tdesktop/Telegram/SourceFiles/ui/twidget.h

379 lines
12 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) 2014-2016 John Preston, https://desktop.telegram.org
*/
#pragma once
namespace App {
const QPixmap &sprite();
}
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 drawSprite(int x, int y, const style::sprite &sprite) {
return drawPixmap(QPoint(x, y), App::sprite(), sprite.rect());
}
void drawSprite(const QPoint &p, const style::sprite &sprite) {
return drawPixmap(p, App::sprite(), sprite.rect());
}
void drawSpriteLeft(int x, int y, int outerw, const style::sprite &sprite) {
return drawPixmapLeft(x, y, outerw, App::sprite(), sprite.rect());
}
void drawSpriteLeft(const QPoint &p, int outerw, const style::sprite &sprite) {
return drawPixmapLeft(p, outerw, App::sprite(), sprite.rect());
}
void drawSpriteLeft(int x, int y, int w, int h, int outerw, const style::sprite &sprite) {
return drawPixmapLeft(x, y, w, h, outerw, App::sprite(), sprite.rect());
}
void drawSpriteLeft(const QRect &r, int outerw, const style::sprite &sprite) {
return drawPixmapLeft(r, outerw, App::sprite(), sprite.rect());
}
void drawSpriteRight(int x, int y, int outerw, const style::sprite &sprite) {
return drawPixmapRight(x, y, outerw, App::sprite(), sprite.rect());
}
void drawSpriteRight(const QPoint &p, int outerw, const style::sprite &sprite) {
return drawPixmapRight(p, outerw, App::sprite(), sprite.rect());
}
void drawSpriteRight(int x, int y, int w, int h, int outerw, const style::sprite &sprite) {
return drawPixmapRight(x, y, w, h, outerw, App::sprite(), sprite.rect());
}
void drawSpriteRight(const QRect &r, int outerw, const style::sprite &sprite) {
return drawPixmapRight(r, outerw, App::sprite(), sprite.rect());
}
void drawSpriteCenter(const QRect &in, const style::sprite &sprite) {
return drawPixmap(QPoint(in.x() + (in.width() - sprite.pxWidth()) / 2, in.y() + (in.height() - sprite.pxHeight()) / 2), App::sprite(), sprite.rect());
}
void drawSpriteCenterLeft(const QRect &in, int outerw, const style::sprite &sprite) {
return drawPixmapLeft(QPoint(in.x() + (in.width() - sprite.pxWidth()) / 2, in.y() + (in.height() - sprite.pxHeight()) / 2), outerw, App::sprite(), sprite.rect());
}
void drawSpriteCenterRight(const QRect &in, int outerw, const style::sprite &sprite) {
return drawPixmapRight(QPoint(in.x() + (in.width() - sprite.pxWidth()) / 2, in.y() + (in.height() - sprite.pxHeight()) / 2), outerw, App::sprite(), sprite.rect());
}
};
#define T_WIDGET public: \
TWidget *tparent() { \
return qobject_cast<TWidget*>(parentWidget()); \
} \
const TWidget *tparent() const { \
return qobject_cast<const TWidget*>(parentWidget()); \
} \
virtual void leaveToChildEvent(QEvent *e, QWidget *child) { /* e -- from enterEvent() of child TWidget */ \
} \
virtual void enterFromChildEvent(QEvent *e, QWidget *child) { /* e -- from leaveEvent() of child TWidget */ \
} \
void moveToLeft(int x, int y, int outerw = 0) { \
move(rtl() ? ((outerw > 0 ? outerw : parentWidget()->width()) - x - width()) : x, y); \
} \
void moveToRight(int x, int y, int outerw = 0) { \
move(rtl() ? x : ((outerw > 0 ? outerw : parentWidget()->width()) - x - width()), y); \
} \
QPoint myrtlpoint(int x, int y) const { \
return rtlpoint(x, y, width()); \
} \
QPoint myrtlpoint(const QPoint p) const { \
return rtlpoint(p, width()); \
} \
QRect myrtlrect(int x, int y, int w, int h) const { \
return rtlrect(x, y, w, h, width()); \
} \
QRect myrtlrect(const QRect &r) { \
return rtlrect(r, width()); \
} \
void rtlupdate(const QRect &r) { \
update(myrtlrect(r)); \
} \
void rtlupdate(int x, int y, int w, int h) { \
update(myrtlrect(x, y, w, h)); \
} \
protected: \
void enterEvent(QEvent *e) override { \
TWidget *p(tparent()); \
if (p) p->leaveToChildEvent(e, this); \
return enterEventHook(e); \
} \
void leaveEvent(QEvent *e) override { \
TWidget *p(tparent()); \
if (p) p->enterFromChildEvent(e, this); \
return leaveEventHook(e); \
}
class TWidget : public QWidget {
Q_OBJECT
T_WIDGET
public:
TWidget(QWidget *parent = nullptr) : QWidget(parent) {
}
bool event(QEvent *e) override {
return QWidget::event(e);
}
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();
}
}
}
QPointer<TWidget> weakThis() {
return QPointer<TWidget>(this);
}
QPointer<const TWidget> weakThis() const {
return QPointer<const TWidget>(this);
}
// 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 newSize = QSize(newWidth, resizeGetHeight(newWidth));
if (newSize != size()) {
resize(newSize);
update();
}
}
protected:
void enterEventHook(QEvent *e) {
return QWidget::enterEvent(e);
}
void leaveEventHook(QEvent *e) {
return QWidget::leaveEvent(e);
}
// Resizes content and counts natural widget height for the desired width.
virtual int resizeGetHeight(int newWidth) {
return height();
}
};
void myEnsureResized(QWidget *target);
QPixmap myGrab(TWidget *target, QRect rect = QRect());
class PlainShadow : public TWidget {
public:
PlainShadow(QWidget *parent, const style::color &color) : TWidget(parent), _color(color) {
}
protected:
void paintEvent(QPaintEvent *e) override {
Painter(this).fillRect(e->rect(), _color->b);
}
private:
const style::color &_color;
};
class ToggleableShadow : public TWidget {
public:
ToggleableShadow(QWidget *parent, const style::color &color) : TWidget(parent), _color(color) {
}
enum class Mode {
Shown,
ShownFast,
Hidden,
HiddenFast
};
void setMode(Mode mode);
bool isFullyShown() const {
return _shown && !_a_opacity.animating();
}
protected:
void paintEvent(QPaintEvent *e) override;
private:
const style::color &_color;
FloatAnimation _a_opacity;
bool _shown = true;
};
class SingleDelayedCall : public QObject {
Q_OBJECT
public:
SingleDelayedCall(QObject *parent, const char *member) : QObject(parent), _member(member) {
}
void call() {
if (_pending.testAndSetOrdered(0, 1)) {
QMetaObject::invokeMethod(this, "makeDelayedCall", Qt::QueuedConnection);
}
}
private slots:
void makeDelayedCall() {
if (_pending.testAndSetOrdered(1, 0)) {
QMetaObject::invokeMethod(parent(), _member);
}
}
private:
QAtomicInt _pending = { 0 };
const char *_member;
};
// A simple wrap around T* to explicitly state ownership
template <typename T>
class ChildWidget {
public:
ChildWidget(std_::nullptr_t) : _widget(nullptr) {
}
// No default constructor, but constructors with at least
// one argument are simply make functions.
template <typename Parent, typename... Args>
ChildWidget(Parent &&parent, Args&&... args) : _widget(new T(std_::forward<Parent>(parent), std_::forward<Args>(args)...)) {
}
ChildWidget(const ChildWidget<T> &other) = delete;
ChildWidget<T> &operator=(const ChildWidget<T> &other) = delete;
ChildWidget<T> &operator=(std_::nullptr_t) {
_widget = nullptr;
return *this;
}
ChildWidget<T> &operator=(T *widget) {
_widget = widget;
return *this;
}
T *operator->() const {
return _widget;
}
T &operator*() const {
return *_widget;
}
// So we can pass this pointer to methods like connect().
T *ptr() const {
return _widget;
}
operator T*() const {
return ptr();
}
// Use that instead "= new T(parent, ...)"
template <typename Parent, typename... Args>
void create(Parent &&parent, Args&&... args) {
delete _widget;
_widget = new T(std_::forward<Parent>(parent), std_::forward<Args>(args)...);
}
void destroy() {
if (_widget) {
delete _widget;
_widget = nullptr;
}
}
void destroyDelayed() {
if (_widget) {
_widget->hide();
_widget->deleteLater();
_widget = nullptr;
}
}
private:
T *_widget;
};
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());
}