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Improvements #14356 » main.cpp

Michael Seibt, 02/25/2026 09:19 AM

 
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#include <Wt/WAbstractTableModel.h>
#pragma GCC diagnostic pop
#include <Wt/WApplication.h>
#include <Wt/WBootstrap5Theme.h>
#include <Wt/WCheckBox.h>
#include <Wt/WContainerWidget.h>
#include <Wt/WDialog.h>
#include <Wt/WEvent.h>
#include <Wt/WGridLayout.h>
#include <Wt/WGroupBox.h>
#include <Wt/WHBoxLayout.h>
#include <Wt/WLabel.h>
#include <Wt/WLineEdit.h>
#include <Wt/WMenuItem.h>
#include <Wt/WMessageBox.h>
#include <Wt/WPanel.h>
#include <Wt/WPopupMenu.h>
#include <Wt/WPushButton.h>
#include <Wt/WRadioButton.h>
#include <Wt/WSelectionBox.h>
#include <Wt/WServer.h>
#include <Wt/WTable.h>
#include <Wt/WTableView.h>
#include <Wt/WTabWidget.h>
#include <Wt/WText.h>
#include <Wt/WVBoxLayout.h>

using namespace std;
using namespace Wt;
using namespace Wt::cpp17;

#define SET_BS5THEME 1

// Always apply theme before creating widgets!
class CThemedApplication : public WApplication
{
public:
CThemedApplication(const WEnvironment& rcEnv)
: WApplication{rcEnv}
{
#if SET_BS5THEME
setTheme(make_shared<WBootstrap5Theme>());
#endif
}
};

class CFixedTableModel : public WAbstractTableModel
{
public:
CFixedTableModel(const int rowCount, const int colCount)
: _rowCount{rowCount}
, _colCount{colCount}
{ }

any headerData(const int section, const Orientation orientation, const ItemDataRole role) const
{
if (orientation != Orientation::Horizontal) throw invalid_argument("orientation");
switch (role.value())
{
default: return {};
case ItemDataRole::Display: return format("C{}", section);
}
}

any data(const WModelIndex& index, const ItemDataRole role) const override
{
if (!index.isValid()) return {};
switch (role.value())
{
default: return {};
case ItemDataRole::Display: return format("{}, {}", index.row(), index.column());
}
}

int columnCount(const WModelIndex& index) const override { return index.isValid() ? 0 : _colCount; }
int rowCount (const WModelIndex& index) const override { return index.isValid() ? 0 : _rowCount; }

const int _rowCount;
const int _colCount;
};

template<typename T, typename... TArgs>
constexpr inline
std::unique_ptr<T> create(std::function<void (T&)>&& fInitialize, TArgs&&... args)
{
std::unique_ptr<T> Ptr{std::make_unique<T>(std::forward<TArgs>(args)...)};
fInitialize(*Ptr);
return Ptr;
}

class CApplication final : public CThemedApplication
{
public:
CApplication(const WEnvironment& rcEnv);

static void setAccessKey(WInteractWidget& widget, const char mnemonic) { widget.setAttributeValue("accesskey", string(1, tolower(mnemonic))); }

static void suppressBrowserContextMenu(WWidget& rWidget)
{
rWidget.setAttributeValue("oncontextmenu", "event.cancelBubble = true; event.returnValue = false; return false;");
}

private:
WServer& _Server; //!< The associated WServer instance, needed for async operations.

WContainerWidget& _cntRoot{*root()};
WBoxLayout& _lytRoot{*_cntRoot.setLayout(make_unique<WVBoxLayout>())};

WPushButton& _btnPopup{*_lytRoot.addWidget(create<WPushButton>([this](auto& btnPopup)
{
btnPopup.clicked().connect([this]
{
log("trace") << "_btnPopup.clicked";
_dlgPopup.show();
});
btnPopup.setTextFormat(TextFormat::UnsafeXHTML);
setAccessKey(btnPopup, 'P');
}, "<u>P</u>opup"))};

