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chromium/chromium-114-qt-handle_scale_factor_changes.patch
Than Ngo 802b55bba2 - add qt6 linuxui backend 
- backport: handle scale factor changes
- backport: fix font double_scaling
2023-05-28 10:09:21 +02:00

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commit c51d6447fd0d124903d16bf5952efccbf9e1ca92
Author: Tom Anderson <thomasanderson@chromium.org>
Date: Wed May 24 22:53:20 2023 +0000
[Qt] Handle scale factor changes
This is a speculative fix for https://crbug.com/1439149. I suspect
the scale factor is not set immediately on QT initialization, but
is set asynchronously shortly after. This CL adds a listener for
QT scale changes.
R=thestig
Low-Coverage-Reason: No QT tests currently
Change-Id: I7dea23e16a6bb26237564af2dc4e43480f6aea9f
Bug: 1439149
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4559732
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Auto-Submit: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1148805}
diff --git a/ui/qt/qt5_shim_moc.cc b/ui/qt/qt5_shim_moc.cc
index 8f8b6b57784a8..6e504f23c603a 100644
--- a/ui/qt/qt5_shim_moc.cc
+++ b/ui/qt/qt5_shim_moc.cc
@@ -23,8 +23,8 @@
QT_BEGIN_MOC_NAMESPACE
struct qt_meta_stringdata_qt__QtShim_t {
- QByteArrayData data[6];
- char stringdata[52];
+ QByteArrayData data[13];
+ char stringdata[151];
};
#define QT_MOC_LITERAL(idx, ofs, len) \
Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET( \
@@ -33,9 +33,16 @@ struct qt_meta_stringdata_qt__QtShim_t {
static const qt_meta_stringdata_qt__QtShim_t qt_meta_stringdata_qt__QtShim = {
{QT_MOC_LITERAL(0, 0, 10), QT_MOC_LITERAL(1, 11, 11),
QT_MOC_LITERAL(2, 23, 0), QT_MOC_LITERAL(3, 24, 4),
- QT_MOC_LITERAL(4, 29, 14), QT_MOC_LITERAL(5, 44, 7)},
+ QT_MOC_LITERAL(4, 29, 14), QT_MOC_LITERAL(5, 44, 7),
+ QT_MOC_LITERAL(6, 52, 11), QT_MOC_LITERAL(7, 64, 8),
+ QT_MOC_LITERAL(8, 73, 6), QT_MOC_LITERAL(9, 80, 13),
+ QT_MOC_LITERAL(10, 94, 25), QT_MOC_LITERAL(11, 120, 3),
+ QT_MOC_LITERAL(12, 124, 26)},
"qt::QtShim\0FontChanged\0\0font\0"
- "PaletteChanged\0palette"};
+ "PaletteChanged\0palette\0ScreenAdded\0"
+ "QScreen*\0screen\0ScreenRemoved\0"
+ "LogicalDotsPerInchChanged\0dpi\0"
+ "PhysicalDotsPerInchChanged"};
#undef QT_MOC_LITERAL
static const uint qt_meta_data_qt__QtShim[] = {
@@ -44,7 +51,7 @@ static const uint qt_meta_data_qt__QtShim[] = {
7, // revision
0, // classname
0, 0, // classinfo
- 2, 14, // methods
+ 6, 14, // methods
0, 0, // properties
0, 0, // enums/sets
0, 0, // constructors
@@ -52,11 +59,15 @@ static const uint qt_meta_data_qt__QtShim[] = {
0, // signalCount
// slots: name, argc, parameters, tag, flags
- 1, 1, 24, 2, 0x08 /* Private */, 4, 1, 27, 2, 0x08 /* Private */,
+ 1, 1, 44, 2, 0x08 /* Private */, 4, 1, 47, 2, 0x08 /* Private */, 6, 1, 50,
+ 2, 0x08 /* Private */, 9, 1, 53, 2, 0x08 /* Private */, 10, 1, 56, 2,
+ 0x08 /* Private */, 12, 1, 59, 2, 0x08 /* Private */,
// slots: parameters
QMetaType::Void, QMetaType::QFont, 3, QMetaType::Void, QMetaType::QPalette,
- 5,
