scroll_view_indicator.cpp
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#include <escher/scroll_view_indicator.h>
#include <escher/palette.h>
extern "C" {
#include <assert.h>
}
ScrollViewIndicator::ScrollViewIndicator(ScrollViewIndicator::Direction direction) :
View(),
m_direction(direction),
m_start(0),
m_end(0),
m_indicatorColor(Palette::GreyDark),
m_backgroundColor(Palette::GreyMiddle),
m_margin(14)
{
}
void ScrollViewIndicator::drawRect(KDContext * ctx, KDRect rect) const {
KDRect frame = KDRectZero;
if (m_direction == Direction::Horizontal) {
frame = KDRect(m_margin, (m_frame.height() - k_indicatorThickness)/2,
m_frame.width() - 2*m_margin, k_indicatorThickness);
} else {
assert(m_direction == Direction::Vertical);
frame = KDRect((m_frame.width() - k_indicatorThickness)/2, m_margin,
k_indicatorThickness, m_frame.height() - 2*m_margin);
}
ctx->fillRect(frame, m_backgroundColor);
KDRect indicatorFrame = KDRectZero;
if (m_direction == Direction::Horizontal) {
KDCoordinate indicatorWidth = m_frame.width() - 2*m_margin;
indicatorFrame = KDRect(m_margin+m_start*indicatorWidth, (m_frame.height() - k_indicatorThickness)/2,
(m_end-m_start)*indicatorWidth, k_indicatorThickness);
} else {
assert(m_direction == Direction::Vertical);
KDCoordinate indicatorHeight = m_frame.height() - 2*m_margin;
indicatorFrame = KDRect((m_frame.width() - k_indicatorThickness)/2, m_margin+m_start*indicatorHeight,
k_indicatorThickness, (m_end-m_start)*indicatorHeight);
}
ctx->fillRect(indicatorFrame, m_indicatorColor);
}
float ScrollViewIndicator::start() const {
return m_start;
}
void ScrollViewIndicator::setStart(float start) {
if (m_start != start) {
m_start = start;
markRectAsDirty(bounds());
}
}
float ScrollViewIndicator::end() const {
return m_end;
}
void ScrollViewIndicator::setEnd(float end) {
if (m_end != end) {
m_end = end;
markRectAsDirty(bounds());
}
}
KDRect ScrollViewIndicator::frame() {
return m_frame;
}
#if ESCHER_VIEW_LOGGING
const char * ScrollViewIndicator::className() const {
return "ScrollViewIndicator";
}
void ScrollViewIndicator::logAttributes(std::ostream &os) const {
View::logAttributes(os);
os << " start=\"" << m_start << "\"";
os << " end=\"" << m_end << "\"";
}
#endif