diff options
Diffstat (limited to 'extensions/nsplugin/examples/grapher/grapher.cpp')
-rw-r--r-- | extensions/nsplugin/examples/grapher/grapher.cpp | 619 |
1 files changed, 0 insertions, 619 deletions
diff --git a/extensions/nsplugin/examples/grapher/grapher.cpp b/extensions/nsplugin/examples/grapher/grapher.cpp deleted file mode 100644 index 22f7d09d6..000000000 --- a/extensions/nsplugin/examples/grapher/grapher.cpp +++ /dev/null @@ -1,619 +0,0 @@ -// Include TQt Netscape Plugin classes. -#include "tqnp.h" - -// Include other TQt classes. -#include <tqpainter.h> -#include <tqtextstream.h> -#include <tqbuffer.h> -#include <tqpixmap.h> -#include <tqmenubar.h> -#include <tqpushbutton.h> -#include <tqptrlist.h> -#include <tqmessagebox.h> - -// Include some C library functions. -#include <math.h> -#include <stdlib.h> - -#ifndef M_PI // Some math.h don't include this. -#define M_PI 3.14159265358979323846264338327950288 -#endif - - - -// -// GraphModel is a simple abstract class that describes -// a table of numeric and text data. -// - -class GraphModel { -public: - enum ColType { Numeric, Label }; - - union Datum { - double dbl; - TQString* str; - }; - - virtual TQPtrList<Datum>& graphData()=0; - virtual ColType colType(int col) const=0; - virtual int nCols() const=0; -}; - - -// -// Graph is a widget subclass that displays a GraphModel. -// Since the widget is a TQNPWidget, it can be used as a plugin window, -// returned by Grapher::newWindow() below. -// - -class Graph : public TQNPWidget { - TQ_OBJECT -public: - // Constructs a Graph to display a GraphModel - // - Graph(GraphModel&); - ~Graph(); - - // Two styles are available - Pie and Bar graph - // - enum Style { Pie, Bar }; - static const char* styleName[]; - void setStyle(Style); - void setStyle(const char*); - - // Timer event processing rotates the pie graph - // - void timerEvent(TQTimerEvent*); - - // These functions are provided by TQNPWidget - we override - // them to hide and show the plugin menubar. - // - void enterInstance(); - void leaveInstance(); - - // Paint the graph... - // - void paintEvent(TQPaintEvent*); - // - // ... as either a "Loading" message, a Bar graph, a Pie graph, - // or an error message. - // - void paintWait(TQPaintEvent*); - void paintBar(TQPaintEvent*); - void paintPie(TQPaintEvent*); - void paintError(const char*); - -signals: - // Signals emitted when the Help menus are selected. - void aboutPlugin(); - void aboutData(); - -private: - GraphModel& model; - TQMenuBar *menubar; - Style style; - TQPopupMenu* stylemenu; - int pieRotationTimer; - int pieRotation; - TQPixmap pm; - -private slots: - void setStyleFromMenu(int id); -}; - - -Graph::Graph( GraphModel& mdl ) : - model(mdl), - style(Bar), - pieRotationTimer(0), - pieRotation(0) -{ - // Create a menubar for the widget - // - menubar = new TQMenuBar( this ); - stylemenu = new TQPopupMenu; - stylemenu->setCheckable(TRUE); - for ( Style s = Pie; styleName[s]; s = Style(s+1)) { - stylemenu->insertItem(styleName[s], s+100); - } - connect(stylemenu, TQ_SIGNAL(activated(int)), - this, TQ_SLOT(setStyleFromMenu(int))); - setStyle(Pie); - - menubar->insertItem("Style", stylemenu); - menubar->insertSeparator(); - - TQPopupMenu* help = new TQPopupMenu; - help->insertItem( "About plugin...", this, TQ_SIGNAL(aboutPlugin()) ); - help->insertItem( "About data...", this, TQ_SIGNAL(aboutData()) ); - menubar->insertItem("Help", help); - menubar->hide(); -} - -Graph::~Graph() -{ -} - -void Graph::setStyle(Style s) -{ - if (style != s) { - if (pieRotationTimer) - killTimer(pieRotationTimer); - stylemenu->setItemChecked(100+style, FALSE); - style = s; - if ( style == Pie ) - pieRotationTimer = startTimer( 80 ); - else - pieRotationTimer = 0; - stylemenu->setItemChecked(100+style, TRUE); - update(); - } -} - -void Graph::timerEvent(TQTimerEvent*) -{ - pieRotation = ( pieRotation + 6 ) % 360; repaint(FALSE); -} - -void Graph::setStyle(const char* stext) -{ - for ( Style s = Pie; styleName[s]; s = Style(s+1) ) { - if ( tqstricmp(stext,styleName[s])==0 ) { - setStyle(s); - return; - } - } -} - -void Graph::enterInstance() -{ - menubar->show(); -} - -void Graph::leaveInstance() -{ - menubar->hide(); -} - -void Graph::paintError(const char* e) -{ - TQPainter p(this); - int w = width(); - p.drawText(w/8, 0, w-w/4, height(), AlignCenter|WordBreak, e); -} - -void Graph::paintBar(TQPaintEvent* event) -{ - if ( model.colType(0) != GraphModel::Numeric ) { - paintError("First column not numeric, cannot draw bar graph\n"); - return; - } - - TQPtrList<GraphModel::Datum>& data = model.graphData(); - - double max = 0.0; - - for (GraphModel::Datum* rowdata = data.first(); - rowdata; rowdata = data.next()) - { - if (rowdata[0].dbl > max) max = rowdata[0].dbl; - } - - const uint w = width(); - const uint h = height(); - - TQPainter p(this); - - p.setClipRect(event->rect()); - - if ( w > data.count() ) { - // More pixels than data - int x = 0; - int i = 0; - TQFontMetrics fm=fontMetrics(); - int fh = fm.height(); - - for (GraphModel::Datum* rowdata = data.first(); - rowdata; rowdata = data.next()) - { - TQColor c; - c.setHsv( (i * 255)/data.count(), 255, 255 );// rainbow effect - p.setBrush(c); - int bw = (w-w/4-x)/(data.count()-i); - int bh = int((h-h/4-1)*rowdata[0].dbl/max); - p.drawRect( w/8+x, h-h/8-1-bh, bw, bh ); - - i++; - x+=bw; - } - } else { - // More data than pixels - int x = 0; - int i = 0; - double av = 0.0; - int n = 0; - for (GraphModel::Datum* rowdata = data.first(); rowdata; - rowdata = data.next()) - { - int bx = i*w/data.count(); - - if (bx > x) { - TQColor c; - c.setHsv( (x * 255)/w, 255, 255 );// rainbow effect - p.setPen(c); - int bh = int(h*av/n/max); - - p.drawLine(x,h-1,x,h-bh); - - av = 0.0; - n = 0; - x = bx; - } - - av += rowdata[0].dbl; - n++; - - i++; - } - } -} - -void Graph::paintPie(TQPaintEvent* event) -{ - if ( model.colType(0) != GraphModel::Numeric ) { - paintError("First column not numeric, cannot draw pie graph\n"); - return; - } - - TQPtrList<GraphModel::Datum>& data = model.graphData(); - - double total = 0.0; - - GraphModel::Datum* rowdata; - - for (rowdata = data.first(); - rowdata; rowdata = data.next()) - { - total += rowdata[0].dbl; - } - - // Only use first column for pie chart - if ( !total ) return; - - int apos = (pieRotation-90)*16; - - const int w = width(); - const int h = height(); - - const int xd = w - w/5; - const int yd = h - h/5; - - pm.resize(width(),height()); - pm.fill(backgroundColor()); - TQPainter p(&pm); - p.setFont(font()); - - p.setClipRect(event->rect()); - - int i = 0; - - for (rowdata = data.first(); - rowdata; rowdata = data.next()) - { - TQColor c; - - c.setHsv( ( i * 255)/data.count(), 255, 255 );// rainbow effect - p.setBrush( c ); // solid fill with color c - - int a = int(( rowdata[0].dbl * 360.0 ) / total * 16.0 + 