AUI_LET#
Performs multiple operations on a single object without repeating its name (in place) This function can be used as an operator on object.
| Header: | #include <AUI/Util/kAUI.h> |
| CMake: | aui_link(my_target PUBLIC aui::core) |
Definition#
Detailed Description#
Analogue to with, apply in Kotlin.
AUI_LET allows to call methods of newly created objects right in place. For example:
| without | with |
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It's especially useful when building user interfaces:
| without | with |
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Examples#
examples/app/notes/src/main.cpp
Notes App - Note taking app that demonstrates usage of AListModel, AProperty, user data saving and loading.
},
/// [scrollarea]
AScrollArea::Builder()
.withContents(
AUI_DECLARATIVE_FOR(note, *mNotes, AVerticalLayout) {
observeChangesForDirty(note);
return notePreview(note) AUI_LET {
connect(it->clicked, [this, note] { mCurrentNote = note; });
it& mCurrentNote > [note](AView& view, const _<Note>& currentNote) {
ALOG_DEBUG(LOG_TAG) << "currentNote == note " << currentNote << " == " << note;
examples/ui/views/src/ExampleWindow.cpp
Views Example - All-in-one views building example.
}
}),
_new<ASpacerExpanding>(),
},
AUI_DECLARATIVE_FOR(i, *state->colors, AWordWrappingLayout) {
return Horizontal {
_new<ALabel>(i.toString()) AUI_WITH_STYLE {
TextColor { i.readableBlackOrWhite() },
}
} AUI_WITH_STYLE {
examples/ui/contacts/src/main.cpp
AUI Contacts - Usage of AUI_DECLARATIVE_FOR to make a contacts-like application.
mSelectedContact = nullptr;
}
_<AView> indexedList() {
return AUI_DECLARATIVE_FOR(group, *mContacts | ranges::views::chunk_by([](const _<Contact>& lhs, const _<Contact>& rhs) {
return groupLetter(lhs->displayName) == groupLetter(rhs->displayName);
}), AVerticalLayout) {
auto firstContact = *ranges::begin(group);
auto firstLetter = groupLetter(firstContact->displayName);
ALogger::info("Test") << "Computing view for group " << AString(1, firstLetter);
examples/ui/infinite_lazy_list/src/main.cpp
Infinite Lazy List - Usage of AUI_DECLARATIVE_FOR to make an infinite lazy list.
};
});
return Vertical {
AUI_DECLARATIVE_FOR(i, *state->items, AVerticalLayout) { return Label{} & i->value; },
Centered {
_new<ASpinnerV2>() AUI_LET {
AObject::connect(it->redrawn, AObject::GENERIC_OBSERVER, [state] {
// when a spinner appears, we indicate that we need more items.
state->needMore = true;
examples/ui/backdrop/src/main.cpp
Backdrop - Backdrop effects demo.
auto result = Stacked {
AScrollArea::Builder().withContents(content).build() AUI_WITH_STYLE {
Expanding(),
Padding { 80_dp, 0, 0 },
} AUI_LET { it->setExtraStylesheet(
AStylesheet {
{
t<AScrollAreaViewport>(),
AOverflow::VISIBLE,
},
examples/app/fractal/src/JumpToCoordsWindow.cpp
Fractal Example - Fractal viewer application demonstrating usage of custom shaders.
examples/app/game_of_life/src/main.cpp
Game of Life - Game of Life implementation that uses advanced large dynamic data rendering techniques such as ITexture, AImage to be GPU friendly. The computation is performed in AThreadPool.
