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| -rw-r--r-- | include/vcl/ctrl.hxx | 239 |
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diff --git a/include/vcl/ctrl.hxx b/include/vcl/ctrl.hxx new file mode 100644 index 000000000..a6797cc73 --- /dev/null +++ b/include/vcl/ctrl.hxx @@ -0,0 +1,239 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#ifndef INCLUDED_VCL_CTRL_HXX +#define INCLUDED_VCL_CTRL_HXX + +#include <rtl/ustring.hxx> +#include <tools/link.hxx> +#include <tools/gen.hxx> +#include <vcl/dllapi.h> +#include <vcl/window.hxx> +#include <optional> +#include <vector> + +// forward +class StyleSettings; +class Control; + +namespace vcl +{ + +struct VCL_DLLPUBLIC ControlLayoutData +{ + // contains the string really displayed + // there must be exactly one bounding rectangle in m_aUnicodeBoundRects + // for every character in m_aDisplayText + OUString m_aDisplayText; + // the bounding rectangle of every character + // where one character may consist of many glyphs + std::vector< tools::Rectangle > m_aUnicodeBoundRects; + // start indices of lines + std::vector< tools::Long > m_aLineIndices; + // notify parent control on destruction + VclPtr<const Control> m_pParent; + + ControlLayoutData(); + ~ControlLayoutData(); + + tools::Rectangle GetCharacterBounds( tools::Long nIndex ) const; + // returns the character index for corresponding to rPoint (in control coordinates) + // -1 is returned if no character is at that point + tools::Long GetIndexForPoint( const Point& rPoint ) const; + // returns the number of lines in the result of GetDisplayText() + tools::Long GetLineCount() const; + // returns the interval [start,end] of line nLine + // returns [-1,-1] for an invalid line + ::Pair GetLineStartEnd( tools::Long nLine ) const; + /** ToRelativeLineIndex changes a layout data index to a count relative to its line. + + This is equivalent to getting the line start/end pairs with + GetLineStartEnd until the index lies within [start,end] of a line + + @param nIndex + the absolute index inside the display text to be changed to a relative index + + @returns + the relative index inside the displayed line or -1 if the absolute index does + not match any line + */ + tools::Long ToRelativeLineIndex( tools::Long nIndex ) const; +}; + +} // namespace vcl + +class VCL_DLLPUBLIC Control : public vcl::Window +{ +protected: + mutable std::optional<vcl::ControlLayoutData> mxLayoutData; + VclPtr<OutputDevice> mpReferenceDevice; + +private: + bool mbHasControlFocus; + bool mbShowAccelerator; + Link<Control&,void> maLoseFocusHdl; + + SAL_DLLPRIVATE void ImplInitControlData(); + + Control (const Control &) = delete; + Control & operator= (const Control &) = delete; + +protected: + Control( WindowType nType ); + virtual void FillLayoutData() const; + + // helper method for composite controls + void AppendLayoutData( const Control& rSubControl ) const; + + /// creates the mpData->mpLayoutData structure + void CreateLayoutData() const; + /// determines whether we currently have layout data + bool HasLayoutData() const; + + /** this calls both our event listeners, and a specified handler + + If the Control instance is destroyed during any of those calls, the + method properly handles this (in particular, it doesn't crash :) + + @param nEvent + the event to notify to our event listeners + @param callHandler + the lambda function that calls the handler + @return + if the Control instance has been destroyed in any of the call + */ + bool ImplCallEventListenersAndHandler( + VclEventId nEvent, std::function<void()> const & callHandler + ); + + void CallEventListeners( VclEventId nEvent, void* pData = nullptr ); + + /** draws the given text onto the given device + + If no reference device is set, the draw request will simply be forwarded to OutputDevice::DrawText. Otherwise, + the text will be rendered according to the metrics at the reference device. + + return will contain the result of a GetTextRect call (either directly + at the target device, or taking the reference device into account) when + returning. + */ + tools::Rectangle DrawControlText( OutputDevice& _rTargetDevice, const tools::Rectangle& _rRect, + const OUString& _rStr, DrawTextFlags _nStyle, + std::vector< tools::Rectangle >* _pVector, OUString* _pDisplayText, + const Size* i_pDeviceSize = nullptr ) const; + + tools::Rectangle GetControlTextRect( OutputDevice& _rTargetDevice, const tools::Rectangle & rRect, + const OUString& _rStr, DrawTextFlags _nStyle, + Size* o_pDeviceSize = nullptr ) const; + + virtual const vcl::Font& + GetCanonicalFont( const StyleSettings& _rStyle ) const; + virtual const Color& + GetCanonicalTextColor( const StyleSettings& _rStyle ) const; + + void ImplInitSettings(); + + virtual void ApplySettings(vcl::RenderContext& rRenderContext) override; + +public: + SAL_DLLPRIVATE void ImplClearLayoutData() const; + /** draws a frame around the give rectangle, onto the given device + + only to be used from within the Window::Draw method of your sub class. + + The frame is always drawn with a single line (without 3D effects). In addition, any mono + color set at the control's settings is respected. Yet more additionally, if we're living + in a themed desktop, this theming is ignored. + + Note that this makes sense, since the *only known* clients of Window::Draw + are form controls, when printed or print-previewed. For form controls embedded in office documents, + you don't want to have the theme look. + + @param pDev + the device to draw onto + @param rRect + the rect for drawing the frame. Upon returning from the call, the rect will be inflated + by the space occupied by the drawn pixels. + */ + SAL_DLLPRIVATE void ImplDrawFrame( OutputDevice* pDev, tools::Rectangle& rRect ); + +public: + explicit Control( vcl::Window* pParent, WinBits nWinStyle = 0 ); + virtual ~Control() override; + virtual void dispose() override; + + virtual void EnableRTL ( bool bEnable = true ) override; + + virtual bool EventNotify( NotifyEvent& rNEvt ) override; + virtual void StateChanged( StateChangedType nStateChange ) override; + virtual void Resize() override; + + // invalidates layout data + virtual void SetText( const OUString& rStr ) override; + // gets the displayed text + virtual OUString GetDisplayText() const override; + // returns the bounding box for the character at index nIndex (in control coordinates) + tools::Rectangle GetCharacterBounds( tools::Long nIndex ) const; + // returns the character index for corresponding to rPoint (in control coordinates) + // -1 is returned if no character is at that point + tools::Long GetIndexForPoint( const Point& rPoint ) const; + // returns the interval [start,end] of line nLine + // returns [-1,-1] for an invalid line + Pair GetLineStartEnd( tools::Long nLine ) const; + /** ToRelativeLineIndex changes a layout data index to a count relative to its line. + + This is equivalent to getting the line start/end pairs with + GetLineStartEnd() until the index lies within [start,end] of a line + + @param nIndex + the absolute index inside the display text to be changed to a relative index + + @returns + the relative index inside the displayed line or -1 if the absolute index does + not match any line + */ + tools::Long ToRelativeLineIndex( tools::Long nIndex ) const; + + void SetLoseFocusHdl( const Link<Control&,void>& rLink ) { maLoseFocusHdl = rLink; } + + /** determines whether the control currently has the focus + */ + bool HasControlFocus() const { return mbHasControlFocus; } + + void SetLayoutDataParent( const Control* pParent ) const; + + virtual Size GetOptimalSize() const override; + + /** sets a reference device used for rendering control text + @see DrawControlText + */ + void SetReferenceDevice( OutputDevice* _referenceDevice ); + OutputDevice* GetReferenceDevice() const; + + vcl::Font GetUnzoomedControlPointFont() const; + void SetShowAccelerator (bool val); + + void LogicMouseButtonDown(const MouseEvent& rMouseEvent) override; + void LogicMouseButtonUp(const MouseEvent& rMouseEvent) override; + void LogicMouseMove(const MouseEvent& rMouseEvent) override; +}; + +#endif // INCLUDED_VCL_CTRL_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |