tab_view.cpp
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#include <escher/tab_view.h>
#include <escher/tab_view_controller.h>
extern "C" {
#include <assert.h>
}
TabView::TabView() :
View(),
m_numberOfTabs(0),
m_activeTabIndex(-1),
m_selectedTabIndex(-1)
{
}
int TabView::numberOfTabs() const {
return m_numberOfTabs;
}
void TabView::drawRect(KDContext * ctx, KDRect rect) const {
KDCoordinate height = bounds().height();
KDCoordinate width = bounds().width();
// Draw a separator with the content
ctx->fillRect(KDRect(0, height-k_activeTabHeight, width, k_activeTabHeight), KDColorWhite);
}
void TabView::addTab(ViewController * controller) {
assert(m_numberOfTabs < k_maxNumberOfTabs);
uint8_t tabIndex = m_numberOfTabs;
m_cells[tabIndex].setNamedController(controller);
m_numberOfTabs++;
markRectAsDirty(bounds());
}
void TabView::setActiveIndex(int index) {
assert(index < m_numberOfTabs);
if (m_activeTabIndex == index) {
return;
}
if (m_activeTabIndex >= 0) {
m_cells[m_activeTabIndex].setActive(false);
}
m_activeTabIndex = index;
m_cells[m_activeTabIndex].setActive(true);
}
void TabView::setSelectedIndex(int index) {
assert(index < m_numberOfTabs);
if (m_selectedTabIndex == index) {
return;
}
if (m_selectedTabIndex >= 0) {
m_cells[m_selectedTabIndex].setSelected(false);
}
m_selectedTabIndex = index;
if (m_selectedTabIndex >= 0) {
m_cells[m_selectedTabIndex].setSelected(true);
}
}
int TabView::numberOfSubviews() const {
return m_numberOfTabs;
}
View * TabView::subviewAtIndex(int index) {
assert(index < m_numberOfTabs);
return &m_cells[index];
}
void TabView::layoutSubviews() {
KDCoordinate emptyWidth = bounds().width();
for (int i=0; i<m_numberOfTabs; i++) {
emptyWidth -= m_cells[i].minimalSizeForOptimalDisplay().width();
}
KDCoordinate widthUsed = 0;
for (int i=0; i<m_numberOfTabs; i++) {
KDCoordinate tabWidth = m_cells[i].minimalSizeForOptimalDisplay().width() + emptyWidth/m_numberOfTabs;
/* Avoid a unused one-pixel-width vertical on the left due to rounding error */
if (i == m_numberOfTabs - 1) {
tabWidth = bounds().width() - widthUsed;
}
KDRect cellFrame = KDRect(
widthUsed, 0,
tabWidth, m_frame.height() - k_activeTabHeight
);
m_cells[i].setFrame(cellFrame);
widthUsed += tabWidth;
}
}
#if ESCHER_VIEW_LOGGING
const char * TabView::className() const {
return "TabView";
}
void TabView::logAttributes(std::ostream &os) const {
View::logAttributes(os);
os << " numberOfTabs=\"" << (int)m_numberOfTabs << "\"";
os << " activeTabIndex=\"" << (int)m_activeTabIndex << "\"";
}
#endif