+ 5, QMetaType::Void, 0x80000000 | 7, 8, QMetaType::Void, 0x80000000 | 7, 8,
+ QMetaType::Void, QMetaType::QReal, 11, QMetaType::Void, QMetaType::QReal,
+ 11,
0 // eod
};
@@ -74,6 +85,18 @@ void qt::QtShim::qt_static_metacall(QObject* _o,
case 1:
_t->PaletteChanged((*reinterpret_cast<const QPalette(*)>(_a[1])));
break;
+ case 2:
+ _t->ScreenAdded((*reinterpret_cast<QScreen*(*)>(_a[1])));
+ break;
+ case 3:
+ _t->ScreenRemoved((*reinterpret_cast<QScreen*(*)>(_a[1])));
+ break;
+ case 4:
+ _t->LogicalDotsPerInchChanged((*reinterpret_cast<qreal(*)>(_a[1])));
+ break;
+ case 5:
+ _t->PhysicalDotsPerInchChanged((*reinterpret_cast<qreal(*)>(_a[1])));
+ break;
default:;
}
}
@@ -107,15 +130,15 @@ int qt::QtShim::qt_metacall(QMetaObject::Call _c, int _id, void** _a) {
return _id;
}
if (_c == QMetaObject::InvokeMetaMethod) {
- if (_id < 2) {
+ if (_id < 6) {
qt_static_metacall(this, _c, _id, _a);
}
- _id -= 2;
+ _id -= 6;
} else if (_c == QMetaObject::RegisterMethodArgumentMetaType) {
- if (_id < 2) {
+ if (_id < 6) {
*reinterpret_cast<int*>(_a[0]) = -1;
}
- _id -= 2;
+ _id -= 6;
}
return _id;
}
diff --git a/ui/qt/qt6_shim_moc.cc b/ui/qt/qt6_shim_moc.cc
index 6d02ca317b65d..a16515008d892 100644
--- a/ui/qt/qt6_shim_moc.cc
+++ b/ui/qt/qt6_shim_moc.cc
@@ -26,8 +26,8 @@ QT_BEGIN_MOC_NAMESPACE
QT_WARNING_PUSH
QT_WARNING_DISABLE_DEPRECATED
struct qt_meta_stringdata_qt__QtShim_t {
- const uint offsetsAndSize[12];
- char stringdata0[52];
+ const uint offsetsAndSize[26];
+ char stringdata0[151];
};
#define QT_MOC_LITERAL(ofs, len) \
uint(offsetof(qt_meta_stringdata_qt__QtShim_t, stringdata0) + ofs), len
@@ -38,11 +38,21 @@ static const qt_meta_stringdata_qt__QtShim_t qt_meta_stringdata_qt__QtShim = {
QT_MOC_LITERAL(23, 0), // ""
QT_MOC_LITERAL(24, 4), // "font"
QT_MOC_LITERAL(29, 14), // "PaletteChanged"
- QT_MOC_LITERAL(44, 7) // "palette"
+ QT_MOC_LITERAL(44, 7), // "palette"
+ QT_MOC_LITERAL(52, 11), // "ScreenAdded"
+ QT_MOC_LITERAL(64, 8), // "QScreen*"
+ QT_MOC_LITERAL(73, 6), // "screen"
+ QT_MOC_LITERAL(80, 13), // "ScreenRemoved"
+ QT_MOC_LITERAL(94, 25), // "LogicalDotsPerInchChanged"
+ QT_MOC_LITERAL(120, 3), // "dpi"
+ QT_MOC_LITERAL(124, 26) // "PhysicalDotsPerInchChanged"
},
"qt::QtShim\0FontChanged\0\0font\0"
- "PaletteChanged\0palette"};
+ "PaletteChanged\0palette\0ScreenAdded\0"
+ "QScreen*\0screen\0ScreenRemoved\0"
+ "LogicalDotsPerInchChanged\0dpi\0"
+ "PhysicalDotsPerInchChanged"};
#undef QT_MOC_LITERAL
static const uint qt_meta_data_qt__QtShim[] = {
@@ -51,7 +61,7 @@ static const uint qt_meta_data_qt__QtShim[] = {
10, // revision
0, // classname
0, 0, // classinfo
- 2, 14, // methods
+ 6, 14, // methods
0, 0, // properties
0, 0, // enums/sets
0, 0, // constructors
@@ -59,11 +69,15 @@ static const uint qt_meta_data_qt__QtShim[] = {
0, // signalCount
// slots: name, argc, parameters, tag, flags, initial metatype offsets
- 1, 1, 26, 2, 0x08, 1 /* Private */, 4, 1, 29, 2, 0x08, 3 /* Private */,
+ 1, 1, 50, 2, 0x08, 1 /* Private */, 4, 1, 53, 2, 0x08, 3 /* Private */, 6,
