tdesktop/Telegram/SourceFiles/ui/twidget.h

458 lines
13 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#pragma once
namespace Fonts {
void start();
}
class Painter : public QPainter {
public:
explicit Painter(QPaintDevice *device) : QPainter(device) {
}
void drawTextLeft(int x, int y, int outerw, const QString &text, int textWidth = -1) {
QFontMetrics m(fontMetrics());
if (rtl() && textWidth < 0) textWidth = m.width(text);
drawText(rtl() ? (outerw - x - textWidth) : x, y + m.ascent(), text);
}
void drawTextRight(int x, int y, int outerw, const QString &text, int textWidth = -1) {
QFontMetrics m(fontMetrics());
if (!rtl() && textWidth < 0) textWidth = m.width(text);
drawText(rtl() ? x : (outerw - x - textWidth), y + m.ascent(), text);
}
void drawPixmapLeft(int x, int y, int outerw, const QPixmap &pix, const QRect &from) {
drawPixmap(QPoint(rtl() ? (outerw - x - (from.width() / pix.devicePixelRatio())) : x, y), pix, from);
}
void drawPixmapLeft(const QPoint &p, int outerw, const QPixmap &pix, const QRect &from) {
return drawPixmapLeft(p.x(), p.y(), outerw, pix, from);
}
void drawPixmapLeft(int x, int y, int w, int h, int outerw, const QPixmap &pix, const QRect &from) {
drawPixmap(QRect(rtl() ? (outerw - x - w) : x, y, w, h), pix, from);
}
void drawPixmapLeft(const QRect &r, int outerw, const QPixmap &pix, const QRect &from) {
return drawPixmapLeft(r.x(), r.y(), r.width(), r.height(), outerw, pix, from);
}
void drawPixmapLeft(int x, int y, int outerw, const QPixmap &pix) {
drawPixmap(QPoint(rtl() ? (outerw - x - (pix.width() / pix.devicePixelRatio())) : x, y), pix);
}
void drawPixmapLeft(const QPoint &p, int outerw, const QPixmap &pix) {
return drawPixmapLeft(p.x(), p.y(), outerw, pix);
}
void drawPixmapRight(int x, int y, int outerw, const QPixmap &pix, const QRect &from) {
drawPixmap(QPoint(rtl() ? x : (outerw - x - (from.width() / pix.devicePixelRatio())), y), pix, from);
}
void drawPixmapRight(const QPoint &p, int outerw, const QPixmap &pix, const QRect &from) {
return drawPixmapRight(p.x(), p.y(), outerw, pix, from);
}
void drawPixmapRight(int x, int y, int w, int h, int outerw, const QPixmap &pix, const QRect &from) {
drawPixmap(QRect(rtl() ? x : (outerw - x - w), y, w, h), pix, from);
}
void drawPixmapRight(const QRect &r, int outerw, const QPixmap &pix, const QRect &from) {
return drawPixmapRight(r.x(), r.y(), r.width(), r.height(), outerw, pix, from);
}
void drawPixmapRight(int x, int y, int outerw, const QPixmap &pix) {
drawPixmap(QPoint(rtl() ? x : (outerw - x - (pix.width() / pix.devicePixelRatio())), y), pix);
}
void drawPixmapRight(const QPoint &p, int outerw, const QPixmap &pix) {
return drawPixmapRight(p.x(), p.y(), outerw, pix);
}
void setTextPalette(const style::TextPalette &palette) {
_textPalette = &palette;
}
void restoreTextPalette() {
_textPalette = nullptr;
}
const style::TextPalette &textPalette() const {
return _textPalette ? *_textPalette : st::defaultTextPalette;
}
private:
const style::TextPalette *_textPalette = nullptr;
};
class PainterHighQualityEnabler {
public:
PainterHighQualityEnabler(Painter &p) : _painter(p) {
static constexpr QPainter::RenderHint Hints[] = {
QPainter::Antialiasing,
QPainter::SmoothPixmapTransform,
QPainter::TextAntialiasing,
QPainter::HighQualityAntialiasing
};
auto hints = _painter.renderHints();
for_const (auto hint, Hints) {
if (!(hints & hint)) {
_hints |= hint;
}
}
if (_hints) {
_painter.setRenderHints(_hints);
}
}
PainterHighQualityEnabler(const PainterHighQualityEnabler &other) = delete;
PainterHighQualityEnabler &operator=(const PainterHighQualityEnabler &other) = delete;
~PainterHighQualityEnabler() {
if (_hints) {
_painter.setRenderHints(_hints, false);
}
}
private:
Painter &_painter;
QPainter::RenderHints _hints = 0;
};
class TWidget;
template <typename Base>
class TWidgetHelper : public Base {
public:
using Base::Base;
virtual QMargins getMargins() const {
return QMargins();
}
void moveToLeft(int x, int y, int outerw = 0) {
auto margins = getMargins();
x -= margins.left();
