tdesktop/Telegram/SourceFiles/window/window_title_qt.cpp

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/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#include "window/window_title_qt.h"
#include "platform/platform_specific.h"
#include "ui/widgets/buttons.h"
#include "ui/widgets/shadow.h"
#include "core/core_settings.h"
#include "core/application.h"
#include "styles/style_window.h"
#include "base/call_delayed.h"
#include <QtGui/QGuiApplication>
#include <QtGui/QWindow>
namespace Window {
namespace {
// If we toggle frameless window hint in maximized window, and
// show it back too quickly, the mouse position inside the window
// won't be correct (from Qt-s point of view) until we Alt-Tab from
// that window. If we show the window back with this delay it works.
constexpr auto kShowAfterFramelessToggleDelay = crl::time(1000);
} // namespace
TitleWidgetQt::TitleWidgetQt(QWidget *parent)
: TitleWidget(parent)
, _st(st::defaultWindowTitle)
, _minimize(this, _st.minimize)
, _maximizeRestore(this, _st.maximize)
, _close(this, _st.close)
, _shadow(this, st::titleShadow)
, _maximizedState(parent->window()->windowState() & Qt::WindowMaximized) {
_minimize->setClickedCallback([=] {
window()->setWindowState(
window()->windowState() | Qt::WindowMinimized);
_minimize->clearState();
});
_minimize->setPointerCursor(false);
_maximizeRestore->setClickedCallback([=] {
window()->setWindowState(_maximizedState
? Qt::WindowNoState
: Qt::WindowMaximized);
_maximizeRestore->clearState();
});
_maximizeRestore->setPointerCursor(false);
_close->setClickedCallback([=] {
window()->close();
_close->clearState();
});
_close->setPointerCursor(false);
Core::App().settings().windowControlsLayoutChanges(
) | rpl::start_with_next([=] {
updateControlsPosition();
}, lifetime());
QCoreApplication::instance()->installEventFilter(this);
_windowWasFrameless = (window()->windowFlags() & Qt::FramelessWindowHint) != 0;
if (!_windowWasFrameless) {
toggleFramelessWindow(true);
}
setAttribute(Qt::WA_OpaquePaintEvent);
resize(width(), _st.height);
}
TitleWidgetQt::~TitleWidgetQt() {
restoreCursor();
if (!_windowWasFrameless) {
toggleFramelessWindow(false);
}
}
void TitleWidgetQt::toggleFramelessWindow(bool enabled) {
// setWindowFlag calls setParent(parentWidget(), newFlags), which
// always calls hide() explicitly, we have to show() the window back.
const auto top = window();
const auto hidden = top->isHidden();
top->setWindowFlag(Qt::FramelessWindowHint, enabled);
if (!hidden) {
base::call_delayed(
kShowAfterFramelessToggleDelay,
top,
[=] { top->show(); });
}
}
void TitleWidgetQt::init() {
connect(
window()->windowHandle(),
&QWindow::windowStateChanged,
this,
[=](Qt::WindowState state) { windowStateChanged(state); });
_maximizedState = (window()->windowState() & Qt::WindowMaximized);
_activeState = isActiveWindow();
updateButtonsState();
}
void TitleWidgetQt::paintEvent(QPaintEvent *e) {
auto active = isActiveWindow();
if (_activeState != active) {
_activeState = active;
updateButtonsState();
}
Painter(this).fillRect(rect(), active ? _st.bgActive : _st.bg);
}
void TitleWidgetQt::updateControlsPosition() {
const auto controlsLayout = Core::App().settings().windowControlsLayout();
const auto controlsLeft = controlsLayout.left;
const auto controlsRight = controlsLayout.right;
if (ranges::contains(controlsLeft, Control::Minimize)
|| ranges::contains(controlsRight, Control::Minimize)) {
_minimize->show();
} else {
_minimize->hide();
}
if (ranges::contains(controlsLeft, Control::Maximize)
|| ranges::contains(controlsRight, Control::Maximize)) {
_maximizeRestore->show();
} else {
_maximizeRestore->hide();
}
if (ranges::contains(controlsLeft, Control::Close)
|| ranges::contains(controlsRight, Control::Close)) {
_close->show();
} else {
_close->hide();
}
updateControlsPositionBySide(controlsLeft, false);
updateControlsPositionBySide(controlsRight, true);
}
void TitleWidgetQt::updateControlsPositionBySide(
const std::vector<Control> &controls,
bool right) {
const auto preparedControls = right
? (ranges::view::reverse(controls) | ranges::to_vector)
: controls;
auto position = 0;
for (const auto &control : preparedControls) {
switch (control) {
case Control::Minimize:
if (right) {
_minimize->moveToRight(position, 0);
} else {
_minimize->moveToLeft(position, 0);
}
position += _minimize->width();
break;
case Control::Maximize:
if (right) {
_maximizeRestore->moveToRight(position, 0);
} else {
_maximizeRestore->moveToLeft(position, 0);
}
position += _maximizeRestore->width();
break;
case Control::Close:
if (right) {
_close->moveToRight(position, 0);
} else {
_close->moveToLeft(position, 0);
}
position += _close->width();
break;
}
}
}
void TitleWidgetQt::resizeEvent(QResizeEvent *e) {
updateControlsPosition();
_shadow->setGeometry(0, height() - st::lineWidth, width(), st::lineWidth);
}
void TitleWidgetQt::mousePressEvent(QMouseEvent *e) {
if (e->button() != Qt::LeftButton) {
return;
}
startMove();
}
void TitleWidgetQt::mouseDoubleClickEvent(QMouseEvent *e) {
if (window()->windowState() == Qt::WindowMaximized) {
window()->setWindowState(Qt::WindowNoState);
} else {
window()->setWindowState(Qt::WindowMaximized);
}
}
bool TitleWidgetQt::eventFilter(QObject *obj, QEvent *e) {
if (e->type() == QEvent::MouseMove
|| e->type() == QEvent::MouseButtonPress) {
if (window()->isAncestorOf(static_cast<QWidget*>(obj))) {
const auto mouseEvent = static_cast<QMouseEvent*>(e);
const auto edges = edgesFromPos(mouseEvent->windowPos().toPoint());
if (e->type() == QEvent::MouseMove) {
updateCursor(edges);
}
if (e->type() == QEvent::MouseButtonPress
&& mouseEvent->button() == Qt::LeftButton
&& window()->windowState() != Qt::WindowMaximized) {
return startResize(edges);
}
}
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} else if (e->type() == QEvent::Leave) {
if (window() == static_cast<QWidget*>(obj)) {
restoreCursor();
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}
}
return TitleWidget::eventFilter(obj, e);
}
void TitleWidgetQt::windowStateChanged(Qt::WindowState state) {
if (state == Qt::WindowMinimized) {
return;
}
const auto maximized = (state == Qt::WindowMaximized);
if (_maximizedState != maximized) {
_maximizedState = maximized;
updateButtonsState();
}
}
void TitleWidgetQt::updateButtonsState() {
_minimize->setIconOverride(_activeState
? &_st.minimizeIconActive
: nullptr,
_activeState
? &_st.minimizeIconActiveOver
: nullptr);
if (_maximizedState) {
_maximizeRestore->setIconOverride(
_activeState
? &_st.restoreIconActive : &_st.restoreIcon,
_activeState
? &_st.restoreIconActiveOver
: &_st.restoreIconOver);
} else {
_maximizeRestore->setIconOverride(_activeState
? &_st.maximizeIconActive
: nullptr,
_activeState
? &_st.maximizeIconActiveOver
: nullptr);
}
_close->setIconOverride(_activeState
? &_st.closeIconActive
: nullptr,
_activeState
? &_st.closeIconActiveOver
: nullptr);
}
Qt::Edges TitleWidgetQt::edgesFromPos(const QPoint &pos) {
if (pos.x() <= st::windowResizeArea) {
if (pos.y() <= st::windowResizeArea) {
return Qt::LeftEdge | Qt::TopEdge;
} else if (pos.y() >= (window()->height() - st::windowResizeArea)) {
return Qt::LeftEdge | Qt::BottomEdge;
}
return Qt::LeftEdge;
} else if (pos.x() >= (window()->width() - st::windowResizeArea)) {
if (pos.y() <= st::windowResizeArea) {
return Qt::RightEdge | Qt::TopEdge;
} else if (pos.y() >= (window()->height() - st::windowResizeArea)) {
return Qt::RightEdge | Qt::BottomEdge;
}
return Qt::RightEdge;
} else if (pos.y() <= st::windowResizeArea) {
return Qt::TopEdge;
} else if (pos.y() >= (window()->height() - st::windowResizeArea)) {
return Qt::BottomEdge;
} else {
return 0;
}
}
void TitleWidgetQt::restoreCursor() {
if (_cursorOverriden) {
_cursorOverriden = false;
QGuiApplication::restoreOverrideCursor();
}
}
void TitleWidgetQt::updateCursor(Qt::Edges edges) {
if (!edges || window()->windowState() == Qt::WindowMaximized) {
restoreCursor();
return;
} else if (!QGuiApplication::overrideCursor()) {
_cursorOverriden = false;
}
if (!_cursorOverriden) {
_cursorOverriden = true;
QGuiApplication::setOverrideCursor(QCursor());
}
if (((edges & Qt::LeftEdge) && (edges & Qt::TopEdge))
|| ((edges & Qt::RightEdge) && (edges & Qt::BottomEdge))) {
QGuiApplication::changeOverrideCursor(QCursor(Qt::SizeFDiagCursor));
} else if (((edges & Qt::LeftEdge) && (edges & Qt::BottomEdge))
|| ((edges & Qt::RightEdge) && (edges & Qt::TopEdge))) {
QGuiApplication::changeOverrideCursor(QCursor(Qt::SizeBDiagCursor));
} else if ((edges & Qt::LeftEdge) || (edges & Qt::RightEdge)) {
QGuiApplication::changeOverrideCursor(QCursor(Qt::SizeHorCursor));
} else if ((edges & Qt::TopEdge) || (edges & Qt::BottomEdge)) {
QGuiApplication::changeOverrideCursor(QCursor(Qt::SizeVerCursor));
}
}
bool TitleWidgetQt::startMove() {
if (Platform::StartSystemMove(window()->windowHandle())) {
return true;
}
#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0) || defined DESKTOP_APP_QT_PATCHED
if (window()->windowHandle()->startSystemMove()) {
return true;
}
#endif // Qt >= 5.15 || DESKTOP_APP_QT_PATCHED
return false;
}
bool TitleWidgetQt::startResize(Qt::Edges edges) {
if (edges) {
if (Platform::StartSystemResize(window()->windowHandle(), edges)) {
return true;
}
#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0) || defined DESKTOP_APP_QT_PATCHED
if (window()->windowHandle()->startSystemResize(edges)) {
return true;
}
#endif // Qt >= 5.15 || DESKTOP_APP_QT_PATCHED
}
return false;
}
} // namespace Window