GameOfLifeWindow() : AWindow("Game of Life") {
setContents(Vertical {
Centered {
Horizontal {
_new<AButton>("Randomize") AUI_LET {
connect(it->clicked, AUI_SLOT(mCells)::randomize);
},
_new<AButton>() AUI_LET {
it & mCells.isRunning > [](AButton& b, bool isRunning) {
b.setText(isRunning ? "Pause" : "Run");
examples/app/minesweeper/src/NewGameWindow.cpp
Minesweeper Game - Minesweeper game implementation driven by ass.
setContents(Vertical {
_form({
{
"Cells by width:"_as,
mWidth = _new<ANumberPicker>() AUI_LET {
it->setMin(8);
it->setMax(25);
},
},
{
examples/7guis/flight_booker/src/main.cpp
7GUIs Flight Booker - Flight Booker.
auto formatDate(system_clock::time_point date) { return "{0:%d}.{0:%m}.{0:%G}"_format(date); }
auto dateTextField(DateTextFieldState& state) {
return _new<ATextField>() AUI_LET {
AObject::biConnect(
state.parsed.biProjected(aui::lambda_overloaded {
[](const AOptional<system_clock::time_point>& v) -> AString {
if (!v) {
return "";
examples/7guis/cells/src/main.cpp
7GUIs Cells - Spreadsheet processor (Excel).
_new<ATextField>() AUI_WITH_STYLE {
MinSize { 0 },
Margin { 0 },
BorderRadius { 0 },
} AUI_LET {
it && mState->currentExpression;
it->focus();
connect(it->focusLost, me::commitExpression);
});
}
examples/7guis/circle_drawer/src/main.cpp
7GUIs Circle Drawer - Undo, redo, dialog control.
auto radiusPopup = _new<AWindow>(
"", 200_dp, 50_dp, dynamic_cast<AWindow*>(AWindow::current()), WindowStyle::MODAL);
radiusPopup->setContents(Vertical {
Label { "Adjust diameter of circle at {}."_format(circle->position) },
_new<ASlider>() AUI_LET {
it->setValue(circle->radius / MAX_RADIUS);
connect(
it->valueChanging, [this, circle](aui::float_within_0_1 s) {
circle->radius = s * MAX_RADIUS;
mState->circles.notify();
examples/7guis/temperature_converter/src/main.cpp
7GUIs Temperature Converter - Fahrenheit to Celsius and vice versa.
using namespace declarative;
auto myPicker() {
return _new<ANumberPicker>() AUI_LET {
it->setMin(-999);
it->setMax(999);
};
}
examples/7guis/counter/src/main.cpp
7GUIs Counter - Simple counter.
public:
CounterWindow(): AWindow("AUI - 7GUIs - Counter", 200_dp, 100_dp) {
setContents(Centered {
Horizontal {
_new<ATextField>() AUI_LET {
AObject::connect(mCounter.readProjected(AString::number<int>), it->text());
it->setEditable(false);
},
Button { "Count" }.connect(&AView::clicked, [&] { mCounter += 1; }),
},
examples/7guis/timer/src/main.cpp
7GUIs Timer - Timer example.
Vertical::Expanding {
Horizontal {
Label { "Elapsed Time:" },
Centered::Expanding {
_new<AProgressBar>() AUI_LET {
it & mElapsedTimeRatio;
it->setCustomStyle({ Expanding { 1, 0 } });
},
},
},
Examples#
examples/ui/contacts/src/view/ContactDetailsView.cpp
AUI Contacts - Usage of AUI_DECLARATIVE_FOR to make a contacts-like application.
}),
Centered {
Horizontal::Expanding {
SpacerExpanding(),
Button { mEditorMode ? "Discard" : "Delete" } AUI_LET { connect(it->clicked, me::drop); },
Button { mEditorMode ? "Done" : "Edit" } AUI_LET { connect(it->clicked, me::toggleEdit); },
} AUI_WITH_STYLE { MaxSize(EDITOR_CONTENT_MAX_WIDTH, {}), Padding(4_dp) },
},
});
});
examples/app/fractal/src/FractalWindow.cpp
Fractal Example - Fractal viewer application demonstrating usage of custom shaders.
_new<AButton>("Jump to coords...")
.connect(&AButton::clicked, this, [&, fractal]() { _new<JumpToCoordsWindow>(fractal, this)->show(); }),
_new<ALabel>("Iterations:"),
_new<ANumberPicker>().connect(
&ANumberPicker::valueChanged, this, [fractal](int v) { fractal->setIterations(v); }) AUI_LET {
it->setMax(1000);
it->setValue(350);
},
},
});