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Support variable width tabs slider.

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This commit is contained in:
John Preston 2017-11-12 17:47:11 +04:00
parent 0255d0c59e
commit fc66550a32
2 changed files with 52 additions and 4 deletions
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52
Telegram/SourceFiles/ui/widgets/discrete_sliders.cpp
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@ -103,6 +103,15 @@ void DiscreteSlider::enumerateSections(Lambda callback) {
}
}
template <typename Lambda>
void DiscreteSlider::enumerateSections(Lambda callback) const {
for (auto &section : _sections) {
if (!callback(section)) {
return;
}
}
}
void DiscreteSlider::mousePressEvent(QMouseEvent *e) {
auto index = getIndexFromPosition(e->pos());
if (_selectOnPress) {
@ -183,20 +192,55 @@ void SettingsSlider::resizeSections(int newWidth) {
auto count = getSectionsCount();
if (!count) return;
auto sectionsWidth = newWidth - (count - 1) * _st.barSkip;
auto sectionWidth = sectionsWidth / float64(count);
auto sectionWidths = countSectionsWidths(newWidth);
auto skip = 0;
auto x = 0.;
enumerateSections([this, &x, &skip, sectionWidth](Section &section) {
auto sectionWidth = sectionWidths.begin();
enumerateSections([&](Section &section) {
Expects(sectionWidth != sectionWidths.end());
section.left = qFloor(x) + skip;
x += sectionWidth;
x += *sectionWidth;
section.width = qRound(x) - (section.left - skip);
skip += _st.barSkip;
++sectionWidth;
return true;
});
stopAnimation();
}
std::vector<float64> SettingsSlider::countSectionsWidths(
int newWidth) const {
auto count = getSectionsCount();
auto sectionsWidth = newWidth - (count - 1) * _st.barSkip;
auto sectionWidth = sectionsWidth / float64(count);
auto result = std::vector<float64>(count, sectionWidth);
auto labelsWidth = 0;
auto commonWidth = true;
enumerateSections([&](const Section &section) {
labelsWidth += section.labelWidth;
if (section.labelWidth >= sectionWidth) {
commonWidth = false;
}
return true;
});
// If labelsWidth > sectionsWidth we're screwed anyway.
if (!commonWidth && labelsWidth <= sectionsWidth) {
auto padding = (sectionsWidth - labelsWidth) / (2. * count);
auto currentWidth = result.begin();
enumerateSections([&](const Section &section) {
Expects(currentWidth != result.end());
*currentWidth = padding + section.labelWidth + padding;
++currentWidth;
return true;
});
}
return result;
}
int SettingsSlider::resizeGetHeight(int newWidth) {
resizeSections(newWidth);
return _st.height;

4
Telegram/SourceFiles/ui/widgets/discrete_sliders.h
View file

@ -71,6 +71,9 @@ protected:
template <typename Lambda>
void enumerateSections(Lambda callback);
template <typename Lambda>
void enumerateSections(Lambda callback) const;
virtual void startRipple(int sectionIndex) {
}
@ -122,6 +125,7 @@ private:
QImage prepareRippleMask(int sectionIndex, const Section &section);
void resizeSections(int newWidth);
std::vector<float64> countSectionsWidths(int newWidth) const;
const style::SettingsSlider &_st;
int _rippleTopRoundRadius = 0;