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537 lines
16 KiB
537 lines
16 KiB
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/*
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Copyright (c) 2003,2004,2005 Clarence Dang <dang@kde.org>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef KP_VIEW_H
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#define KP_VIEW_H
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#include <tqwidget.h>
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#include <kpdefs.h>
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class kpDocument;
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class kpSelection;
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class kpTool;
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class kpToolToolBar;
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class kpViewManager;
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class kpViewScrollableContainer;
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/**
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* @short Abstract base class for all views.
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*
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* This is the abstract base class for all views. A view is a widget that
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* renders a possibly zoomed onscreen representation of a document.
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*
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* 1 view corresponds to 1 document.
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* 1 document corresponds to 0 or more views.
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*
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* @see kpViewManager
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*
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* @author Clarence Dang <dang@kde.org>
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*/
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class kpView : public TQWidget
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{
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Q_OBJECT
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public:
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/**
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* Constructs a view.
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*
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* @param document The document this view is representing.
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* @param toolToolBar The tool tool bar.
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* @param viewManager The view manager.
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* @param buddyView The view this view watches over (e.g. a thumbnail
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* view would watch over the main view). May be 0.
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* See for example, highlightBuddyViewRectangle().
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* @param scrollableContainer This view's scrollable container.
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* May be 0.
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*
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* You must call adjustEnvironment() at the end of your constructor.
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*/
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kpView (kpDocument *document,
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kpToolToolBar *toolToolBar,
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kpViewManager *viewManager,
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kpView *buddyView,
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kpViewScrollableContainer *scrollableContainer,
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TQWidget *parent, const char *name);
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/**
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* Destructs this view. Informs the viewManager() that the mouse
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* cursor is no longer above this view.
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*/
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virtual ~kpView ();
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/**
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* @returns the document.
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*/
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kpDocument *document () const;
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protected:
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/**
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* @returns the document's selection.
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*/
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kpSelection *selection () const;
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public:
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/**
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* @returns the tool tool bar.
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*/
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kpToolToolBar *toolToolBar () const;
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protected:
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/**
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* @returns the currently selected tool.
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*/
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kpTool *tool () const;
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public:
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/**
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* @returns the view manager.
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*/
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kpViewManager *viewManager () const;
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/**
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* @returns the buddy view.
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*/
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kpView *buddyView () const;
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/**
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* @returns the buddyView()'s scrollable container.
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*/
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kpViewScrollableContainer *buddyViewScrollableContainer () const;
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/**
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* @returns this view's scrollable container.
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*/
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kpViewScrollableContainer *scrollableContainer () const;
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/**
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* @returns the horizontal zoom level (100 is unzoomed).
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*/
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int zoomLevelX (void) const;
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/**
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* @returns the vertical zoom level (100 is unzoomed).
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*/
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int zoomLevelY (void) const;
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/**
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* Sets the horizontal and vertical zoom levels.
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*
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* @param hzoom Horizontal zoom level.
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* @param vzoom Vertical zoom level.
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*
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* If reimplementing, you must call this base implementation.
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*/
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virtual void setZoomLevel (int hzoom, int vzoom);
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/**
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* @returns in views coordinates, where the top-left document() pixel
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* will be rendered (default: (0,0)).
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*/
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TQPoint origin () const;
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/**
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* Sets the origin.
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*
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* @param origin New origin.
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*
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* If reimplementing, you must call this base implementation.
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*/
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virtual void setOrigin (const TQPoint &origin);
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/**
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* @returns whether at this zoom level, the grid can be enabled.
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* This is based on whether the grid can be sensibly rendered.
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*/
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bool canShowGrid () const;
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/**
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* @returns whether the grid is currently shown.
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*/
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bool isGridShown () const;
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/**
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* Turns on/off the grid.
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*
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* @param yes Whether to enable the grid.
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*/
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void showGrid (bool yes = true);
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/**
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* @returns whether to draw a rectangle highlighting the area of
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* buddyView() visible through buddyViewScrollableContainer().
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*/
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bool isBuddyViewScrollableContainerRectangleShown () const;
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/**
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* Turns on/off the rectangle highlighting the area of buddyView()
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* visible through buddyViewScrollableContainer() and redraws.
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*
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* @param yes Whether to turn on the rectangle.
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*/
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void showBuddyViewScrollableContainerRectangle (bool yes = true);
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protected:
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/**
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* @returns the current rectangle highlighting the area of buddyView()
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* visible through buddyViewScrollableContainer(), that is being
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* rendered by this view.
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*/
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TQRect buddyViewScrollableContainerRectangle () const;
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protected slots:
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/**
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* Updates the buddyViewScrollableContainerRectangle() and redraws
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* appropriately.
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*
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* This is already connected to zoomLevelChanged() and originChanged();
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* buddyView() and buddyViewScrollableContainer() signals. There is probably no
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* need to call this function directly.
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*/
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void updateBuddyViewScrollableContainerRectangle ();
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public:
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/**
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* @param viewX Horizontal position in view coordinates.