0.5); - p.drawPie( w/10, h/10, xd, yd, -apos, -a ); - apos += a; - i++; - } - - if (model.colType(1) == GraphModel::Label) { - double apos = (pieRotation-90)*M_PI/180; - - for (rowdata = data.first(); - rowdata; rowdata = data.next()) - { - double a = rowdata[0].dbl * 360 / total * M_PI / 180; - int x = int(cos(apos+a/2)*w*5/16 + w/2 + 0.5); - int y = int(sin(apos+a/2)*h*5/16 + h/2 + 0.5); - - // ### This causes a crash, so comment out for now - /*p.drawText(x-w/8, y-h/8, w/4, h/4, - WordBreak|AlignCenter, - *rowdata[1].str);*/ - apos += a; - } - } - - TQPainter p2(this); - p2.setClipRect(event->rect()); - p2.drawPixmap(0,0,pm); -} - -void Graph::paintWait(TQPaintEvent*) -{ - TQPainter p(this); - p.drawText(rect(), AlignCenter, "Loading..."); -} - -void Graph::paintEvent(TQPaintEvent* event) -{ - if (!model.nCols()) { - paintWait(event); - } else { - switch (style) { - case Pie: - paintPie(event); - break; - case Bar: - paintBar(event); - break; - } - } -} - -void Graph::setStyleFromMenu(int id) -{ - setStyle(Style(id-100)); -} - -const char* Graph::styleName[] = { "Pie", "Bar", 0 }; - - -// -// Grapher is a subclass of TQNPInstance, and so it can be returned -// by GrapherPlugin::newInstance(). A TQNPInstance represents the -// plugin, distinctly from the plugin window. -// -// Grapher is also a GraphModel, because it loads graph data from -// the net. When Grapher creates a window in newWindow(), it creates -// a Graph widget to display the GraphModel that is the Grapher itself. -// - -class Grapher : public TQNPInstance, GraphModel { - TQ_OBJECT -public: - // Create a Grapher - all Grapher plugins are created - // by one GrapherPlugin object. - // - Grapher(); - ~Grapher(); - - // We override this TQNPInstance function to create our - // own subclass of TQNPWidget, a Graph widget. - // - TQNPWidget* newWindow(); - - // We override this TQNPInstance function to process the - // incoming graph data. - // - int write(TQNPStream* /*str*/, int /*offset*/, int len, void* buffer); - -private: - // Grapher is a GraphModel, so it implements the pure virtual - // functions of that class. - // - TQPtrList<Datum>& graphData(); - ColType colType(int col) const; - int nCols() const; - - void consumeLine(); - TQPtrList<Datum> data; - TQBuffer line; - int ncols; - ColType *coltype; - -private slots: - // Slots that are connected to the Graph menu items. - // - void aboutPlugin(); - void aboutData(); -}; - -Grapher::Grapher() -{ - data.setAutoDelete(TRUE); - ncols = 0; - line.open(IO_WriteOnly|IO_Truncate); -} - -Grapher::~Grapher() -{ -} - -TQPtrList<GraphModel::Datum>& Grapher::graphData() -{ - return data; -} - -GraphModel::ColType Grapher::colType(int col) const -{ - return coltype[col]; -} - -int Grapher::nCols() const -{ - return ncols; -} - - -TQNPWidget* Grapher::newWindow() -{ - // Create a Graph - our subclass of TQNPWidget. - Graph *graph = new Graph(*this); - - // Look at the arguments from the EMBED tag. - // GRAPHSTYLE chooses pie or bar - // FONTFAMILY and FONTSIZE choose the font - // - const char* style = arg("GRAPHSTYLE"); - if ( style ) graph->setStyle(style); - - const char* fontfamily = arg("FONTFAMILY"); - const char* fontsize = arg("FONTSIZE"); - int ptsize = fontsize ? atoi(fontsize) : graph->font().pointSize(); - if (fontfamily) graph->setFont(TQFont(fontfamily, ptsize)); - - connect(graph, TQ_SIGNAL(aboutPlugin()), this, TQ_SLOT(aboutPlugin())); - connect(graph, TQ_SIGNAL(aboutData()), this, TQ_SLOT(aboutData())); - - return graph; -} - -void Grapher::consumeLine() -{ - line.close(); - line.open(IO_ReadOnly); - - TQTextStream ts( &line ); - - if (ncols == 0 ) { - ncols=0; - TQPtrList<ColType> typelist; - typelist.setAutoDelete(TRUE); - do { - TQString typestr; - ts >> typestr >> ws; - ColType* t = 0; - if ( typestr == "num" ) { - t = new ColType(Numeric); - } else if ( typestr == "label" ) { - t = new ColType(Label); - } - if (t) typelist.append(t); - } while (!ts.atEnd()); - coltype = new ColType[ncols]; - for (ColType* t = typelist.first(); t; t = typelist.next()) { - coltype[ncols++] = *t; - } - } else { - int col=0; - Datum *rowdata = new Datum[ncols]; - while ( col < ncols && !ts.atEnd() ) { - switch (coltype[col]) { - case Numeric: { - double value; - ts >> value >> ws; - rowdata[col].dbl = value; - break; - } - case Label: { - TQString* value = new TQString; - ts >> *value >> ws; - rowdata[col].str = value; - break; - } - } - col++; - } - - data.append(rowdata); - } - - line.close(); - line.open(IO_WriteOnly|IO_Truncate); -} - -int Grapher::write(TQNPStream* /*str*/, int /*offset*/, int len, void* buffer) -{ - // The browser calls this function when data is available on one - // of the streams the plugin has requested. Since we are only - // processing one stream - the URL in the SRC argument of the EMBED - // tag, we assume the TQNPStream is that one. Also, since we do not - // override TQNPInstance::writeReady(), we must accepts ALL the data - // that is sent to this function. - // - char* txt = (char*)buffer; - for (int i=0; i<len; i++) { - char ch = txt[i]; - switch ( ch ) { - case '\n': - consumeLine(); - break; - case '\r': // ignore; - break; - default: - line.putch(ch); - } - } - if ( widget() ) - widget()->update(); - - return len; -} - -void Grapher::aboutPlugin() -{ - getURL( "http://doc.trolltech.com/netscape-plugin.html", "_blank" ); -} - -void Grapher::aboutData() -{ - const char* page = arg("DATAPAGE"); - if (page) - getURL( page, "_blank" ); - else - TQMessageBox::message("Help", "No help for this data"); -} - - -// -// GrapherPlugin is the start of everything. It is a TQNPlugin subclass, -// and it is responsible for describing the plugin to the browser, and -// creating instances of the plugin when it appears in web page. -// - -class GrapherPlugin : public TQNPlugin { -public: - GrapherPlugin() - { - } - - TQNPInstance* newInstance() - { - // Make a new Grapher, our subclass of TQNPInstance. - return new Grapher; - } - - const char* getMIMEDescription() const - { - // Describe the MIME types which this plugin can - // process. Just the concocted "application/x-graphable" - // type, with the "g1n" filename extension. - // - return "application/x-graphable:g1n:Graphable ASCII numeric data"; - } - - const char * getPluginNameString() const - { - // The name of the plugin. This is the title string used in - // the "About Plugins" page of the browser. - // - return "TQt-based Graph Plugin"; - } - - const char * getPluginDescriptionString() const - { - // A longer description of the plugin. - // - return "A TQt-based LiveConnected plug-in that graphs numeric data"; - } - -}; - -// -// Finally, we provide the implementation of TQNPlugin::create(), to -// provide our subclass of TQNPlugin. -// - -TQNPlugin* TQNPlugin::create() -{ - return new GrapherPlugin; -} - -#include "grapher.moc" |