Wt

#include <Wt/WApplication>

#include <Wt/WEnvironment>

#include <Wt/WContainerWidget>

#include <Wt/WDialog>

#include <Wt/WPushButton>

#include <Wt/WText>

#include <Wt/WTable>

#include <Wt/WCssTheme>

#include <Wt/WBootstrapTheme>

using namespace Wt;

class TestApplication : public WApplication

{

public:

  TestApplication(const WEnvironment& env);

  ~TestApplication() { delete theme_css_; }

private:

  int next_dialog_ {0};

  const int POSITION_ROWS = 4;

  const int POSITION_COLS = 5;

  WBootstrapTheme theme_;

  WCssTheme *theme_css_;

};

TestApplication::TestApplication(const WEnvironment& env) : WApplication(env), theme_css_(0)

{

  setTitle("Test WDialog Escape");

  const std::string *themePtr = env.getParameter("theme");

  std::string theme_s;

  if (!themePtr)

    theme_s = "bootstrap3";

  else

    theme_s = *themePtr;

  if (theme_s == "bootstrap2") {

    theme_.setVersion(WBootstrapTheme::Version2);

    setTheme(&theme_);

  }

  else if (theme_s == "bootstrap3") {

    theme_.setVersion(WBootstrapTheme::Version3);

    setTheme(&theme_);

  }

  else {

    theme_css_ = new WCssTheme(theme_s);

    setTheme(theme_css_);

  }

  new WText("<h4>Try different themes using theme parameter. Move and resize windows. "

      "Try using an initial window around the size of the grid and expanding it after "

      "opening a few dialogs.</h4>", root());

  auto openDialogButton = new WPushButton("Open WDialog", root());

  auto positionTable = new WTable(root());

  for (int row=0; row <  POSITION_ROWS; row++) {

    for (int col=0; col < POSITION_COLS; col++) {

      positionTable->elementAt(row, col)->resize(80, 80);

      WCssDecorationStyle(ds);

      ds.setBackgroundColor(WColor(11*(row*POSITION_COLS+col),

            11*(row*POSITION_COLS+col), 11*(row*POSITION_COLS+col)));

      positionTable->elementAt(row, col)->setDecorationStyle(ds);

    }

  }

  openDialogButton->clicked().connect(std::bind([=] {

    int row = (next_dialog_  * 3 / POSITION_COLS) % POSITION_ROWS;

    int col = next_dialog_ * 3 % POSITION_COLS;

    next_dialog_ += 1;

    auto dialog = new WDialog("Click to raise");

    dialog->setModal(false);

    dialog->setResizable(true);

    dialog->setClosable(true);

    dialog->rejectWhenEscapePressed(true);

    dialog->positionAt(positionTable->elementAt(row, col));

    new WText(WString("<h1>Dialog {1}</h1>").arg(next_dialog_),

      dialog->contents());

    dialog->setCanReceiveFocus(true);

  }));

}

int main(int argc, char **argv)

{

  return WRun(argc, argv, [](const WEnvironment& env) {return new TestApplication(env);});

}