y -= margins.top();
Base::move(rtl() ? ((outerw > 0 ? outerw : Base::parentWidget()->width()) - x - Base::width()) : x, y);
}
void moveToRight(int x, int y, int outerw = 0) {
auto margins = getMargins();
x -= margins.right();
y -= margins.top();
Base::move(rtl() ? x : ((outerw > 0 ? outerw : Base::parentWidget()->width()) - x - Base::width()), y);
}
void setGeometryToLeft(int x, int y, int w, int h, int outerw = 0) {
auto margins = getMargins();
x -= margins.left();
y -= margins.top();
w -= margins.left() - margins.right();
h -= margins.top() - margins.bottom();
Base::setGeometry(rtl() ? ((outerw > 0 ? outerw : Base::parentWidget()->width()) - x - w) : x, y, w, h);
}
void setGeometryToRight(int x, int y, int w, int h, int outerw = 0) {
auto margins = getMargins();
x -= margins.right();
y -= margins.top();
w -= margins.left() - margins.right();
h -= margins.top() - margins.bottom();
Base::setGeometry(rtl() ? x : ((outerw > 0 ? outerw : Base::parentWidget()->width()) - x - w), y, w, h);
}
QPoint myrtlpoint(int x, int y) const {
return rtlpoint(x, y, Base::width());
}
QPoint myrtlpoint(const QPoint p) const {
return rtlpoint(p, Base::width());
}
QRect myrtlrect(int x, int y, int w, int h) const {
return rtlrect(x, y, w, h, Base::width());
}
QRect myrtlrect(const QRect &r) const {
return rtlrect(r, Base::width());
}
void rtlupdate(const QRect &r) {
Base::update(myrtlrect(r));
}
void rtlupdate(int x, int y, int w, int h) {
Base::update(myrtlrect(x, y, w, h));
}
protected:
void enterEvent(QEvent *e) final override {
if (auto parent = tparent()) {
parent->leaveToChildEvent(e, this);
}
return enterEventHook(e);
}
virtual void enterEventHook(QEvent *e) {
return Base::enterEvent(e);
}
void leaveEvent(QEvent *e) final override {
if (auto parent = tparent()) {
parent->enterFromChildEvent(e, this);
}
return leaveEventHook(e);
}
virtual void leaveEventHook(QEvent *e) {
return Base::leaveEvent(e);
}
// e - from enterEvent() of child TWidget
virtual void leaveToChildEvent(QEvent *e, QWidget *child) {
}
// e - from leaveEvent() of child TWidget
virtual void enterFromChildEvent(QEvent *e, QWidget *child) {
}
private:
TWidget *tparent() {
return qobject_cast<TWidget*>(Base::parentWidget());
}
const TWidget *tparent() const {
return qobject_cast<const TWidget*>(Base::parentWidget());
}
template <typename OtherBase>
friend class TWidgetHelper;
};
class TWidget : public TWidgetHelper<QWidget> {
Q_OBJECT
public:
TWidget(QWidget *parent = nullptr) : TWidgetHelper<QWidget>(parent) {
}
virtual void grabStart() {
}
virtual void grabFinish() {
}
bool inFocusChain() const;
void hideChildren() {
for (auto child : children()) {
if (auto widget = qobject_cast<QWidget*>(child)) {
widget->hide();
}
}
}
void showChildren() {
for (auto child : children()) {
if (auto widget = qobject_cast<QWidget*>(child)) {
widget->show();
}
}
}
// Get the size of the widget as it should be.
// Negative return value means no default width.
virtual int naturalWidth() const {
return -1;
}
// Count new height for width=newWidth and resize to it.
void resizeToWidth(int newWidth) {
auto margins = getMargins();
auto fullWidth = margins.left() + newWidth + margins.right();
auto fullHeight = margins.top() + resizeGetHeight(newWidth) + margins.bottom();
auto newSize = QSize(fullWidth, fullHeight);
if (newSize != size()) {
resize(newSize);
update();
}
}
// Resize to minimum of natural width and available width.
void resizeToNaturalWidth(int newWidth) {
auto maxWidth = naturalWidth();
resizeToWidth((maxWidth >= 0) ? qMin(newWidth, maxWidth) : newWidth);
}
QRect rectNoMargins() const {
return rect().marginsRemoved(getMargins());
}
int widthNoMargins() const {
return rectNoMargins().width();
}
int heightNoMargins() const {
return rectNoMargins().height();
}
int bottomNoMargins() const {
auto rectWithoutMargins = rectNoMargins();
return y() + rectWithoutMargins.y() + rectWithoutMargins.height();
}
QSize sizeNoMargins() const {
return rectNoMargins().size();
}
// Updates the area that is visible inside the scroll container.