+ 1, 56, 2, 0x08, 5 /* Private */, 9, 1, 59, 2, 0x08, 7 /* Private */, 10, 1,
+ 62, 2, 0x08, 9 /* Private */, 12, 1, 65, 2, 0x08, 11 /* Private */,
// slots: parameters
QMetaType::Void, QMetaType::QFont, 3, QMetaType::Void, QMetaType::QPalette,
- 5,
+ 5, QMetaType::Void, 0x80000000 | 7, 8, QMetaType::Void, 0x80000000 | 7, 8,
+ QMetaType::Void, QMetaType::QReal, 11, QMetaType::Void, QMetaType::QReal,
+ 11,
0 // eod
};
@@ -83,6 +97,22 @@ void qt::QtShim::qt_static_metacall(QObject* _o,
_t->PaletteChanged(
(*reinterpret_cast<std::add_pointer_t<QPalette>>(_a[1])));
break;
+ case 2:
+ _t->ScreenAdded(
+ (*reinterpret_cast<std::add_pointer_t<QScreen*>>(_a[1])));
+ break;
+ case 3:
+ _t->ScreenRemoved(
+ (*reinterpret_cast<std::add_pointer_t<QScreen*>>(_a[1])));
+ break;
+ case 4:
+ _t->LogicalDotsPerInchChanged(
+ (*reinterpret_cast<std::add_pointer_t<qreal>>(_a[1])));
+ break;
+ case 5:
+ _t->PhysicalDotsPerInchChanged(
+ (*reinterpret_cast<std::add_pointer_t<qreal>>(_a[1])));
+ break;
default:;
}
}
@@ -98,7 +128,15 @@ const QMetaObject qt::QtShim::staticMetaObject = {
QtPrivate::TypeAndForceComplete<void, std::false_type>,
QtPrivate::TypeAndForceComplete<const QFont&, std::false_type>,
QtPrivate::TypeAndForceComplete<void, std::false_type>,
- QtPrivate::TypeAndForceComplete<const QPalette&, std::false_type>
+ QtPrivate::TypeAndForceComplete<const QPalette&, std::false_type>,
+ QtPrivate::TypeAndForceComplete<void, std::false_type>,
+ QtPrivate::TypeAndForceComplete<QScreen*, std::false_type>,
+ QtPrivate::TypeAndForceComplete<void, std::false_type>,
+ QtPrivate::TypeAndForceComplete<QScreen*, std::false_type>,
+ QtPrivate::TypeAndForceComplete<void, std::false_type>,
+ QtPrivate::TypeAndForceComplete<qreal, std::false_type>,
+ QtPrivate::TypeAndForceComplete<void, std::false_type>,
+ QtPrivate::TypeAndForceComplete<qreal, std::false_type>
>,
nullptr}};
@@ -127,15 +165,15 @@ int qt::QtShim::qt_metacall(QMetaObject::Call _c, int _id, void** _a) {
return _id;
}
if (_c == QMetaObject::InvokeMetaMethod) {
- if (_id < 2) {
+ if (_id < 6) {
qt_static_metacall(this, _c, _id, _a);
}
- _id -= 2;
+ _id -= 6;
} else if (_c == QMetaObject::RegisterMethodArgumentMetaType) {
- if (_id < 2) {
+ if (_id < 6) {
*reinterpret_cast<QMetaType*>(_a[0]) = QMetaType();
}
- _id -= 2;
+ _id -= 6;
}
return _id;
}
diff --git a/ui/qt/qt_interface.h b/ui/qt/qt_interface.h
index 6a362bc66c0e3..28dfc6603544f 100644
--- a/ui/qt/qt_interface.h
+++ b/ui/qt/qt_interface.h
@@ -118,6 +118,7 @@ class QtInterface {
virtual void FontChanged() = 0;
virtual void ThemeChanged() = 0;
+ virtual void ScaleFactorMaybeChanged() = 0;
};
QtInterface() = default;
diff --git a/ui/qt/qt_shim.cc b/ui/qt/qt_shim.cc
index 74d34ad196f18..0aec9c3aed4ad 100644
--- a/ui/qt/qt_shim.cc
+++ b/ui/qt/qt_shim.cc
@@ -16,6 +16,7 @@
#include <QMimeType>
#include <QPainter>
#include <QPalette>
+#include <QScreen>
#include <QStyle>
#include <QStyleOptionTitleBar>
@@ -52,8 +53,9 @@ FontHinting QtHintingToFontHinting(QFont::HintingPreference hinting) {
// Obtain the average color of a gradient.
