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extern "C" {
#include <assert.h>
}
#include <escher/stack_view_controller.h>
#include <escher/app.h>
#include <escher/metric.h>
StackViewController::ControllerView::ControllerView() :
View(),
m_contentView(nullptr),
m_numberOfStacks(0),
m_displayStackHeaders(true)
{
}
void StackViewController::ControllerView::shouldDisplayStackHearders(bool shouldDisplay) {
m_displayStackHeaders = shouldDisplay;
}
void StackViewController::ControllerView::setContentView(View * view) {
m_contentView = view;
layoutSubviews();
markRectAsDirty(bounds());
}
void StackViewController::ControllerView::pushStack(Frame frame) {
m_stackViews[m_numberOfStacks].setNamedController(frame.viewController());
m_stackViews[m_numberOfStacks].setTextColor(frame.textColor());
m_stackViews[m_numberOfStacks].setBackgroundColor(frame.backgroundColor());
m_stackViews[m_numberOfStacks].setSeparatorColor(frame.separatorColor());
m_numberOfStacks++;
}
void StackViewController::ControllerView::popStack() {
assert(m_numberOfStacks > 0);
m_numberOfStacks--;
}
void StackViewController::ControllerView::layoutSubviews() {
KDCoordinate width = m_frame.width();
if (m_displayStackHeaders) {
for (int i=0; i<m_numberOfStacks; i++) {
m_stackViews[i].setFrame(KDRect(0, Metric::StackTitleHeight*i, width, Metric::StackTitleHeight + 1));
}
}
if (m_contentView) {
KDCoordinate separatorHeight = m_numberOfStacks > 0 ? 1 : 0;
KDRect contentViewFrame = KDRect( 0,
m_displayStackHeaders * (m_numberOfStacks * Metric::StackTitleHeight + separatorHeight),
width,
m_frame.height() - m_displayStackHeaders * m_numberOfStacks * Metric::StackTitleHeight);
m_contentView->setFrame(contentViewFrame);
}
}
int StackViewController::ControllerView::numberOfSubviews() const {
return (m_displayStackHeaders ? m_numberOfStacks : 0) + (m_contentView == nullptr ? 0 : 1);
}
View * StackViewController::ControllerView::subviewAtIndex(int index) {
if (!m_displayStackHeaders) {
assert(index == 0);
return m_contentView;
}
if (index < m_numberOfStacks) {
assert(index >= 0);
return &m_stackViews[index];
} else {
assert(index == m_numberOfStacks);
return m_contentView;
}
}
#if ESCHER_VIEW_LOGGING
const char * StackViewController::ControllerView::className() const {
return "StackViewController::ControllerView";
}
#endif
StackViewController::StackViewController(Responder * parentResponder, ViewController * rootViewController, KDColor textColor, KDColor backgroundColor, KDColor separatorColor) :
ViewController(parentResponder),
m_view(),
m_numberOfChildren(0),
m_isVisible(false)
{
pushModel(Frame(rootViewController, textColor, backgroundColor, separatorColor));
rootViewController->setParentResponder(this);
}
const char * StackViewController::title() {
ViewController * vc = m_childrenFrame[0].viewController();
return vc->title();
}
void StackViewController::push(ViewController * vc, KDColor textColor, KDColor backgroundColor, KDColor separatorColor) {
Frame frame = Frame(vc, textColor, backgroundColor, separatorColor);
/* Add the frame to the model */
pushModel(frame);
if (!m_isVisible) {
return;
}
/* Load stack view if the View Controller has a title. */
if (vc->title() != nullptr && vc->displayParameter() != ViewController::DisplayParameter::DoNotShowOwnTitle) {
m_view.pushStack(frame);
}
setupActiveViewController();
if (m_numberOfChildren > 1) {
m_childrenFrame[m_numberOfChildren-2].viewController()->viewDidDisappear();
}
}
void StackViewController::pop() {
assert(m_numberOfChildren > 0);
ViewController * vc = m_childrenFrame[m_numberOfChildren-1].viewController();
if (vc->title() != nullptr && vc->displayParameter() != ViewController::DisplayParameter::DoNotShowOwnTitle) {
m_view.popStack();
}
m_numberOfChildren--;
setupActiveViewController();
vc->setParentResponder(nullptr);
vc->viewDidDisappear();
}
int StackViewController::depth() {
return m_numberOfChildren;
}
void StackViewController::pushModel(Frame frame) {
m_childrenFrame[m_numberOfChildren++] = frame;
}
void StackViewController::setupActiveViewController() {
ViewController * vc = m_childrenFrame[m_numberOfChildren-1].viewController();
vc->setParentResponder(this);
m_view.shouldDisplayStackHearders(vc->displayParameter() != ViewController::DisplayParameter::WantsMaximumSpace);
m_view.setContentView(vc->view());
vc->viewWillAppear();
vc->setParentResponder(this);
app()->setFirstResponder(vc);
}
void StackViewController::didBecomeFirstResponder() {
ViewController * vc = m_childrenFrame[m_numberOfChildren-1].viewController();
app()->setFirstResponder(vc);
}
bool StackViewController::handleEvent(Ion::Events::Event event) {
if (event == Ion::Events::Back && m_numberOfChildren > 1) {
pop();
return true;
}
return false;
}
View * StackViewController::view() {
return &m_view;
}
void StackViewController::viewWillAppear() {
/* Load the stack view */
for (int i = 0; i < m_numberOfChildren; i++) {
ViewController * childrenVC = m_childrenFrame[i].viewController();
if (childrenVC->title() != nullptr && childrenVC->displayParameter() != ViewController::DisplayParameter::DoNotShowOwnTitle) {
m_view.pushStack(m_childrenFrame[i]);
}
}
/* Load the visible controller view */
ViewController * vc = m_childrenFrame[m_numberOfChildren-1].viewController();
if (m_numberOfChildren > 0 && vc) {
m_view.setContentView(vc->view());
m_view.shouldDisplayStackHearders(vc->displayParameter() != ViewController::DisplayParameter::WantsMaximumSpace);
vc->viewWillAppear();
}
m_isVisible = true;
}
void StackViewController::viewDidDisappear() {
ViewController * vc = m_childrenFrame[m_numberOfChildren-1].viewController();
if (m_numberOfChildren > 0 && vc) {
vc->viewDidDisappear();
}
for (int i = 0; i < m_view.numberOfStacks(); i++) {
m_view.popStack();
}
m_isVisible = false;
}
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