148 lines
4.6 KiB
C++
148 lines
4.6 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
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*/
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#pragma once
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class FlatLabel : public TWidget, public ClickHandlerHost {
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Q_OBJECT
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public:
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FlatLabel(QWidget *parent, const style::flatLabel &st = st::labelDefFlat, const style::textStyle &tst = st::defaultTextStyle);
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enum class InitType {
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Simple,
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Rich,
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};
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FlatLabel(QWidget *parent, const QString &text, InitType initType, const style::flatLabel &st = st::labelDefFlat, const style::textStyle &tst = st::defaultTextStyle);
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void setOpacity(float64 o);
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void setText(const QString &text);
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void setRichText(const QString &text);
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void setMarkedText(const TextWithEntities &textWithEntities);
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void setSelectable(bool selectable);
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void setDoubleClickSelectsParagraph(bool doubleClickSelectsParagraph);
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void setContextCopyText(const QString ©Text);
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void setExpandLinksMode(ExpandLinksMode mode);
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void setBreakEverywhere(bool breakEverywhere);
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void resizeToWidth(int32 width);
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int naturalWidth() const;
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void setLink(uint16 lnkIndex, const ClickHandlerPtr &lnk);
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using ClickHandlerHook = Function<bool, const ClickHandlerPtr &, Qt::MouseButton>;
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void setClickHandlerHook(ClickHandlerHook &&hook);
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// ClickHandlerHost interface
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void clickHandlerActiveChanged(const ClickHandlerPtr &action, bool active) override;
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void clickHandlerPressedChanged(const ClickHandlerPtr &action, bool pressed) override;
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protected:
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void paintEvent(QPaintEvent *e) override;
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void mouseMoveEvent(QMouseEvent *e) override;
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void mousePressEvent(QMouseEvent *e) override;
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void mouseReleaseEvent(QMouseEvent *e) override;
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void mouseDoubleClickEvent(QMouseEvent *e) override;
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void enterEvent(QEvent *e) override;
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void leaveEvent(QEvent *e) override;
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void focusOutEvent(QFocusEvent *e) override;
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void focusInEvent(QFocusEvent *e) override;
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void keyPressEvent(QKeyEvent *e) override;
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void contextMenuEvent(QContextMenuEvent *e) override;
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bool event(QEvent *e) override; // calls touchEvent when necessary
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void touchEvent(QTouchEvent *e);
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private slots:
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void onCopySelectedText();
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void onCopyContextText();
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void onCopyContextUrl();
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void onTouchSelect();
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void onContextMenuDestroy(QObject *obj);
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void onExecuteDrag();
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private:
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void init();
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Text::StateResult dragActionUpdate();
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Text::StateResult dragActionStart(const QPoint &p, Qt::MouseButton button);
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Text::StateResult dragActionFinish(const QPoint &p, Qt::MouseButton button);
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void updateHover(const Text::StateResult &state);
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Text::StateResult getTextState(const QPoint &m) const;
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void refreshCursor(bool uponSymbol);
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int countTextWidth() const;
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int countTextHeight(int textWidth);
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void refreshSize();
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enum class ContextMenuReason {
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FromEvent,
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FromTouch,
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};
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void showContextMenu(QContextMenuEvent *e, ContextMenuReason reason);
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Text _text;
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style::flatLabel _st;
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style::textStyle _tst;
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float64 _opacity = 1.;
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int _allowedWidth = 0;
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int _fullTextHeight = 0;
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bool _breakEverywhere = false;
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style::cursor _cursor = style::cur_default;
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bool _selectable = false;
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TextSelection _selection, _savedSelection;
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TextSelectType _selectionType = TextSelectType::Letters;
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bool _doubleClickSelectsParagraph = false;
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enum DragAction {
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NoDrag = 0x00,
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PrepareDrag = 0x01,
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Dragging = 0x02,
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Selecting = 0x04,
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};
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DragAction _dragAction = NoDrag;
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QPoint _dragStartPosition;
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uint16 _dragSymbol = 0;
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bool _dragWasInactive = false;
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QPoint _lastMousePos;
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QPoint _trippleClickPoint;
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QTimer _trippleClickTimer;
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PopupMenu *_contextMenu = nullptr;
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ClickHandlerPtr _contextMenuClickHandler;
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QString _contextCopyText;
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ExpandLinksMode _contextExpandLinksMode = ExpandLinksAll;
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ClickHandlerHook _clickHandlerHook;
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// text selection and context menu by touch support (at least Windows Surface tablets)
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bool _touchSelect = false;
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bool _touchInProgress = false;
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QPoint _touchStart, _touchPrevPos, _touchPos;
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QTimer _touchSelectTimer;
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};
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