SkColor GradientColor(const QGradient& gradient) {
QGradientStops stops = gradient.stops();
- if (stops.empty())
+ if (stops.empty()) {
return qRgba(0, 0, 0, 0);
+ }
float a = 0;
float r = 0;
@@ -86,11 +88,13 @@ SkColor GradientColor(const QGradient& gradient) {
// Obtain the average color of a texture.
SkColor TextureColor(QImage image) {
size_t size = image.width() * image.height();
- if (!size)
+ if (!size) {
return qRgba(0, 0, 0, 0);
+ }
- if (image.format() != QImage::Format_ARGB32_Premultiplied)
+ if (image.format() != QImage::Format_ARGB32_Premultiplied) {
image = image.convertToFormat(QImage::Format_ARGB32_Premultiplied);
+ }
size_t a = 0;
size_t r = 0;
@@ -203,6 +207,13 @@ QtShim::QtShim(QtInterface::Delegate* delegate, int* argc, char** argv)
SLOT(FontChanged(const QFont&)));
connect(&app_, SIGNAL(paletteChanged(const QPalette&)), this,
SLOT(PaletteChanged(const QPalette&)));
+ connect(&app_, SIGNAL(screenAdded(QScreen*)), this,
+ SLOT(ScreenAdded(QScreen*)));
+ connect(&app_, SIGNAL(screenRemoved(QScreen*)), this,
+ SLOT(ScreenRemoved(QScreen*)));
+ for (QScreen* screen : app_.screens()) {
+ ScreenAdded(screen);
+ }
}
QtShim::~QtShim() = default;
@@ -241,8 +252,9 @@ Image QtShim::GetIconForContentType(const String& content_type,
auto icon = QIcon::fromTheme(name);
auto pixmap = icon.pixmap(size);
auto image = pixmap.toImage();
- if (image.format() != QImage::Format_ARGB32_Premultiplied)
+ if (image.format() != QImage::Format_ARGB32_Premultiplied) {
image = image.convertToFormat(QImage::Format_ARGB32_Premultiplied);
+ }
if (auto bytes = image.sizeInBytes()) {
return {image.width(), image.height(),
static_cast<float>(image.devicePixelRatio()),
@@ -283,6 +295,30 @@ void QtShim::PaletteChanged(const QPalette& palette) {
delegate_->ThemeChanged();
}
+DISABLE_CFI_VCALL
+void QtShim::ScreenAdded(QScreen* screen) {
+ connect(screen, SIGNAL(logicalDotsPerInchChanged(qreal)), this,
+ SLOT(LogicalDotsPerInchChanged(qreal)));
+ connect(screen, SIGNAL(physicalDotsPerInchChanged(qreal)), this,
+ SLOT(PhysicalDotsPerInchChanged(qreal)));
+ delegate_->ScaleFactorMaybeChanged();
+}
+
+DISABLE_CFI_VCALL
+void QtShim::ScreenRemoved(QScreen* screen) {
+ delegate_->ScaleFactorMaybeChanged();
+}
+
+DISABLE_CFI_VCALL
+void QtShim::LogicalDotsPerInchChanged(qreal dpi) {
+ delegate_->ScaleFactorMaybeChanged();
+}
+
+DISABLE_CFI_VCALL
+void QtShim::PhysicalDotsPerInchChanged(qreal dpi) {
+ delegate_->ScaleFactorMaybeChanged();
+}
+
Image QtShim::DrawHeader(int width,
int height,
SkColor default_color,
@@ -309,8 +345,9 @@ QImage QtShim::DrawHeaderImpl(int width,
QStyleOptionTitleBar opt;
opt.rect = QRect(-kBorderWidth, -kBorderWidth, width + 2 * kBorderWidth,
height + 2 * kBorderWidth);
- if (state == ColorState::kNormal)
+ if (state == ColorState::kNormal) {
opt.titleBarState = QStyle::State_Active;
+ }
app_.style()->drawComplexControl(QStyle::CC_TitleBar, &opt, &painter,
nullptr);
} else {
diff --git a/ui/qt/qt_shim.h b/ui/qt/qt_shim.h
index 607e6fe22dfc0..d979c47d589d4 100644
--- a/ui/qt/qt_shim.h
+++ b/ui/qt/qt_shim.h
@@ -42,6 +42,10 @@ class QtShim : public QObject, public QtInterface {
private slots:
void FontChanged(const QFont& font);
void PaletteChanged(const QPalette& palette);
+ void ScreenAdded(QScreen* screen);
