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Diffstat (limited to 'vcl/source/window/seleng.cxx')
| -rw-r--r-- | vcl/source/window/seleng.cxx | 411 |
1 files changed, 411 insertions, 0 deletions
diff --git a/vcl/source/window/seleng.cxx b/vcl/source/window/seleng.cxx new file mode 100644 index 000000000..41d0d5f89 --- /dev/null +++ b/vcl/source/window/seleng.cxx @@ -0,0 +1,411 @@ +/* -*- 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 . + */ + +#include <vcl/commandevent.hxx> +#include <vcl/window.hxx> +#include <vcl/seleng.hxx> +#include <comphelper/lok.hxx> +#include <sal/log.hxx> + +FunctionSet::~FunctionSet() +{ +} + +inline bool SelectionEngine::ShouldDeselect( bool bModifierKey1 ) const +{ + return eSelMode != SelectionMode::Multiple || !bModifierKey1; +} + +// TODO: throw out FunctionSet::SelectAtPoint + +SelectionEngine::SelectionEngine( vcl::Window* pWindow, FunctionSet* pFuncSet ) : + pWin( pWindow ), + nUpdateInterval( SELENG_AUTOREPEAT_INTERVAL ) +{ + eSelMode = SelectionMode::Single; + pFunctionSet = pFuncSet; + nFlags = SelectionEngineFlags::EXPANDONMOVE; + nLockedMods = 0; + + aWTimer.SetInvokeHandler( LINK( this, SelectionEngine, ImpWatchDog ) ); + aWTimer.SetTimeout( nUpdateInterval ); + aWTimer.SetDebugName( "vcl::SelectionEngine aWTimer" ); +} + +SelectionEngine::~SelectionEngine() +{ + aWTimer.Stop(); +} + +IMPL_LINK_NOARG(SelectionEngine, ImpWatchDog, Timer *, void) +{ + if ( !aArea.IsInside( aLastMove.GetPosPixel() ) ) + SelMouseMove( aLastMove ); +} + +void SelectionEngine::SetSelectionMode( SelectionMode eMode ) +{ + eSelMode = eMode; +} + +void SelectionEngine::CursorPosChanging( bool bShift, bool bMod1 ) +{ + if ( !pFunctionSet ) + return; + + if ( bShift && eSelMode != SelectionMode::Single ) + { + if ( IsAddMode() ) + { + if ( !(nFlags & SelectionEngineFlags::HAS_ANCH) ) + { + pFunctionSet->CreateAnchor(); + nFlags |= SelectionEngineFlags::HAS_ANCH; + } + } + else + { + if ( !(nFlags & SelectionEngineFlags::HAS_ANCH) ) + { + if( ShouldDeselect( bMod1 ) ) + pFunctionSet->DeselectAll(); + pFunctionSet->CreateAnchor(); + nFlags |= SelectionEngineFlags::HAS_ANCH; + } + } + } + else + { + if ( IsAddMode() ) + { + if ( nFlags & SelectionEngineFlags::HAS_ANCH ) + { + // pFunctionSet->CreateCursor(); + pFunctionSet->DestroyAnchor(); + nFlags &= ~SelectionEngineFlags::HAS_ANCH; + } + } + else + { + if( ShouldDeselect( bMod1 ) ) + pFunctionSet->DeselectAll(); + else + pFunctionSet->DestroyAnchor(); + nFlags &= ~SelectionEngineFlags::HAS_ANCH; + } + } +} + +bool SelectionEngine::SelMouseButtonDown( const MouseEvent& rMEvt ) +{ + nFlags &= ~SelectionEngineFlags::CMDEVT; + if ( !pFunctionSet || rMEvt.GetClicks() > 1 ) + return false; + + sal_uInt16 nModifier = rMEvt.GetModifier() | nLockedMods; + bool nSwap = comphelper::LibreOfficeKit::isActive() && (nModifier & KEY_MOD1) && (nModifier & KEY_MOD2); + + if ( !nSwap && (nModifier & KEY_MOD2) ) + return false; + // in SingleSelection: filter Control-Key, + // so that a D&D can be also started with a Ctrl-Click + if ( nModifier == KEY_MOD1 && eSelMode == SelectionMode::Single ) + nModifier = 0; + + Point aPos = rMEvt.GetPosPixel(); + aLastMove = rMEvt; + + if( !rMEvt.IsRight() ) + { + CaptureMouse(); + nFlags |= SelectionEngineFlags::IN_SEL; + } + else + { + nModifier = 0; + } + + if (nSwap) + { + pFunctionSet->CreateAnchor(); + pFunctionSet->SetCursorAtPoint( aPos ); + return true; + } + + switch ( nModifier ) + { + case 0: // KEY_NO_KEY + { + bool bSelAtPoint = pFunctionSet->IsSelectionAtPoint( aPos ); + nFlags &= ~SelectionEngineFlags::IN_ADD; + if ( (nFlags & SelectionEngineFlags::DRG_ENAB) && bSelAtPoint ) + { + nFlags |= SelectionEngineFlags::WAIT_UPEVT; + nFlags &= ~SelectionEngineFlags::IN_SEL; + ReleaseMouse(); + return true; // wait for STARTDRAG-Command-Event + } + if ( eSelMode != SelectionMode::Single ) + { + if( !IsAddMode() ) + pFunctionSet->DeselectAll(); + else + pFunctionSet->DestroyAnchor(); + nFlags &= ~SelectionEngineFlags::HAS_ANCH; // bHasAnchor = false; + } + pFunctionSet->SetCursorAtPoint( aPos ); + // special case Single-Selection, to enable simple Select+Drag + if (eSelMode == SelectionMode::Single && (nFlags & SelectionEngineFlags::DRG_ENAB)) + nFlags |= SelectionEngineFlags::WAIT_UPEVT; + return true; + } + + case KEY_SHIFT: + if ( eSelMode == SelectionMode::Single ) + { + ReleaseMouse(); + nFlags &= ~SelectionEngineFlags::IN_SEL; + return false; + } + if ( nFlags & SelectionEngineFlags::ADD_ALW ) + nFlags |= SelectionEngineFlags::IN_ADD; + else + nFlags &= ~SelectionEngineFlags::IN_ADD; + + if( !(nFlags & SelectionEngineFlags::HAS_ANCH) ) + { + if ( !(nFlags & SelectionEngineFlags::IN_ADD) ) + pFunctionSet->DeselectAll(); + pFunctionSet->CreateAnchor(); + nFlags |= SelectionEngineFlags::HAS_ANCH; + } + pFunctionSet->SetCursorAtPoint( aPos ); + return true; + + case KEY_MOD1: + // allow Control only for Multi-Select + if ( eSelMode != SelectionMode::Multiple ) + { + nFlags &= ~SelectionEngineFlags::IN_SEL; + ReleaseMouse(); + return true; // skip Mouse-Click + } + if ( nFlags & SelectionEngineFlags::HAS_ANCH ) + { + // pFunctionSet->CreateCursor(); + pFunctionSet->DestroyAnchor(); + nFlags &= ~SelectionEngineFlags::HAS_ANCH; + } + if ( pFunctionSet->IsSelectionAtPoint( aPos ) ) + { + pFunctionSet->DeselectAtPoint( aPos ); + pFunctionSet->SetCursorAtPoint( aPos, true ); + } + else + { + pFunctionSet->SetCursorAtPoint( aPos ); + } + return true; + + case KEY_SHIFT + KEY_MOD1: + if ( eSelMode != SelectionMode::Multiple ) + { + ReleaseMouse(); + nFlags &= ~SelectionEngineFlags::IN_SEL; + return false; + } + nFlags |= SelectionEngineFlags::IN_ADD; //bIsInAddMode = true; + if ( !(nFlags & SelectionEngineFlags::HAS_ANCH) ) + { + pFunctionSet->CreateAnchor(); + nFlags |= SelectionEngineFlags::HAS_ANCH; + } + pFunctionSet->SetCursorAtPoint( aPos ); + return true; + } + + return false; +} + +bool SelectionEngine::SelMouseButtonUp( const MouseEvent& rMEvt ) +{ + aWTimer.Stop(); + if (!pFunctionSet) + { + const SelectionEngineFlags nMask = SelectionEngineFlags::CMDEVT | SelectionEngineFlags::WAIT_UPEVT | SelectionEngineFlags::IN_SEL; + nFlags &= ~nMask; + return false; + } + + if (!rMEvt.IsRight()) + ReleaseMouse(); + + if( (nFlags & SelectionEngineFlags::WAIT_UPEVT) && !(nFlags & SelectionEngineFlags::CMDEVT) && + eSelMode != SelectionMode::Single) + { + // MouseButtonDown in Sel but no CommandEvent yet + // ==> deselect + sal_uInt16 nModifier = aLastMove.GetModifier() | nLockedMods; + if( nModifier == KEY_MOD1 || IsAlwaysAdding() ) + { + if( !(nModifier & KEY_SHIFT) ) + { + pFunctionSet->DestroyAnchor(); + nFlags &= ~SelectionEngineFlags::HAS_ANCH; // uncheck anchor + } + pFunctionSet->DeselectAtPoint( aLastMove.GetPosPixel() ); + nFlags &= ~SelectionEngineFlags::HAS_ANCH; // uncheck anchor + pFunctionSet->SetCursorAtPoint( aLastMove.GetPosPixel(), true ); + } + else + { + pFunctionSet->DeselectAll(); + nFlags &= ~SelectionEngineFlags::HAS_ANCH; // uncheck anchor + pFunctionSet->SetCursorAtPoint( aLastMove.GetPosPixel() ); + } + } + + const SelectionEngineFlags nMask = SelectionEngineFlags::CMDEVT | SelectionEngineFlags::WAIT_UPEVT | SelectionEngineFlags::IN_SEL; + nFlags &= ~nMask; + return true; +} + +void SelectionEngine::ReleaseMouse() +{ + if (!pWin || !pWin->IsMouseCaptured()) + return; + pWin->ReleaseMouse(); +} + +void SelectionEngine::CaptureMouse() +{ + if (!pWin || pWin->IsMouseCaptured()) + return; + pWin->CaptureMouse(); +} + +bool SelectionEngine::SelMouseMove( const MouseEvent& rMEvt ) +{ + + if ( !pFunctionSet || !(nFlags & SelectionEngineFlags::IN_SEL) || + (nFlags & (SelectionEngineFlags::CMDEVT | SelectionEngineFlags::WAIT_UPEVT)) ) + return false; + + if( !(nFlags & SelectionEngineFlags::EXPANDONMOVE) ) + return false; // wait for DragEvent! + + aLastMove = rMEvt; + // if the mouse is outside the area, the frequency of + // SetCursorAtPoint() is only set by the Timer + if( aWTimer.IsActive() && !aArea.IsInside( rMEvt.GetPosPixel() )) + return true; + + aWTimer.SetTimeout( nUpdateInterval ); + if (!comphelper::LibreOfficeKit::isActive()) + // Generating fake mouse moves does not work with LOK. + aWTimer.Start(); + if ( eSelMode != SelectionMode::Single ) + { + if ( !(nFlags & SelectionEngineFlags::HAS_ANCH) ) + { + pFunctionSet->CreateAnchor(); + nFlags |= SelectionEngineFlags::HAS_ANCH; + } + } + + pFunctionSet->SetCursorAtPoint( rMEvt.GetPosPixel() ); + + return true; +} + +void SelectionEngine::SetWindow( vcl::Window* pNewWin ) +{ + if( pNewWin != pWin ) + { + if (nFlags & SelectionEngineFlags::IN_SEL) + ReleaseMouse(); + pWin = pNewWin; + if (nFlags & SelectionEngineFlags::IN_SEL) + CaptureMouse(); + } +} + +void SelectionEngine::Reset() +{ + aWTimer.Stop(); + if (nFlags & SelectionEngineFlags::IN_SEL) + ReleaseMouse(); + nFlags &= ~SelectionEngineFlags(SelectionEngineFlags::HAS_ANCH | SelectionEngineFlags::IN_SEL); + nLockedMods = 0; +} + +void SelectionEngine::Command( const CommandEvent& rCEvt ) +{ + // Timer aWTimer is active during enlarging a selection + if ( !pFunctionSet || aWTimer.IsActive() ) + return; + aWTimer.Stop(); + if ( rCEvt.GetCommand() == CommandEventId::StartDrag ) + { + nFlags |= SelectionEngineFlags::CMDEVT; + if ( nFlags & SelectionEngineFlags::DRG_ENAB ) + { + SAL_WARN_IF( !rCEvt.IsMouseEvent(), "vcl", "STARTDRAG: Not a MouseEvent" ); + if ( pFunctionSet->IsSelectionAtPoint( rCEvt.GetMousePosPixel() ) ) + { + aLastMove = MouseEvent( rCEvt.GetMousePosPixel(), + aLastMove.GetClicks(), aLastMove.GetMode(), + aLastMove.GetButtons(), aLastMove.GetModifier() ); + pFunctionSet->BeginDrag(); + const SelectionEngineFlags nMask = SelectionEngineFlags::CMDEVT|SelectionEngineFlags::WAIT_UPEVT|SelectionEngineFlags::IN_SEL; + nFlags &= ~nMask; + } + else + nFlags &= ~SelectionEngineFlags::CMDEVT; + } + else + nFlags &= ~SelectionEngineFlags::CMDEVT; + } +} + +void SelectionEngine::SetUpdateInterval( sal_uLong nInterval ) +{ + if (nInterval < SELENG_AUTOREPEAT_INTERVAL_MIN) + // Set a lower threshold. On Windows, setting this value too low + // would cause selection to get updated indefinitely. + nInterval = SELENG_AUTOREPEAT_INTERVAL_MIN; + + if (nUpdateInterval == nInterval) + // no update needed. + return; + + if (aWTimer.IsActive()) + { + // reset the timer right away on interval change. + aWTimer.Stop(); + aWTimer.SetTimeout(nInterval); + aWTimer.Start(); + } + else + aWTimer.SetTimeout(nInterval); + + nUpdateInterval = nInterval; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |