/usr/include/Wt/WVmlImage is in libwt-dev 3.3.4+dfsg-6ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 | // This may look like C code, but it's really -*- C++ -*-
/*
* Copyright (C) 2008 Emweb bvba, Kessel-Lo, Belgium.
*
* See the LICENSE file for terms of use.
*/
#ifndef WVML_IMAGE_H_
#define WVML_IMAGE_H_
#include <Wt/WBrush>
#include <Wt/WPen>
#include <Wt/WRectF>
#include <Wt/WShadow>
#include <Wt/WTransform>
#include <Wt/WVectorImage>
#include <Wt/WResource>
#include <sstream>
namespace Wt {
class ServerSideFontMetrics;
/*! \class WVmlImage Wt/WVmlImage Wt/WVmlImage
* \brief A paint device for rendering using the VML pseudo-standard.
*
* The %WVmlImage is used by WPaintedWidget to render to the browser
* using the Vector Markup Language (VML) (to support graphics on
* Internet Explorer browsers).
*
* \note The current implementation has only limited support for
* clipping: only rectangular areas aligned with the X/Y axes can be used
* as clipping path.
*
* \ingroup painting
*/
class WT_API WVmlImage : public WVectorImage
{
public:
/*! \brief Create a VML paint device.
*
* If \p paintUpdate is \c true, then only a VML fragment will be
* rendered that can be used to update the DOM of an existing VML
* image, instead of a full VML image.
*/
WVmlImage(const WLength& width, const WLength& height, bool paintUpdate);
virtual ~WVmlImage();
virtual WFlags<FeatureFlag> features() const;
virtual void setChanged(WFlags<ChangeFlag> flags);
virtual void drawArc(const WRectF& rect, double startAngle, double spanAngle);
virtual void drawImage(const WRectF& rect, const std::string& imgUri,
int imgWidth, int imgHeight, const WRectF& sourceRect);
virtual void drawLine(double x1, double y1, double x2, double y2);
virtual void drawPath(const WPainterPath& path);
virtual void drawText(const WRectF& rect,
WFlags<AlignmentFlag> alignmentFlags,
TextFlag textFlag,
const WString& text);
virtual WTextItem measureText(const WString& text, double maxWidth = -1,
bool wordWrap = false);
virtual WFontMetrics fontMetrics();
virtual void init();
virtual void done();
virtual bool paintActive() const { return painter_ != 0; }
virtual std::string rendered();
virtual WLength width() const { return width_; }
virtual WLength height() const { return height_; }
protected:
virtual WPainter *painter() const { return painter_; }
virtual void setPainter(WPainter *painter) { painter_ = painter; }
private:
WLength width_, height_;
WPainter *painter_;
bool paintUpdate_;
bool penBrushShadowChanged_;
bool clippingChanged_;
WBrush currentBrush_;
WPen currentPen_;
WShadow currentShadow_;
ServerSideFontMetrics *fontMetrics_;
struct ActivePath {
std::string path;
WRectF bbox;
ActivePath()
: bbox(0, 0, 0, 0)
{ }
};
std::vector<ActivePath> activePaths_;
std::stringstream rendered_;
void finishPaths();
void processClipping();
std::string fillElement(const WBrush& brush) const;
std::string strokeElement(const WPen& pen) const;
std::string skewElement(const WTransform& transform) const;
std::string shadowElement(const WShadow& shadow) const;
std::string createShadowFilter() const;
static std::string colorAttributes(const WColor& color);
static std::string quote(double s);
static std::string quote(const std::string& s);
void startClip(const WRectF& rect);
void stopClip();
WRectF currentRect_;
};
}
#endif // WVML_IMAGE_H_
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