contentView.reloadCellAtLocation(i, j);
}
/* TableView::ContentView */
TableView::ContentView::ContentView(TableView * tableView, TableViewDataSource * dataSource, KDCoordinate horizontalCellOverlapping, KDCoordinate verticalCellOverlapping) :
View(),
m_tableView(tableView),
m_dataSource(dataSource),
m_horizontalCellOverlapping(horizontalCellOverlapping),
m_verticalCellOverlapping(verticalCellOverlapping)
{
}
KDSize TableView::ContentView::minimalSizeForOptimalDisplay() const {
return KDSize(width(), height());
}
TableViewDataSource * TableView::ContentView::dataSource() {
return m_dataSource;
}
KDCoordinate TableView::ContentView::columnWidth(int i) const {
int columnWidth = m_dataSource->columnWidth(i);
columnWidth = columnWidth ? columnWidth : m_tableView->maxContentWidthDisplayableWithoutScrolling();
return columnWidth;
}
void TableView::ContentView::resizeToFitContent() {
layoutSubviews();
setSize(KDSize(width(), height()));
}
KDCoordinate TableView::ContentView::height() const {
return m_dataSource->cumulatedHeightFromIndex(m_dataSource->numberOfRows())+m_verticalCellOverlapping;
}
KDCoordinate TableView::ContentView::width() const {
int result = m_dataSource->cumulatedWidthFromIndex(m_dataSource->numberOfColumns())+m_horizontalCellOverlapping;
// handle the case of list: cumulatedWidthFromIndex() = 0
return result ? result : m_tableView->maxContentWidthDisplayableWithoutScrolling();
}
void TableView::ContentView::scrollToCell(int x, int y) const {
KDRect cellRect = KDRect(m_dataSource->cumulatedWidthFromIndex(x), m_dataSource->cumulatedHeightFromIndex(y), columnWidth(x), m_dataSource->rowHeight(y));
m_tableView->scrollToContentRect(cellRect, true);
}
void TableView::ContentView::reloadCellAtLocation(int i, int j) {
m_dataSource->willDisplayCellAtLocation(cellAtLocation(i, j), i, j);
}
int TableView::ContentView::typeOfSubviewAtIndex(int index) const {
assert(index >= 0);
int i = absoluteColumnNumberFromSubviewIndex(index);
int j = absoluteRowNumberFromSubviewIndex(index);
int type = m_dataSource->typeAtLocation(i, j);
return type;
}
int TableView::ContentView::typeIndexFromSubviewIndex(int index, int type) const {
int typeIndex = 0;
for (int k = 0; k < index; k++) {
if (typeOfSubviewAtIndex(k) == type) {
typeIndex++;
}
}
assert(typeIndex < m_dataSource->reusableCellCount(type));
return typeIndex;
}
HighlightCell * TableView::ContentView::cellAtLocation(int x, int y) {
int relativeX = x-columnsScrollingOffset();
int relativeY = y-rowsScrollingOffset();
int type = m_dataSource->typeAtLocation(x, y);
int index = relativeY*numberOfDisplayableColumns()+relativeX;
int typeIndex = typeIndexFromSubviewIndex(index, type);
return m_dataSource->reusableCell(typeIndex, type);
}
#if ESCHER_VIEW_LOGGING
const char * TableView::ContentView::className() const {
return "TableView::ContentView";
}
#endif
int TableView::ContentView::numberOfSubviews() const {
int result = numberOfDisplayableRows() * numberOfDisplayableColumns();
return result;
}
int TableView::ContentView::absoluteColumnNumberFromSubviewIndex(int index) const {
/* "x = i % columns" but we avoid a call to modulo not to implement
* "__aeabi_idivmod" */
int j = index / numberOfDisplayableColumns();
int i = index - j * numberOfDisplayableColumns();
int columnOffset = columnsScrollingOffset();
return i + columnOffset;
}
int TableView::ContentView::absoluteRowNumberFromSubviewIndex(int index) const {
int j = index / numberOfDisplayableColumns();
int rowOffset = rowsScrollingOffset();
return j + rowOffset;
}