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*
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* @returns viewX transformed to document coordinates, based on the
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* origin() and zoomLevelX().
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*/
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double transformViewToDocX (double viewX) const;
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/**
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* @param viewY Vertical position in view coordinates.
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*
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* @returns viewY transformed to document coordinates, based on the
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* origin() and zoomLevelY().
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*/
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double transformViewToDocY (double viewY) const;
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/**
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* @param viewPoint Position in view coordinates.
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*
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* @returns viewPoint transformed to document coordinates, based on the
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* origin(), zoomLevelX() and zoomLevelY().
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*/
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TQPoint transformViewToDoc (const TQPoint &viewPoint) const;
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/**
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* @param viewRect Rectangle in view coordinates.
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*
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* @returns viewRect transformed to document coordinates based on the
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* origin(), zoomLevelX() and zoomLevelY().
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*
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* For bounding rectangles, you should use this function instead of
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* transformViewToDocX(), transformViewToDocY() or
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* transformViewToDoc(const TQPoint &) which act on coordinates only.
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*/
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TQRect transformViewToDoc (const TQRect &viewRect) const;
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/**
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* @param docX Horizontal position in document coordinates.
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*
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* @returns docX transformed to view coordinates, based on the origin()
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* and zoomLevelX().
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*/
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double transformDocToViewX (double docX) const;
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/**
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* @param docY Vertical position in document coordinates.
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*
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* @returns docY transformed to view coordinates, based on the origin()
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* and zoomLevelY().
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*/
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double transformDocToViewY (double docY) const;
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/**
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* @param docPoint Position in document coordinates.
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*
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* @returns docPoint transformed to view coordinates, based on the
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* origin(), zoomLevelX(), zoomLevelY().
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*/
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TQPoint transformDocToView (const TQPoint &docPoint) const;
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/**
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* @param docRect Rectangle in document coordinates.
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*
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* @return docRect transformed to view coordinates, based on the
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* origin(), zoomLevelX() and zoomLevelY().
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*
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* For bounding rectangles, you should use this function instead of
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* transformDocToViewX(), transformDocToViewY() or
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* transformDocToView(const TQPoint &) which act on coordinates only.
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*/
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TQRect transformDocToView (const TQRect &docRect) const;
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/**
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* @param viewPoint Position in view coordinates.
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* @param otherView View whose coordinate system the return value will
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* be in.
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*
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* @returns viewPoint transformed to the coordinate system of
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* @param otherView based on this and otherView's origin(),
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* zoomLevelX() and zoomLevelY(). This has less rounding
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* error than otherView->transformDocToView (transformViewToDoc (viewPoint)).
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*/
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TQPoint transformViewToOtherView (const TQPoint &viewPoint,
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const kpView *otherView);
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/**
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* @returns the approximate view width required to display the entire
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* document(), based on the zoom level only.
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*/
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int zoomedDocWidth () const;
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/**
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* @returns the approximate view height required to display the entire
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* document(), based on the zoom level only.
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*/
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int zoomedDocHeight () const;
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protected:
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/**
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* Updates the viewManager() on whether or not the mouse is directly
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* above this view. Among other things, this ensures the brush cursor
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* is updated.
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*
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* This should be called in event handlers.
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*
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* @param yes Whether the mouse is directly above this view.
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*/
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void setHasMouse (bool yes = true);
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public:
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/**
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* Adds a region (in view coordinates) to the dirty area that is
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* repainted when the parent @ref kpViewManager is set not to queue
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* updates.
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*
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* @param region Region (in view coordinates) that needs repainting.
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*/
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void addToQueuedArea (const TQRegion ®ion);
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/**
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* Convenience function. Same as above.
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*
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* Adds a rectangle (in view coordinates) to the dirty area that is
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* repainted when the parent @ref kpViewManager is set not to queue
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* updates.
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*
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* @param rect Rectangle (in view coordinates) that needs repainting.
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*/
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void addToQueuedArea (const TQRect &rect);
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/**
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* Removes the dirty region that has been queued for updating.
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* Does not update the view.
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*/
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void invalidateQueuedArea ();
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/**
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* Updates the part of the view described by dirty region and then
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* calls invalidateQueuedArea(). Does nothing if @ref kpViewManager
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* is set to queue updates.
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*/
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void updateQueuedArea ();
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void updateMicroFocusHint (const TQRect µFocusHint);
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public slots:
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/**
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* Call this when the "environment" (e.g. document size) changes. The
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* environment is defined by the caller and should be based on the type
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* of view. For instance, an unzoomed thumbnail view would also
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* include in its environment the contents position of an associated
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* scrollable container.
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*
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* This is never called by the kpView base class.
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*
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* Implementors should change whatever state is neccessary for their
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* type of view. For instance, an unzoomed view would resize itself;
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* a zoomed thumbnail would change the zoom level.
