Shamusworld >> Repos - architektonas/blob - src/base/rs_previewactioninterface.cpp

   1 // rs_previewactioninterface.cpp
   2 //
   3 // Part of the Architektonas Project
   4 // Originally part of QCad Community Edition by Andrew Mustun
   5 // Extensively rewritten and refactored by James L. Hammons
   6 // (C) 2010 Underground Software
   7 //
   8 // JLH = James L. Hammons <jlhamm@acm.org>
   9 //
  10 // Who  When        What
  11 // ---  ----------  -----------------------------------------------------------
  12 // JLH  06/02/2010  Added this text. :-)
  13 //
  14
  15 #include "rs_previewactioninterface.h"
  16
  17 #include "rs_debug.h"
  18 #include "graphicview.h"
  19 #include "rs_preview.h"
  20
  21 /**
  22  * Constructor.
  23  *
  24  * Sets the entity container on which the action class inherited
  25  * from this interface operates.
  26  */
  27 RS_PreviewActionInterface::RS_PreviewActionInterface(const char * name,
  28         RS_EntityContainer & container, GraphicView & graphicView):
  29         RS_ActionInterface(name, container, graphicView)
  30 {
  31         RS_DEBUG->print("RS_PreviewActionInterface::RS_PreviewActionInterface: Setting up action with preview: \"%s\"", name);
  32
  33         // preview is linked to the container for getting access to
  34         //   document settings / dictionary variables
  35         preview = new RS_Preview(&container);
  36         visible = false;
  37
  38         RS_DEBUG->print("RS_PreviewActionInterface::RS_PreviewActionInterface: Setting up action with preview: \"%s\": OK", name);
  39 }
  40
  41 /** Destructor */
  42 RS_PreviewActionInterface::~RS_PreviewActionInterface()
  43 {
  44         delete preview;
  45 }
  46
  47 void RS_PreviewActionInterface::init(int status)
  48 {
  49         RS_ActionInterface::init(status);
  50         //deletePreview();
  51         clearPreview();
  52 }
  53
  54 void RS_PreviewActionInterface::finish()
  55 {
  56         RS_ActionInterface::finish();
  57         deletePreview();
  58         clearPreview();
  59 }
  60
  61 void RS_PreviewActionInterface::suspend()
  62 {
  63         RS_ActionInterface::suspend();
  64         deletePreview();
  65         //clearPreview();
  66 }
  67
  68 void RS_PreviewActionInterface::resume()
  69 {
  70         RS_ActionInterface::resume();
  71         drawPreview();
  72 }
  73
  74 void RS_PreviewActionInterface::trigger()
  75 {
  76         RS_ActionInterface::trigger();
  77         deletePreview();
  78         clearPreview();
  79 }
  80
  81 /**
  82  * Clears the preview by removing all entities in it.
  83  */
  84 void RS_PreviewActionInterface::clearPreview()
  85 {
  86         preview->clear();
  87 }
  88
  89 /**
  90  * Draws the preview on the screen.
  91  */
  92 void RS_PreviewActionInterface::drawPreview()
  93 {
  94         if (!visible)
  95                 xorPreview();
  96 }
  97
  98 /**
  99  * Deletes the preview from the screen.
 100  */
 101 void RS_PreviewActionInterface::deletePreview()
 102 {
 103         if (visible)
 104                 xorPreview();
 105 }
 106
 107 /**
 108  * Draws / deletes the current preview.
 109  */
 110 void RS_PreviewActionInterface::xorPreview()
 111 {
 112 //not true anymore..
 113 //#warning "!!! xorPreview() not working AT ALL !!!"
 114 #if 0
 115         if (!preview->isEmpty())
 116         {
 117                 RS_Painter * painter = graphicView->createDirectPainter();
 118                 painter->setPreviewMode();
 119                 painter->setOffset(offset);
 120                 graphicView->drawEntity(preview, false);
 121                 graphicView->destroyPainter();
 122         }
 123
 124         visible = !visible;
 125 #else
 126         // OK, we need a new approach here--direct painting is NOT acceptable anymore!
 127         // So, something like this:
 128         /*
 129         In graphicView->drawEntity(preview, false); we set the pointer to an entity
 130         in the GV. We set a flag telling paintEvent that this is a preview, and then
 131         call update() in the view. *That* should do it...
 132         */
 133 //This doesn't work, causes the thing to crash...
 134 //Now it works, just need to upgrade the rendering paths so that they aren't all
 135 //fucked up like QCad was...
 136         if (!preview->isEmpty())
 137         {
 138                 graphicView->SetPreviewMode();
 139                 graphicView->SetPreviewEntity(preview);
 140                 graphicView->SetPreviewOffset(offset);
 141                 graphicView->redraw();
 142         }
 143
 144         visible = !visible;
 145 #endif
 146 }