+ void ScreenRemoved(QScreen* screen);
+ void LogicalDotsPerInchChanged(qreal dpi);
+ void PhysicalDotsPerInchChanged(qreal dpi);
private:
QImage DrawHeaderImpl(int width,
diff --git a/ui/qt/qt_ui.cc b/ui/qt/qt_ui.cc
index 6a3b58e9f930b..bac5245a069f9 100644
--- a/ui/qt/qt_ui.cc
+++ b/ui/qt/qt_ui.cc
@@ -19,6 +19,7 @@
#include "base/nix/xdg_util.h"
#include "base/notreached.h"
#include "base/path_service.h"
+#include "base/task/single_thread_task_runner.h"
#include "base/time/time.h"
#include "cc/paint/paint_canvas.h"
#include "chrome/browser/themes/theme_properties.h" // nogncheck
@@ -36,6 +37,7 @@
#include "ui/gfx/image/image.h"
#include "ui/gfx/image/image_skia_rep.h"
#include "ui/gfx/image/image_skia_source.h"
+#include "ui/linux/device_scale_factor_observer.h"
#include "ui/linux/linux_ui.h"
#include "ui/linux/nav_button_provider.h"
#include "ui/native_theme/native_theme_aura.h"
@@ -194,16 +196,21 @@ void QtUi::GetDefaultFontDescription(std::string* family_out,
int* style_out,
int* weight_out,
gfx::FontRenderParams* params_out) const {
- if (family_out)
+ if (family_out) {
*family_out = font_family_;
- if (size_pixels_out)
+ }
+ if (size_pixels_out) {
*size_pixels_out = font_size_pixels_;
- if (style_out)
+ }
+ if (style_out) {
*style_out = font_style_;
- if (weight_out)
+ }
+ if (weight_out) {
*weight_out = font_weight_;
- if (params_out)
+ }
+ if (params_out) {
*params_out = font_params_;
+ }
}
ui::SelectFileDialog* QtUi::CreateSelectFileDialog(
@@ -236,6 +245,7 @@ bool QtUi::Initialize() {
ui::ColorProviderManager::Get().AppendColorProviderInitializer(
base::BindRepeating(&QtUi::AddNativeColorMixer, base::Unretained(this)));
FontChanged();
+ scale_factor_ = shim_->GetScaleFactor();
return true;
}
@@ -246,8 +256,9 @@ ui::NativeTheme* QtUi::GetNativeTheme() const {
bool QtUi::GetColor(int id, SkColor* color, bool use_custom_frame) const {
auto value = GetColor(id, use_custom_frame);
- if (value)
+ if (value) {
*color = *value;
+ }
return value.has_value();
}
@@ -297,8 +308,9 @@ gfx::Image QtUi::GetIconForContentType(const std::string& content_type,
float scale) const {
Image image =
shim_->GetIconForContentType(String(content_type.c_str()), size * scale);
- if (!image.data_argb.size())
+ if (!image.data_argb.size()) {
return {};
+ }
SkImageInfo image_info = SkImageInfo::Make(
image.width, image.height, kBGRA_8888_SkColorType, kPremul_SkAlphaType);
@@ -345,14 +357,16 @@ bool QtUi::AnimationsEnabled() const {
void QtUi::AddWindowButtonOrderObserver(
ui::WindowButtonOrderObserver* observer) {
- if (fallback_linux_ui_)
+ if (fallback_linux_ui_) {
fallback_linux_ui_->AddWindowButtonOrderObserver(observer);
+ }
}
void QtUi::RemoveWindowButtonOrderObserver(
ui::WindowButtonOrderObserver* observer) {
- if (fallback_linux_ui_)
+ if (fallback_linux_ui_) {
fallback_linux_ui_->RemoveWindowButtonOrderObserver(observer);
+ }
}
std::unique_ptr<ui::NavButtonProvider> QtUi::CreateNavButtonProvider() {
@@ -441,11 +455,24 @@ void QtUi::ThemeChanged() {
native_theme_->ThemeChanged(PreferDarkTheme());
}
+void QtUi::ScaleFactorMaybeChanged() {
+ // This gets called whenever the monitor configuration changes. Handle the
+ // scale change asynchronously to allow the change to propagate to QT's scale
+ // factor. This also coalesces scale change events together.
