tdesktop/Telegram/SourceFiles/ui/widgets/labels.h

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/*
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.
2015-10-03 13:16:42 +00:00
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
2016-02-08 10:56:18 +00:00
Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
*/
#pragma once
#include "styles/style_widgets.h"
namespace Ui {
class PopupMenu;
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class CrossFadeAnimation {
public:
CrossFadeAnimation(const style::color &bg);
struct Part {
QPixmap snapshot;
QPoint position;
};
void addLine(Part was, Part now);
void paintFrame(Painter &p, float64 dt) {
auto progress = anim::linear(1., dt);
paintFrame(p, progress, 1. - progress, progress);
}
void paintFrame(Painter &p, float64 positionReady, float64 alphaWas, float64 alphaNow);
private:
struct Line {
Line(Part was, Part now) : was(std_::move(was)), now(std_::move(now)) {
}
Part was;
Part now;
};
void paintLine(Painter &p, const Line &line, float64 positionReady, float64 alphaWas, float64 alphaNow);
const style::color &_bg;
QList<Line> _lines;
};
class LabelSimple : public TWidget {
public:
LabelSimple(QWidget *parent, const style::LabelSimple &st = st::defaultLabelSimple, const QString &value = QString());
// This method also resizes the label.
void setText(const QString &newText, bool *outTextChanged = nullptr);
protected:
void paintEvent(QPaintEvent *e) override;
private:
QString _fullText;
int _fullTextWidth;
QString _text;
int _textWidth;
const style::LabelSimple &_st;
};
class FlatLabel : public TWidget, public ClickHandlerHost {
Q_OBJECT
public:
FlatLabel(QWidget *parent, const style::FlatLabel &st = st::defaultFlatLabel, const style::TextStyle &tst = st::defaultTextStyle);
enum class InitType {
Simple,
Rich,
};
FlatLabel(QWidget *parent, const QString &text, InitType initType, const style::FlatLabel &st = st::defaultFlatLabel, const style::TextStyle &tst = st::defaultTextStyle);
void setOpacity(float64 o);
void setText(const QString &text);
void setRichText(const QString &text);
void setMarkedText(const TextWithEntities &textWithEntities);
void setSelectable(bool selectable);
void setDoubleClickSelectsParagraph(bool doubleClickSelectsParagraph);
void setContextCopyText(const QString &copyText);
void setExpandLinksMode(ExpandLinksMode mode);
void setBreakEverywhere(bool breakEverywhere);
int naturalWidth() const override;
void setLink(uint16 lnkIndex, const ClickHandlerPtr &lnk);
using ClickHandlerHook = base::lambda<bool(const ClickHandlerPtr&, Qt::MouseButton)>;
void setClickHandlerHook(ClickHandlerHook &&hook);
// ClickHandlerHost interface
void clickHandlerActiveChanged(const ClickHandlerPtr &action, bool active) override;
void clickHandlerPressedChanged(const ClickHandlerPtr &action, bool pressed) override;
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static std_::unique_ptr<CrossFadeAnimation> CrossFade(FlatLabel *from, FlatLabel *to, const style::color &bg, QPoint fromPosition = QPoint(), QPoint toPosition = QPoint());
protected:
void paintEvent(QPaintEvent *e) override;
void mouseMoveEvent(QMouseEvent *e) override;
void mousePressEvent(QMouseEvent *e) override;
void mouseReleaseEvent(QMouseEvent *e) override;
void mouseDoubleClickEvent(QMouseEvent *e) override;
void enterEvent(QEvent *e) override;
void leaveEvent(QEvent *e) override;
void focusOutEvent(QFocusEvent *e) override;
void focusInEvent(QFocusEvent *e) override;
void keyPressEvent(QKeyEvent *e) override;
void contextMenuEvent(QContextMenuEvent *e) override;
bool event(QEvent *e) override; // calls touchEvent when necessary
void touchEvent(QTouchEvent *e);
int resizeGetHeight(int newWidth) override;
private slots:
void onCopySelectedText();
void onCopyContextText();
void onCopyContextUrl();
void onTouchSelect();
void onContextMenuDestroy(QObject *obj);
void onExecuteDrag();
private:
void init();
template <typename SetCallback>
void setTextByCallback(SetCallback callback);
Text::StateResult dragActionUpdate();
Text::StateResult dragActionStart(const QPoint &p, Qt::MouseButton button);
Text::StateResult dragActionFinish(const QPoint &p, Qt::MouseButton button);
void updateHover(const Text::StateResult &state);
Text::StateResult getTextState(const QPoint &m) const;
void refreshCursor(bool uponSymbol);
int countTextWidth() const;
int countTextHeight(int textWidth);
void refreshSize();
enum class ContextMenuReason {
FromEvent,
FromTouch,
};
void showContextMenu(QContextMenuEvent *e, ContextMenuReason reason);
Text _text;
const style::FlatLabel &_st;
const style::TextStyle &_tst;
float64 _opacity = 1.;
int _allowedWidth = 0;
int _fullTextHeight = 0;
bool _breakEverywhere = false;
style::cursor _cursor = style::cur_default;
bool _selectable = false;
TextSelection _selection, _savedSelection;
TextSelectType _selectionType = TextSelectType::Letters;
bool _doubleClickSelectsParagraph = false;
enum DragAction {
NoDrag = 0x00,
PrepareDrag = 0x01,
Dragging = 0x02,
Selecting = 0x04,
};
DragAction _dragAction = NoDrag;
QPoint _dragStartPosition;
uint16 _dragSymbol = 0;
bool _dragWasInactive = false;
QPoint _lastMousePos;
QPoint _trippleClickPoint;
QTimer _trippleClickTimer;
Ui::PopupMenu *_contextMenu = nullptr;
ClickHandlerPtr _contextMenuClickHandler;
QString _contextCopyText;
ExpandLinksMode _contextExpandLinksMode = ExpandLinksAll;
ClickHandlerHook _clickHandlerHook;
// text selection and context menu by touch support (at least Windows Surface tablets)
bool _touchSelect = false;
bool _touchInProgress = false;
QPoint _touchStart, _touchPrevPos, _touchPos;
QTimer _touchSelectTimer;
};
} // namespace Ui