virtual void setVisibleTopBottom(int visibleTop, int visibleBottom) {
}
signals:
// Child widget is responsible for emitting this signal.
void heightUpdated();
protected:
// Resizes content and counts natural widget height for the desired width.
virtual int resizeGetHeight(int newWidth) {
return height();
}
};
template <typename Widget>
QPointer<Widget> weak(Widget *object) {
return QPointer<Widget>(object);
}
template <typename Widget>
QPointer<const Widget> weak(const Widget *object) {
return QPointer<const Widget>(object);
}
void myEnsureResized(QWidget *target);
QPixmap myGrab(TWidget *target, QRect rect = QRect(), QColor bg = QColor(255, 255, 255, 0));
QImage myGrabImage(TWidget *target, QRect rect = QRect(), QColor bg = QColor(255, 255, 255, 0));
class SingleQueuedInvokation : public QObject {
public:
SingleQueuedInvokation(base::lambda<void()> callback) : _callback(callback) {
}
void call() {
if (_pending.testAndSetAcquire(0, 1)) {
InvokeQueued(this, [this] {
if (_pending.testAndSetRelease(1, 0)) {
_callback();
}
});
}
}
private:
base::lambda<void()> _callback;
QAtomicInt _pending = { 0 };
};
// Smart pointer for QObject*, has move semantics, destroys object if it doesn't have a parent.
template <typename Object>
class object_ptr {
public:
object_ptr(std::nullptr_t) {
}
// No default constructor, but constructors with at least
// one argument are simply make functions.
template <typename Parent, typename... Args>
explicit object_ptr(Parent &&parent, Args&&... args) : _object(new Object(std::forward<Parent>(parent), std::forward<Args>(args)...)) {
}
object_ptr(const object_ptr &other) = delete;
object_ptr &operator=(const object_ptr &other) = delete;
object_ptr(object_ptr &&other) : _object(base::take(other._object)) {
}
object_ptr &operator=(object_ptr &&other) {
auto temp = std::move(other);
destroy();
std::swap(_object, temp._object);
return *this;
}
template <typename OtherObject, typename = std::enable_if_t<std::is_base_of<Object, OtherObject>::value>>
object_ptr(object_ptr<OtherObject> &&other) : _object(base::take(other._object)) {
}
template <typename OtherObject, typename = std::enable_if_t<std::is_base_of<Object, OtherObject>::value>>
object_ptr &operator=(object_ptr<OtherObject> &&other) {
_object = base::take(other._object);
return *this;
}
object_ptr &operator=(std::nullptr_t) {
_object = nullptr;
return *this;
}
// So we can pass this pointer to methods like connect().
Object *data() const {
return static_cast<Object*>(_object);
}
operator Object*() const {
return data();
}
explicit operator bool() const {
return _object != nullptr;
}
Object *operator->() const {
return data();
}
Object &operator*() const {
return *data();
}
// Use that instead "= new Object(parent, ...)"
template <typename Parent, typename... Args>
void create(Parent &&parent, Args&&... args) {
destroy();
_object = new Object(std::forward<Parent>(parent), std::forward<Args>(args)...);
}
void destroy() {
delete base::take(_object);
}
void destroyDelayed() {
if (_object) {
if (auto widget = base::up_cast<QWidget*>(data())) {
widget->hide();
}
base::take(_object)->deleteLater();
}
}
~object_ptr() {
if (auto pointer = _object) {
if (!pointer->parent()) {
destroy();
}
}
}
template <typename ResultType, typename SourceType>
friend object_ptr<ResultType> static_object_cast(object_ptr<SourceType> source);
private:
template <typename OtherObject>
friend class object_ptr;
QObject *_object = nullptr;
};
template <typename ResultType, typename SourceType>
inline object_ptr<ResultType> static_object_cast(object_ptr<SourceType> source) {
auto result = object_ptr<ResultType>(nullptr);
result._object = static_cast<ResultType*>(base::take(source._object));
return std::move(result);
}
void sendSynteticMouseEvent(QWidget *widget, QEvent::Type type, Qt::MouseButton button, const QPoint &globalPoint);
inline void sendSynteticMouseEvent(QWidget *widget, QEvent::Type type, Qt::MouseButton button) {
return sendSynteticMouseEvent(widget, type, button, QCursor::pos());
}