+ if (!scale_factor_task_active_) {
+ scale_factor_task_active_ = true;
+ base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
+ FROM_HERE, base::BindOnce(&QtUi::ScaleFactorMaybeChangedImpl,
+ weak_factory_.GetWeakPtr()));
+ }
+}
+
DISABLE_CFI_VCALL
void QtUi::AddNativeColorMixer(ui::ColorProvider* provider,
const ui::ColorProviderManager::Key& key) {
- if (key.system_theme != ui::SystemTheme::kQt)
+ if (key.system_theme != ui::SystemTheme::kQt) {
return;
+ }
ui::ColorMixer& mixer = provider->AddMixer();
// These color constants are required by native_chrome_color_mixer_linux.cc
@@ -494,8 +521,9 @@ void QtUi::AddNativeColorMixer(ui::ColorProvider* provider,
ColorState::kInactive},
{ui::kColorNativeToolbarBackground, ColorType::kButtonBg},
};
- for (const auto& map : kMaps)
+ for (const auto& map : kMaps) {
mixer[map.id] = {shim_->GetColor(map.role, map.state)};
+ }
const bool use_custom_frame =
key.frame_type == ui::ColorProviderManager::FrameType::kChromium;
@@ -578,6 +606,20 @@ absl::optional<SkColor> QtUi::GetColor(int id, bool use_custom_frame) const {
}
}
+DISABLE_CFI_VCALL
+void QtUi::ScaleFactorMaybeChangedImpl() {
+ scale_factor_task_active_ = false;
+ double scale = shim_->GetScaleFactor();
+ if (scale == scale_factor_) {
+ return;
+ }
+ scale_factor_ = scale;
+ for (ui::DeviceScaleFactorObserver& observer :
+ device_scale_factor_observer_list()) {
+ observer.OnDeviceScaleFactorChanged();
+ }
+}
+
std::unique_ptr<ui::LinuxUiAndTheme> CreateQtUi(
ui::LinuxUi* fallback_linux_ui) {
return std::make_unique<QtUi>(fallback_linux_ui);
diff --git a/ui/qt/qt_ui.h b/ui/qt/qt_ui.h
index b53ed93240708..3319edf1ea9bc 100644
--- a/ui/qt/qt_ui.h
+++ b/ui/qt/qt_ui.h
@@ -8,6 +8,7 @@
#include <memory>
#include "base/component_export.h"
+#include "base/memory/weak_ptr.h"
#include "printing/buildflags/buildflags.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
#include "ui/color/color_provider.h"
@@ -88,11 +89,14 @@ class QtUi : public ui::LinuxUiAndTheme, QtInterface::Delegate {
// QtInterface::Delegate:
void FontChanged() override;
void ThemeChanged() override;
+ void ScaleFactorMaybeChanged() override;
private:
void AddNativeColorMixer(ui::ColorProvider* provider,
const ui::ColorProviderManager::Key& key);
+ void ScaleFactorMaybeChangedImpl();
+
absl::optional<SkColor> GetColor(int id, bool use_custom_frame) const;
// TODO(https://crbug.com/1317782): This is a fallback for any unimplemented
@@ -114,6 +118,11 @@ class QtUi : public ui::LinuxUiAndTheme, QtInterface::Delegate {
std::unique_ptr<QtInterface> shim_;
std::unique_ptr<QtNativeTheme> native_theme_;
+
+ bool scale_factor_task_active_ = false;
+ double scale_factor_ = 1.0;
+
+ base::WeakPtrFactory<QtUi> weak_factory_{this};
};
// This should be the only symbol exported from this component.
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