WTabWidget& _tbwMain{*_lytRoot.addWidget(make_unique<WTabWidget>(), /*stretch*/ 100)};
WMenuItem& _tabA{*_tbwMain.addTab(make_unique<WTableView>(), "A", ContentLoading::Eager)};
WTableView& _tvA{dynamic_cast<WTableView&>(*_tbwMain.widget(_tbwMain.count() - 1))};
WMenuItem& _tabB{*_tbwMain.addTab(make_unique<WTableView>(), "B", ContentLoading::Eager)};
WTableView& _tvB{dynamic_cast<WTableView&>(*_tbwMain.widget(_tbwMain.count() - 1))};

shared_ptr<CFixedTableModel> _mdlAPtr{make_shared<CFixedTableModel>(100, 50)};

WDialog _dlgPopup{};
};

CApplication::CApplication(const WEnvironment& rcEnv)
: CThemedApplication{rcEnv}
, _Server{*environment().server()}
{
setTitle("bug repro " WT_VERSION_STR);

suppressBrowserContextMenu(_cntRoot);

suppressBrowserContextMenu(_dlgPopup);
_dlgPopup.setClosable(true);
_dlgPopup.setResizable(true);
_dlgPopup.setWindowTitle("Popup");
_dlgPopup.keyWentDown().connect([this](const WKeyEvent& e)
{
switch (e.key())
{
default: return;
case Key::Enter:
case Key::Escape: _dlgPopup.reject();
}
});
WHBoxLayout& lytPopup{*_dlgPopup.contents()->setLayout(make_unique<WHBoxLayout>())};
const auto addGroupBoxWithLayout = [](WBoxLayout& lyt, const WString& title) -> WGridLayout&
{
WGroupBox& gbx{*lyt.addWidget(make_unique<WGroupBox>(title))};
WGridLayout& lytGroup{*gbx.setLayout(make_unique<WGridLayout>())};
return lytGroup;
};
const auto addColumn = [&lytPopup](auto&& addWidgets)
{
WContainerWidget& cntCol{*lytPopup.addWidget(make_unique<WContainerWidget>())};
WVBoxLayout& lytCol{*cntCol.setLayout(make_unique<WVBoxLayout>())};

addWidgets(lytCol);

lytCol.addStretch(100);
};
addColumn([&addGroupBoxWithLayout](WVBoxLayout& lytCol)
{
const int vsize{30};
const double minWidth{20};
WGroupBox& gbxTop{*lytCol.addWidget(make_unique<WGroupBox>("Selection"))};
WVBoxLayout& lytTop{*gbxTop.setLayout(make_unique<WVBoxLayout>())};
lytTop.addWidget(create<WSelectionBox>([&] (WSelectionBox& sel)
{
sel.setVerticalSize(vsize);
sel.setMinimumSize({minWidth, LengthUnit::FontEm}, WLength::Auto);
}));

WGridLayout& lytBottom{addGroupBoxWithLayout(lytCol, "Bottom")};
lytBottom.addWidget(make_unique<WCheckBox>("Option 1"), 0, 0, AlignmentFlag::Middle);
lytBottom.addWidget(make_unique<WCheckBox>("Option 2"), 1, 0, AlignmentFlag::Middle);
lytBottom.addWidget(make_unique<WCheckBox>("Option 3"), 2, 0, AlignmentFlag::Middle);
lytBottom.addWidget(make_unique<WRadioButton>("Variant A"), 0, 1, 0, 2, AlignmentFlag::Middle);
lytBottom.addWidget(make_unique<WRadioButton>("Variant B"), 1, 1, 0, 2, AlignmentFlag::Middle);
WContainerWidget& cntInput{*lytBottom.addWidget(make_unique<WContainerWidget>(), 2, 1, 0, 2, AlignmentFlag::Top)};
WHBoxLayout& lytInput{*cntInput.setLayout(make_unique<WHBoxLayout>())};
lytInput.addWidget(make_unique<WLabel>("Name"), 0, AlignmentFlag::Middle);
lytInput.addWidget(make_unique<WLineEdit>(), 0, AlignmentFlag::Middle);
lytInput.addStretch(100);
lytBottom.setRowStretch(2, 100);
});
addColumn([&addGroupBoxWithLayout](WVBoxLayout& lytCol)
{
WGridLayout& lytTop{addGroupBoxWithLayout(lytCol, "Selected")};
lytTop.addWidget(make_unique<WText>("L 1"), 0, 0);
lytTop.addWidget(make_unique<WText>("L 2"), 1, 0);
lytTop.addWidget(make_unique<WText>("L 3"), 2, 0);
lytTop.addWidget(make_unique<WText>("L 4"), 3, 0);
lytTop.addWidget(make_unique<WText>("V 1"), 0, 1);
lytTop.addWidget(make_unique<WText>("V 2"), 1, 1);
lytTop.addWidget(make_unique<WText>("V 3"), 2, 1);
lytTop.addWidget(make_unique<WText>("V 4"), 3, 1);

const int vsize{36};
const double minWidth{10};
WGroupBox& gbxMiddle{*lytCol.addWidget(make_unique<WGroupBox>("Subselection"))};
WVBoxLayout& lytMiddle{*gbxMiddle.setLayout(make_unique<WVBoxLayout>())};
lytMiddle.addWidget(create<WSelectionBox>([&] (WSelectionBox& sel)
{
sel.setVerticalSize(vsize);
sel.setMinimumSize({minWidth, LengthUnit::FontEm}, WLength::Auto);
}));

WGridLayout& lytBottom{addGroupBoxWithLayout(lytCol, "Bottom")};
lytBottom.addWidget(make_unique<WText>("L 1"), 0, 0);
lytBottom.addWidget(make_unique<WText>("L 2"), 1, 0);
lytBottom.addWidget(make_unique<WText>("L 3"), 2, 0);
lytBottom.addWidget(make_unique<WText>("V 1"), 0, 1);
lytBottom.addWidget(make_unique<WText>("V 2"), 1, 1);
lytBottom.addWidget(make_unique<WText>("V 3"), 2, 1);
});

_dlgPopup.setMinimumSize(WLength{40, LengthUnit::FontEm}, WLength::Auto);

const auto fTryAddKeyHandlers = []<typename TWidget>(WDialog& dlg, TWidget* const cpWidget)
{
if (cpWidget == nullptr)
{
return false;
}
TWidget& rWidget{*cpWidget};
rWidget.keyWentDown().connect([&dlg] (const WKeyEvent& rcKeyEvent) { dlg.keyWentDown().emit(rcKeyEvent); });
rWidget.keyWentUp ().connect([&dlg] (const WKeyEvent& rcKeyEvent) { if (rcKeyEvent.key() == Key::Escape) { dlg.escapePressed().emit(); } else { dlg.keyWentUp ().emit(rcKeyEvent); } });
rWidget.keyPressed ().connect([&dlg, cpWidget](const WKeyEvent& rcKeyEvent)
{
switch (rcKeyEvent.key())
{
default:
break;
case Key::Escape: dlg.escapePressed().emit();
break;
case Key::Enter:
{
if (dynamic_cast<WPushButton*>(cpWidget) != nullptr)
{
// Let the WPushButton widget trigger the action
}
#if 0
else if (WRadioButton* const cpRadioButton{dynamic_cast<WRadioButton*>(cpWidget)}; cpRadioButton != nullptr)
{
setChecked(*cpRadioButton);
}
#endif
else
{
dlg.enterPressed().emit();
}
}
break;
} // switch (rcKeyEvent.key())
});
return true;
};
const auto fAddKeyHandlers = [&fTryAddKeyHandlers, this](WWidget* const cpWidget)
{
fTryAddKeyHandlers(_dlgPopup, dynamic_cast<WInteractWidget*>(cpWidget))
|| fTryAddKeyHandlers(_dlgPopup, dynamic_cast<WAbstractItemView*>(cpWidget));
};
lytPopup.iterateWidgets(fAddKeyHandlers);

_dlgPopup.show();

// final action after creating the UI
enableUpdates();
}

int main(int argc, char* argv[])
{
return WRun(argc, argv, [](const WEnvironment& rcEnv)
{
try
{
return make_unique<CApplication>(rcEnv);
}
catch (const std::exception& rcException)
{
cerr << "exception " << typeid(remove_cvref<decltype(rcException)>::type).name() << ": " << rcException.what() << endl;

#if DEBUG
exit(-1);
#endif
throw;
}
});
}
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