View * TableView::ContentView::subviewAtIndex(int index) {
int type = typeOfSubviewAtIndex(index);
int typeIndex = typeIndexFromSubviewIndex(index, type);
return m_dataSource->reusableCell(typeIndex, type);
}
void TableView::ContentView::layoutSubviews() {
for (int index=0; index<numberOfSubviews(); index++) {
View * cell = subview(index);
int i = absoluteColumnNumberFromSubviewIndex(index);
int j = absoluteRowNumberFromSubviewIndex(index);
m_dataSource->willDisplayCellAtLocation((HighlightCell *)cell, i, j);
KDCoordinate rowHeight = m_dataSource->rowHeight(j);
KDCoordinate columnWidth = this->columnWidth(i);
KDCoordinate verticalOffset = m_dataSource->cumulatedHeightFromIndex(j);
KDCoordinate horizontalOffset = m_dataSource->cumulatedWidthFromIndex(i);
KDRect cellFrame(horizontalOffset, verticalOffset,
columnWidth+m_horizontalCellOverlapping, rowHeight+m_verticalCellOverlapping);
cell->setFrame(cellFrame);
}
}
int TableView::ContentView::numberOfFullyDisplayableRows() const {
// The number of displayable rows taking into accounts margins
int rowOffsetWithMargin = m_dataSource->indexFromCumulatedHeight(m_tableView->contentOffset().y() +
m_tableView->topMargin());
int displayedHeightWithOffsetAndMargin = m_dataSource->indexFromCumulatedHeight(m_tableView->maxContentHeightDisplayableWithoutScrolling() +
m_tableView->contentOffset().y() + m_tableView->topMargin());
return displayedHeightWithOffsetAndMargin - rowOffsetWithMargin;
}
int TableView::ContentView::numberOfFullyDisplayableColumns() const {
// The number of displayable rows taking into accounts margins
int columnOffsetWithMargin = m_dataSource->indexFromCumulatedWidth(m_tableView->contentOffset().x() +
m_tableView->leftMargin());
int displayedWidthWithOffsetAndMargin = m_dataSource->indexFromCumulatedWidth(m_tableView->maxContentWidthDisplayableWithoutScrolling() +
m_tableView->contentOffset().x() + m_tableView->leftMargin());
return displayedWidthWithOffsetAndMargin - columnOffsetWithMargin;
}
int TableView::ContentView::numberOfDisplayableRows() const {
int rowOffset = rowsScrollingOffset();
int displayedHeightWithOffset = m_dataSource->indexFromCumulatedHeight(m_tableView->bounds().height() + m_tableView->contentOffset().y());
return MIN(
m_dataSource->numberOfRows(),
displayedHeightWithOffset + 1
) - rowOffset;
}
int TableView::ContentView::numberOfDisplayableColumns() const {
int columnOffset = columnsScrollingOffset();
int displayedWidthWithOffset = m_dataSource->indexFromCumulatedWidth(m_tableView->bounds().width() + m_tableView->contentOffset().x());
return MIN(
m_dataSource->numberOfColumns(),
displayedWidthWithOffset + 1
) - columnOffset;
}
int TableView::ContentView::rowsScrollingOffset() const {
/* Here, we want to translate the offset at which our tableView is displaying
* us into an integer offset we can use to ask cells to our data source. */
KDCoordinate invisibleHeight = m_tableView->contentOffset().y()-m_tableView->topMargin();
invisibleHeight = invisibleHeight < 0 ? 0 : invisibleHeight;
return m_dataSource->indexFromCumulatedHeight(invisibleHeight);
}
int TableView::ContentView::columnsScrollingOffset() const {
/* Here, we want to translate the offset at which our tableView is displaying
* us into an integer offset we can use to ask cells to our data source. */
KDCoordinate invisibleWidth = m_tableView->contentOffset().x()-m_tableView->leftMargin();
invisibleWidth = invisibleWidth < 0 ? 0 : invisibleWidth;
return m_dataSource->indexFromCumulatedWidth(invisibleWidth);
}
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