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#include <Wt/WServer>
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#include <Wt/WSignal>
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#include <Wt/WAnimation>
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#include <Wt/WStackedWidget>
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#include <Wt/WFitLayout>
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#include <Wt/WHBoxLayout>
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#include <Wt/WAnimation>
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#include <Wt/WText>
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#include <Wt/WIcon>
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#include <Wt/WBreak>
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#include <Wt/WPushButton>
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#include <Wt/WBootstrapTheme>
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using namespace Wt;
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class StackedWidget: public WStackedWidget
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{
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public:
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StackedWidget(WContainerWidget *parent=0) : WStackedWidget(parent){ setLayoutSizeAware(true); }
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void layoutSizeChanged(int width, int height) override {
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// calculate number of smileys that will require scrolling with available space
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int w = (std::max(width - 15, 90)) / 90;
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int h = (std::max(height, 70) / 70) * 2;
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smileys_ = "";
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for (int i=0; i < w * h; ++i)
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smileys_ += "<i class=\"fa fa-smile-o fa-5x fa-fw\"></i>";
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WStackedWidget::layoutSizeChanged(width, height);
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smileyChanged_.emit(smileys_);
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}
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Signal<std::string>& smileyChanged() { return smileyChanged_; }
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private:
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std::string smileys_;
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Signal<std::string> smileyChanged_;
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};
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class TestApplication : public WApplication
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{
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public:
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TestApplication(const WEnvironment& env);
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void addButton(const WString &text, const WAnimation &animation);
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private:
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static constexpr int FadeTime = 3000;
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WBootstrapTheme bs_theme_;
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StackedWidget* sw_ = nullptr;
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WText* smileyText_ = nullptr;
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WContainerWidget* lhs_ = nullptr;
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};
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void TestApplication::addButton(const WString &text, const WAnimation &animation)
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{
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(new WPushButton(text, lhs_))->clicked().connect(std::bind([this, animation] {
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sw_->setTransitionAnimation(animation);
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sw_->setCurrentIndex(sw_->currentIndex() ^ 1);
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}));
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}
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TestApplication::TestApplication(const WEnvironment& env) : WApplication(env)
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{
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setTitle("StackedWidget layout animation issue");
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setTheme(&bs_theme_);
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// workaround to load font-awesome icons...
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WIcon("bars");
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auto h_layout = new WHBoxLayout();
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(new WFitLayout(root()))->addItem(h_layout);
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h_layout->parentLayout()->setContentsMargins(0, 0, 0, 0);
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lhs_ = new WContainerWidget();
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new WText("<b>NOTES:</b><br/>"
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"Look for loss of scrollbar after initial fade transition.<br/><br/>", lhs_);
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addButton("Toggle StackedWidget (w/fade)", WAnimation(WAnimation::Fade, WAnimation::Linear, FadeTime));
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addButton("Toggle StackedWidget", WAnimation());
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h_layout->addWidget(lhs_);
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h_layout->addWidget(sw_ = new StackedWidget(), 1);
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auto sw0 = new WContainerWidget();
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sw0->decorationStyle().setBackgroundColor(lightGray);
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sw_->addWidget(sw0);
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auto sw1 = new WContainerWidget();
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sw1->setOverflow(WContainerWidget::OverflowAuto, Vertical);
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smileyText_ = new WText(sw1);
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sw_->addWidget(sw1);
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sw_->smileyChanged().connect(std::bind([this] (std::string smileys) {
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smileyText_->setText(smileys);
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}, std::placeholders::_1));
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}
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int main(int argc, char **argv)
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{
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return WRun(argc, argv, [](const WEnvironment& env) {return new TestApplication(env);});
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}
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