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*/
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virtual void adjustToEnvironment () = 0;
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public:
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TQRect selectionViewRect () const;
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// (if <viewPoint> is KP_INVALID_POINT, it uses TQCursor::pos())
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TQPoint mouseViewPoint (const TQPoint &returnViewPoint = KP_INVALID_POINT) const;
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TQPoint mouseViewPointRelativeToSelection (const TQPoint &viewPoint = KP_INVALID_POINT) const;
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bool mouseOnSelection (const TQPoint &viewPoint = KP_INVALID_POINT) const;
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int textSelectionMoveBorderAtomicSize () const;
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bool mouseOnSelectionToMove (const TQPoint &viewPoint = KP_INVALID_POINT) const;
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protected:
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bool selectionLargeEnoughToHaveResizeHandlesIfAtomicSize (int atomicSize) const;
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public:
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int selectionResizeHandleAtomicSize () const;
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bool selectionLargeEnoughToHaveResizeHandles () const;
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TQRegion selectionResizeHandlesViewRegion (bool forRenderer = false) const;
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enum SelectionResizeType
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{
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None = 0,
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Left = 1,
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Right = 2,
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Top = 4,
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Bottom = 8
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};
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// Returns a bitwise OR of the SelectionResizeType's
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int mouseOnSelectionResizeHandle (const TQPoint &viewPoint = KP_INVALID_POINT) const;
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bool mouseOnSelectionToSelectText (const TQPoint &viewPoint = KP_INVALID_POINT) const;
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signals:
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/**
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* Emitted after all zooming code has been executed.
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*
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* @param zoomLevelX New zoomLevelX()
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* @param zoomLevelY New zoomLevelY()
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*/
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void zoomLevelChanged (int zoomLevelX, int zoomLevelY);
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/**
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* Emitted after all resizing code has been executed.
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*
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* @param size New view size.
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*/
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void sizeChanged (const TQSize &size);
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/**
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* Convenience signal - same as above.
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*
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* Emitted after all resizing code has been executed.
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*
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* @param width New view width.
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* @param height New view height.
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*/
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void sizeChanged (int width, int height);
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/**
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* Emitted after all origin changing code has been executed.
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*
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* @param origin The new origin.
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*/
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void originChanged (const TQPoint &origin);
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protected:
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virtual void mouseMoveEvent (TQMouseEvent *e);
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virtual void mousePressEvent (TQMouseEvent *e);
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virtual void mouseReleaseEvent (TQMouseEvent *e);
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public:
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// (needs to be public as it may also get event from
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// TQScrollView::contentsWheelEvent())
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virtual void wheelEvent (TQWheelEvent *e);
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protected:
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virtual void keyPressEvent (TQKeyEvent *e);
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virtual void keyReleaseEvent (TQKeyEvent *e);
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virtual void focusInEvent (TQFocusEvent *e);
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virtual void focusOutEvent (TQFocusEvent *e);
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virtual void enterEvent (TQEvent *e);
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virtual void leaveEvent (TQEvent *e);
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virtual void dragEnterEvent (TQDragEnterEvent *);
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virtual void dragLeaveEvent (TQDragLeaveEvent *);
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virtual void imStartEvent (TQIMEvent *e);
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virtual void imComposeEvent (TQIMEvent *e);
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virtual void imEndEvent (TQIMEvent *e);
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public:
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virtual void resize (int w, int h);
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protected:
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virtual void resizeEvent (TQResizeEvent *e);
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protected:
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TQRect paintEventGetDocRect (const TQRect &viewRect) const;
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public:
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/**
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* Draws an opaque background representing transparency. Currently,
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* it draws a checkerboard.
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*
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* @param painter Painter.
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* @param viewWidth Total width of the view visible to the user.
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* @param viewHeight Total height of the view visible to the user.
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* @param rect Rectangle to paint in relative to the painter. Note
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* that this function does not clip and may draw slightly
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* more than the requested rectangle. TODO: why not?
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* @param isPreview Whether the view is for a preview as opposed to
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* e.g. editing. If set, this function may render
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* slightly differently.
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*/
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static void drawTransparentBackground (TQPainter *painter,
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int viewWidth, int viewHeight,
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const TQRect &rect,
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bool isPreview = false);
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protected:
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void paintEventDrawCheckerBoard (TQPainter *painter, const TQRect &viewRect);
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void paintEventDrawSelection (TQPixmap *destPixmap, const TQRect &docRect);
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bool selectionResizeHandleAtomicSizeCloseToZoomLevel () const;
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void paintEventDrawSelectionResizeHandles (TQPainter *painter, const TQRect &viewRect);
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void paintEventDrawTempPixmap (TQPixmap *destPixmap, const TQRect &docRect);
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void paintEventDrawGridLines (TQPainter *painter, const TQRect &viewRect);
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void paintEventDrawRect (const TQRect &viewRect);
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virtual void paintEvent (TQPaintEvent *e);
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private:
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struct kpViewPrivate *d;
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};
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#endif // KP_VIEW_H
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