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| -rw-r--r-- | include/sfx2/thumbnailview.hxx | 330 |
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diff --git a/include/sfx2/thumbnailview.hxx b/include/sfx2/thumbnailview.hxx new file mode 100644 index 0000000000..54e8440ad3 --- /dev/null +++ b/include/sfx2/thumbnailview.hxx @@ -0,0 +1,330 @@ +/* -*- 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/. + */ + +#ifndef INCLUDED_SFX2_THUMBNAILVIEW_HXX +#define INCLUDED_SFX2_THUMBNAILVIEW_HXX + +#include <sfx2/dllapi.h> + +#include <functional> +#include <memory> +#include <vector> + +#include <vcl/customweld.hxx> + +class BitmapEx; +class MouseEvent; +class KeyEvent; +class DataChangedEvent; +class ScrollBar; +class ThumbnailViewItem; +typedef ::std::vector< ThumbnailViewItem* > ThumbnailValueItemList; +class ThumbnailViewAcc; +struct ThumbnailItemAttributes; + +/************************************************************************* + + Description + ============ + + class ThumbnailView + + This class allows the selection of an item. In the process items are + drawn side by side. The selection of items can be more clear than in a + ListBox shape for example in case of colors or samples. + The amount of columns drawn by the control and whether the items + should be encircled can be specified. Optional a NoSelection or name + field could be shown. By default image and color items are supported. + Items could be drawn by oneself if InsertItem() is only called with + an ID. To achieve this the UserDraw handler needs to be overridden. The + description text could be specified afterwards in case of UserDraw + and any other items. + + Cross references + + class ListBox + + -------------------------------------------------------------------------- + + WinBits + + WB_VSCROLL A scrollbar will be always shown. The visible number of + lines have to be specified with SetLineCount() if this + flag is set. + WB_TABSTOP It is possible to jump into the ValueSet with the tab key. + WB_NOTABSTOP It is not possible to jump into the ValueSet with the + tab key. + -------------------------------------------------------------------------- + + The number of columns must be either set with SetColCount() or + SetItemWidth(). If the number of columns is specified by SetColCount() + the width of the items will be calculated by the visible range. + If the items should have a static width, it has to be specified + with SetItemWidth(). In this case the number of columns will be calculated + by the visible range. + + The number of rows is given by the number of items / number of columns. The + number of visible rows must either specified by SetLineCount() or + SetItemWidth(). If the number of visible rows is specified by SetLineCount(), + the height of the items will be calculated from the visible height. If the + items should have a fixed height it has to be specified with SetItemHeight(). + In this case the number of visible rows is then calculated from the visible + height. If the number of visible rows is neither specified by SetLineCount() + nor by SetItemHeight() all rows will be shown. The height of the items will + be calculated by the visible height. If the number of visible rows is + specified by SetLineCount() or SetItemHeight() ValueSet does scroll + automatically when more lines are available, as are visible. If scrolling + should be also possible with a ScrollBar WB_VSCROLL needs to be set. + + The distance between the items can be increased by SetExtraSpacing(). The + distance, which will be shown between two items (both in x and in y), is + measured in pixels. + + The exact window size for a specific item size can be calculated by + CalcWindowSizePixel(). To do this all relevant data (number of columns/...) + have to be specified and if no number of rows was set, all items need to + be inserted. If the window was created with WB_BORDER/Border=sal_True the + size has to be specified with SetOutputSizePixel(). In other cases different + size-methods can be used. With CalcItemSize() the inner and outer size of + an item could be calculated (for this the free space defined by + SetExtraSpacing() will not be included). + + The background color could be specified by SetColor(), with which the image + or UserDraw items will be underlaid. If no color is specified the color + of other windows (WindowColor) will be used for the background. + + -------------------------------------------------------------------------- + + At first all items should be inserted and only then Show() should be called + since the output area will be precomputed. If this is not done the first + Paint will appear a little bit slower. Therefore the Control, if it is loaded + from the resource and only supplied with items during runtime, should be + loaded with Hide = sal_True and then displayed with Show(). + + In case of a visible Control the creation of the new output area could be + activated before Paint by calling Format(). + + -------------------------------------------------------------------------- + + If Drag and Drop will be called from the ValueSet the Command-Handler has to + be overridden. From this StartDrag needs to be called. If this method returns + sal_True the drag-process could be initiated by ExecuteDrag(), otherwise no + processing will take place. This method makes sure that ValueSet stops its + processing and as appropriate selects the entry. Therefore the calling of + Select-Handler within this function must be expected. + + For dropping QueryDrop() and Drop() need to be overridden and ShowDropPos() + and HideDropPos() should be called within these methods. + To show the insertion point ShowDropPos() has to be called within the + QueryDrop-Handler. ShowDropPos() also scrolls the ValueSet if the passed + position is located at the window border. Furthermore ShowDropPos() returns + the position, at which the item should be inserted respectively which + insertion point was shown. If no insertion point was determined + VALUESET_ITEM_NOTFOUND will be returned. If the window was left during dragging + or the drag process is terminated HideDropPos() should be called in any case. + + -------------------------------------------------------------------------- + + This class is currently still in the SV-Tools. That's why the ValueSet needs + to be loaded as a Control out of the resource and the desired WinBits have + to be set (before Show) with SetStyle(). + +*************************************************************************/ + +/* ThumbnailView types */ + +#define THUMBNAILVIEW_ITEM_NOTFOUND (sal_uInt16(-1)) + +// Display all the available items in the thumbnail. +class ViewFilterAll +{ +public: + + bool operator () (const ThumbnailViewItem*) const + { + return true; + } +}; + +/** + * + * Class to display thumbnails with their names below their respective icons + * + **/ + +class SFX2_DLLPUBLIC ThumbnailView : public weld::CustomWidgetController +{ + friend class ThumbnailViewAcc; + friend class ThumbnailViewItemAcc; + +public: + ThumbnailView(std::unique_ptr<weld::ScrolledWindow> xWindow, std::unique_ptr<weld::Menu> xMenu); + + virtual ~ThumbnailView() override; + + ThumbnailView& operator=( ThumbnailView const & ) = delete; // MSVC workaround + ThumbnailView( ThumbnailView const & ) = delete; // MSVC workaround + + virtual bool MouseMove(const MouseEvent& rMEvt) override; + + /// Updates information in the view; used only in RecentDocsView ATM. + virtual void Reload() {} + + void AppendItem(std::unique_ptr<ThumbnailViewItem> pItem); + + void RemoveItem(sal_uInt16 nItemId); + + virtual void Clear(); + + // Change current thumbnail item list with new one (invalidates all pointers to a thumbnail item) + void updateItems(std::vector<std::unique_ptr<ThumbnailViewItem>> items); + + size_t GetItemPos( sal_uInt16 nItemId ) const; + + sal_uInt16 GetItemId( size_t nPos ) const; + + sal_uInt16 GetItemId( const Point& rPos ) const; + + virtual bool renameItem(ThumbnailViewItem* pItem, const OUString& sNewTitle); + + bool isDrawMnemonic() const { return mbDrawMnemonics; } + + void setItemMaxTextLength (sal_uInt32 nLength); + + void setItemDimensions (tools::Long ItemWidth, tools::Long ThumbnailHeight, + tools::Long DisplayHeight, int itemPadding); + + void SelectItem( sal_uInt16 nItemId ); + + bool IsItemSelected( sal_uInt16 nItemId ) const; + + /** + * + * @brief deselect all current selected items. + * + **/ + + void deselectItems (); + + void ShowTooltips( bool bShowTooltips ); + + void DrawMnemonics( bool bDrawMnemonics ); + + void filterItems (const std::function<bool (const ThumbnailViewItem*) > &func); + + void setItemStateHdl (const Link<const ThumbnailViewItem*,void> &aLink) { maItemStateHdl = aLink; } + + virtual void Resize() override; + + virtual void Show() override + { + mxScrolledWindow->show(); + CustomWidgetController::Show(); + } + + virtual void Hide() override + { + mxScrolledWindow->hide(); + CustomWidgetController::Hide(); + } + + virtual void SetDrawingArea(weld::DrawingArea* pDrawingArea) override; + + static BitmapEx readThumbnail(const OUString &msURL); + +protected: + + virtual bool KeyInput( const KeyEvent& rKEvt ) override; + + virtual bool MouseButtonDown( const MouseEvent& rMEvt ) override; + + virtual void Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect) override; + + virtual void GetFocus() override; + + virtual void LoseFocus() override; + + virtual OUString RequestHelp(tools::Rectangle& rRect) override; + + virtual css::uno::Reference< css::accessibility::XAccessible > CreateAccessible() override; + + const rtl::Reference<ThumbnailViewAcc> & getAccessible() const; + +protected: + + // Drawing item related functions, override them to make your own custom ones. + + void DrawItem (ThumbnailViewItem const *pItem); + + virtual void OnItemDblClicked (ThumbnailViewItem *pItem); + + // Set Item colors from the ThumbnailView colors + void UpdateColors(); + +protected: + + friend class ThumbnailViewAcc; + friend class ThumbnailViewItemAcc; + + void CalculateItemPositions (bool bScrollBarUsed = false); + void MakeItemVisible( sal_uInt16 nId ); + + void ImplInit(); + + void ImplDeleteItems(); + size_t ImplGetItem( const Point& rPoint ) const; + ThumbnailViewItem* ImplGetItem( size_t nPos ); + sal_uInt16 ImplGetVisibleItemCount() const; + ThumbnailViewItem* ImplGetVisibleItem(sal_uInt16 nVisiblePos); + void ImplFireAccessibleEvent( short nEventId, const css::uno::Any& rOldValue, const css::uno::Any& rNewValue ); + bool ImplHasAccessibleListeners() const; + DECL_DLLPRIVATE_LINK( ImplScrollHdl, weld::ScrolledWindow&, void ); + +protected: + + std::vector< std::unique_ptr<ThumbnailViewItem> > mItemList; + rtl::Reference<ThumbnailViewAcc> mxAccessible; + ThumbnailValueItemList mFilteredItemList; ///< Cache to store the filtered items + ThumbnailValueItemList::iterator mpStartSelRange; + tools::Long mnItemWidth; + tools::Long mnItemHeight; + tools::Long mnItemPadding; + tools::Long mnThumbnailHeight; // Maximum height of the thumbnail + tools::Long mnDisplayHeight; // Height of the data display box (name, etc) + tools::Long mnVItemSpace; // Vertical spacing between rows, -1 to use excess unused height split up between items + tools::Long mnVisLines; + tools::Long mnLines; + + sal_uInt16 mnCols; + sal_uInt16 mnFirstLine; + bool mbScroll : 1; // Whether we need to scroll + bool mbAllowVScrollBar : 1; // Whether to show a visible scrollbar + bool mbHasVisibleItems : 1; + bool mbShowTooltips : 1; + bool mbDrawMnemonics : 1; + bool mbSelectOnFocus : 1; + bool mbAllowMultiSelection : 1; + Color maFillColor; ///< Background color of the thumbnail view widget. + Color maTextColor; ///< Text color. + Color maHighlightColor; ///< Color of the highlight (background) of the hovered item. + Color maHighlightTextColor; ///< Color of the text for the highlighted item. + double mfHighlightTransparence; ///< Transparence of the highlight. + + Link<const ThumbnailViewItem*, void> maItemStateHdl; + std::unique_ptr<ThumbnailItemAttributes> mpItemAttrs; + std::unique_ptr<weld::ScrolledWindow> mxScrolledWindow; + std::unique_ptr<weld::Menu> mxContextMenu; + + std::function<bool (const ThumbnailViewItem*)> maFilterFunc; +}; + + +#endif // INCLUDED_SFX2_THUMBNAILVIEW_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |