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# kled.cpp

    00001 /* This file is part of the KDE libraries
    00002     Copyright (C) 1998 Jörg Habenicht (j.habenicht@europemail.com)
    00003
    00004     This library is free software; you can redistribute it and/or
    00005     modify it under the terms of the GNU Library General Public
    00006     License as published by the Free Software Foundation; either
    00007     version 2 of the License, or (at your option) any later version.
    00008
    00009     This library is distributed in the hope that it will be useful,
    00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
    00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00012     Library General Public License for more details.
    00013
    00014     You should have received a copy of the GNU Library General Public License
    00015     along with this library; see the file COPYING.LIB.  If not, write to
    00016     the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00017     Boston, MA 02111-1307, USA.
    00018 */
    00019
    00020
    00021 #define PAINT_BENCH
    00022 #undef PAINT_BENCH
    00023
    00024 #ifdef PAINT_BENCH
    00025 #include <qdatetime.h>
    00026 #include <stdio.h>
    00027 #endif
    00028
    00029
    00030 #include <qpainter.h>
    00031 #include <qimage.h>
    00032 #include <qcolor.h>
    00033 #include <kapplication.h>
    00034 #include <kpixmapeffect.h>
    00035 #include "kled.h"
    00036
    00037
    00038 class KLed::KLedPrivate
    00039 {
    00040   friend class KLed;
    00041
    00042   int dark_factor;
    00043   QColor offcolor;
    00044   QPixmap *off_map;
    00045   QPixmap *on_map;
    00046 };
    00047
    00048
    00049
    00050 KLed::KLed(QWidget *parent, const char *name)
    00051   : QWidget( parent, name),
    00052     led_state(On),
    00053     led_look(Raised),
    00054     led_shape(Circular)
    00055 {
    00056   QColor col(green);
    00057   d = new KLed::KLedPrivate;
    00058   d->dark_factor = 300;
    00059   d->offcolor = col.dark(300);
    00060   d->off_map = 0;
    00061   d->on_map = 0;
    00062
    00063   setColor(col);
    00064 }
    00065
    00066
    00067 KLed::KLed(const QColor& col, QWidget *parent, const char *name)
    00068   : QWidget( parent, name),
    00069     led_state(On),
    00070     led_look(Raised),
    00071     led_shape(Circular)
    00072 {
    00073   d = new KLed::KLedPrivate;
    00074   d->dark_factor = 300;
    00075   d->offcolor = col.dark(300);
    00076   d->off_map = 0;
    00077   d->on_map = 0;
    00078
    00079   setColor(col);
    00080   //setShape(Circular);
    00081 }
    00082
    00083 KLed::KLed(const QColor& col, KLed::State state,
    00084        KLed::Look look, KLed::Shape shape, QWidget *parent, const char *name )
    00085   : QWidget(parent, name),
    00086     led_state(state),
    00087     led_look(look),
    00088     led_shape(shape)
    00089 {
    00090   d = new KLed::KLedPrivate;
    00091   d->dark_factor = 300;
    00092   d->offcolor = col.dark(300);
    00093   d->off_map = 0;
    00094   d->on_map = 0;
    00095
    00096   //setShape(shape);
    00097   setColor(col);
    00098 }
    00099
    00100
    00101 KLed::~KLed()
    00102 {
    00103   delete d->off_map;
    00104   delete d->on_map;
    00105   delete d;
    00106 }
    00107
    00108 void
    00109 KLed::paintEvent(QPaintEvent *)
    00110 {
    00111 #ifdef PAINT_BENCH
    00112   const int rounds = 1000;
    00113   QTime t;
    00114   t.start();
    00115   for (int i=0; i<rounds; i++) {
    00116 #endif
    00117   switch(led_shape)
    00118     {
    00119     case Rectangular:
    00120       switch (led_look)
    00121     {
    00122     case Sunken :
    00123       paintRectFrame(false);
    00124       break;
    00125     case Raised :
    00126       paintRectFrame(true);
    00127       break;
    00128     case Flat   :
    00129       paintRect();
    00130       break;
    00131     default  :
    00132       qWarning("%s: in class KLed: no KLed::Look set",qApp->argv()[0]);
    00133     }
    00134       break;
    00135     case Circular:
    00136       switch (led_look)
    00137     {
    00138     case Flat   :
    00139       paintFlat();
    00140       break;
    00141     case Raised :
    00142       paintRound();
    00143       break;
    00144     case Sunken :
    00145       paintSunken();
    00146       break;
    00147     default:
    00148       qWarning("%s: in class KLed: no KLed::Look set",qApp->argv()[0]);
    00149     }
    00150       break;
    00151     default:
    00152       qWarning("%s: in class KLed: no KLed::Shape set",qApp->argv()[0]);
    00153       break;
    00154     }
    00155 #ifdef PAINT_BENCH
    00156   }
    00157   int ready = t.elapsed();
    00158   qWarning("elapsed: %d msec. for %d rounds", ready, rounds);
    00159 #endif
    00160 }
    00161
    00162 int
    00163 KLed::ensureRoundLed()
    00164 {
    00165     // Initialize coordinates, width, and height of the LED
    00166     //
    00167     int width = this->width();
    00168     // Make sure the LED is round!
    00169     if (width > this->height())
    00170         width = this->height();
    00171     width -= 2; // leave one pixel border
    00172     if (width < 0)
    00173         width = 0;
    00174
    00175     return width;
    00176 }
    00177
    00178 bool
    00179 KLed::paintCachedPixmap()
    00180 {
    00181     if (led_state) {
    00182         if (d->on_map) {
    00183             QPainter paint(this);
    00184             paint.drawPixmap(0, 0, *d->on_map);
    00185             return true;
    00186         }
    00187     } else {
    00188         if (d->off_map) {
    00189             QPainter paint(this);
    00190             paint.drawPixmap(0, 0, *d->off_map);
    00191             return true;
    00192         }
    00193     }
    00194
    00195     return false;
    00196 }
    00197
    00198 void
    00199 KLed::paintFlat() // paint a ROUND FLAT led lamp
    00200 {
    00201     if (paintCachedPixmap()) return;
    00202
    00203     QPainter paint;
    00204     QColor color;
    00205     QBrush brush;
    00206     QPen pen;
    00207
    00208     int width = ensureRoundLed();
    00209
    00210
    00211     int scale = 3;
    00212     QPixmap *tmpMap = 0;
    00213
    00214     width *= scale;
    00215
    00216     tmpMap = new QPixmap(width + 6, width + 6);
    00217     tmpMap->fill(paletteBackgroundColor());
    00218
    00219     // start painting widget
    00220     //
    00221     paint.begin(tmpMap);
    00222
    00223     // Set the color of the LED according to given parameters
    00224     color = ( led_state ) ? led_color : d->offcolor;
    00225
    00226     // Set the brush to SolidPattern, this fills the entire area
    00227     // of the ellipse which is drawn with a thin gray "border" (pen)
    00228     brush.setStyle( QBrush::SolidPattern );
    00229     brush.setColor( color );
    00230
    00231     pen.setWidth( scale );
    00232     color = colorGroup().dark();
    00233     pen.setColor( color );          // Set the pen accordingly
    00234
    00235     paint.setPen( pen );            // Select pen for drawing
    00236     paint.setBrush( brush );        // Assign the brush to the painter
    00237
    00238     // Draws a "flat" LED with the given color:
    00239     paint.drawEllipse( scale, scale, width - scale * 2, width - scale * 2 );
    00240
    00241     paint.end();
    00242     //
    00243     // painting done
    00244     QPixmap *&dest = led_state ? d->on_map : d->off_map;
    00245     QImage i = tmpMap->convertToImage();
    00246     width /= 3;
    00247     i = i.smoothScale(width, width);
    00248     delete tmpMap;
    00249     dest = new QPixmap(i);
    00250     paint.begin(this);
    00251     paint.drawPixmap(0, 0, *dest);
    00252     paint.end();
    00253
    00254 }
    00255
    00256 void
    00257 KLed::paintRound() // paint a ROUND RAISED led lamp
    00258 {
    00259     if (paintCachedPixmap()) return;
    00260
    00261     QPainter paint;
    00262     QColor color;
    00263     QBrush brush;
    00264     QPen pen;
    00265
    00266     // Initialize coordinates, width, and height of the LED
    00267     int width = ensureRoundLed();
    00268
    00269     int scale = 3;
    00270     QPixmap *tmpMap = 0;
    00271
    00272     width *= scale;
    00273
    00274     tmpMap = new QPixmap(width + 6, width + 6);
    00275     tmpMap->fill(paletteBackgroundColor());
    00276     paint.begin(tmpMap);
    00277
    00278     // Set the color of the LED according to given parameters
    00279     color = ( led_state ) ? led_color : d->offcolor;
    00280
    00281     // Set the brush to SolidPattern, this fills the entire area
    00282     // of the ellipse which is drawn first
    00283     brush.setStyle( QBrush::SolidPattern );
    00284     brush.setColor( color );
    00285     paint.setBrush( brush );        // Assign the brush to the painter
    00286
    00287     // Draws a "flat" LED with the given color:
    00288     paint.drawEllipse( scale, scale, width - scale*2, width - scale*2 );
    00289
    00290     // Draw the bright light spot of the LED now, using modified "old"
    00291     // painter routine taken from KDEUI´s KLed widget:
    00292
    00293     // Setting the new width of the pen is essential to avoid "pixelized"
    00294     // shadow like it can be observed with the old LED code
    00295     pen.setWidth( 2 * scale );
    00296
    00297     // shrink the light on the LED to a size about 2/3 of the complete LED
    00298     int pos = width/5 + 1;
    00299     int light_width = width;
    00300     light_width *= 2;
    00301     light_width /= 3;
    00302
    00303     // Calculate the LED´s "light factor":
    00304     int light_quote = (130*2/(light_width?light_width:1))+100;
    00305
    00306     // Now draw the bright spot on the LED:
    00307     while (light_width) {
    00308         color = color.light( light_quote );         // make color lighter
    00309     pen.setColor( color );              // set color as pen color
    00310     paint.setPen( pen );                // select the pen for drawing
    00311     paint.drawEllipse( pos, pos, light_width, light_width );    // draw the ellipse (circle)
    00312     light_width--;
    00313     if (!light_width)
    00314              break;
    00315     paint.drawEllipse( pos, pos, light_width, light_width );
    00316     light_width--;
    00317     if (!light_width)
    00318         break;
    00319     paint.drawEllipse( pos, pos, light_width, light_width );
    00320     pos++; light_width--;
    00321     }
    00322
    00323     // Drawing of bright spot finished, now draw a thin gray border
    00324     // around the LED; it looks nicer that way. We do this here to
    00325     // avoid that the border can be erased by the bright spot of the LED
    00326
    00327     pen.setWidth( 2 * scale + 1 );
    00328     color = colorGroup().dark();
    00329     pen.setColor( color );          // Set the pen accordingly
    00330     paint.setPen( pen );            // Select pen for drawing
    00331     brush.setStyle( QBrush::NoBrush );      // Switch off the brush
    00332     paint.setBrush( brush );            // This avoids filling of the ellipse
    00333
    00334     paint.drawEllipse( 2, 2, width, width );
    00335
    00336     paint.end();
    00337     //
    00338     // painting done
    00339     QPixmap *&dest = led_state ? d->on_map : d->off_map;
    00340     QImage i = tmpMap->convertToImage();
    00341     width /= 3;
    00342     i = i.smoothScale(width, width);
    00343     delete tmpMap;
    00344     dest = new QPixmap(i);
    00345     paint.begin(this);
    00346     paint.drawPixmap(0, 0, *dest);
    00347     paint.end();
    00348
    00349 }
    00350
    00351 void
    00352 KLed::paintSunken() // paint a ROUND SUNKEN led lamp
    00353 {
    00354     if (paintCachedPixmap()) return;
    00355
    00356     QPainter paint;
    00357     QColor color;
    00358     QBrush brush;
    00359     QPen pen;
    00360
    00361     // First of all we want to know what area should be updated
    00362     // Initialize coordinates, width, and height of the LED
    00363     int width = ensureRoundLed();
    00364
    00365     int scale = 3;
    00366     QPixmap *tmpMap = 0;
    00367
    00368     width *= scale;
    00369
    00370     tmpMap = new QPixmap(width, width);
    00371     tmpMap->fill(paletteBackgroundColor());
    00372     paint.begin(tmpMap);
    00373
    00374     // Set the color of the LED according to given parameters
    00375     color = ( led_state ) ? led_color : d->offcolor;
    00376
    00377     // Set the brush to SolidPattern, this fills the entire area
    00378     // of the ellipse which is drawn first
    00379     brush.setStyle( QBrush::SolidPattern );
    00380     brush.setColor( color );
    00381     paint.setBrush( brush );                // Assign the brush to the painter
    00382
    00383     // Draws a "flat" LED with the given color:
    00384     paint.drawEllipse( scale, scale, width - scale*2, width - scale*2 );
    00385
    00386     // Draw the bright light spot of the LED now, using modified "old"
    00387     // painter routine taken from KDEUI´s KLed widget:
    00388
    00389     // Setting the new width of the pen is essential to avoid "pixelized"
    00390     // shadow like it can be observed with the old LED code
    00391     pen.setWidth( 2 * scale );
    00392
    00393     // shrink the light on the LED to a size about 2/3 of the complete LED
    00394     int pos = width/5 + 1;
    00395     int light_width = width;
    00396     light_width *= 2;
    00397     light_width /= 3;
    00398
    00399     // Calculate the LED´s "light factor":
    00400     int light_quote = (130*2/(light_width?light_width:1))+100;
    00401
    00402     // Now draw the bright spot on the LED:
    00403     while (light_width) {
    00404     color = color.light( light_quote );                      // make color lighter
    00405     pen.setColor( color );                                   // set color as pen color
    00406     paint.setPen( pen );                                     // select the pen for drawing
    00407     paint.drawEllipse( pos, pos, light_width, light_width ); // draw the ellipse (circle)
    00408     light_width--;
    00409     if (!light_width)
    00410         break;
    00411     paint.drawEllipse( pos, pos, light_width, light_width );
    00412     light_width--;
    00413     if (!light_width)
    00414         break;
    00415     paint.drawEllipse( pos, pos, light_width, light_width );
    00416     pos++; light_width--;
    00417     }
    00418
    00419     // Drawing of bright spot finished, now draw a thin border
    00420     // around the LED which resembles a shadow with light coming
    00421     // from the upper left.
    00422
    00423     pen.setWidth( 2 * scale + 1 ); // ### shouldn't this value be smaller for smaller LEDs?
    00424     brush.setStyle( QBrush::NoBrush );              // Switch off the brush
    00425     paint.setBrush( brush );                        // This avoids filling of the ellipse
    00426
    00427     // Set the initial color value to colorGroup().light() (bright) and start
    00428     // drawing the shadow border at 45° (45*16 = 720).
    00429
    00430     int angle = -720;
    00431     color = colorGroup().light();
    00432
    00433     for ( int arc = 120; arc < 2880; arc += 240 ) {
    00434       pen.setColor( color );
    00435       paint.setPen( pen );
    00436       int w = width - pen.width()/2 - scale + 1;
    00437       paint.drawArc( pen.width()/2, pen.width()/2, w, w, angle + arc, 240 );
    00438       paint.drawArc( pen.width()/2, pen.width()/2, w, w, angle - arc, 240 );
    00439       color = color.dark( 110 ); //FIXME: this should somehow use the contrast value
    00440     }   // end for ( angle = 720; angle < 6480; angle += 160 )
    00441
    00442     paint.end();
    00443     //
    00444     // painting done
    00445
    00446     QPixmap *&dest = led_state ? d->on_map : d->off_map;
    00447     QImage i = tmpMap->convertToImage();
    00448     width /= 3;
    00449     i = i.smoothScale(width, width);
    00450     delete tmpMap;
    00451     dest = new QPixmap(i);
    00452     paint.begin(this);
    00453     paint.drawPixmap(0, 0, *dest);
    00454     paint.end();
    00455
    00456 }
    00457
    00458 void
    00459 KLed::paintRect()
    00460 {
    00461   QPainter painter(this);
    00462   QBrush lightBrush(led_color);
    00463   QBrush darkBrush(d->offcolor);
    00464   QPen pen(led_color.dark(300));
    00465   int w=width();
    00466   int h=height();
    00467   // -----
    00468   switch(led_state)
    00469   {
    00470   case On:
    00471     painter.setBrush(lightBrush);
    00472     painter.drawRect(0, 0, w, h);
    00473     break;
    00474   case Off:
    00475     painter.setBrush(darkBrush);
    00476     painter.drawRect(0, 0, w, h);
    00477     painter.setPen(pen);
    00478     painter.drawLine(0, 0, w, 0);
    00479     painter.drawLine(0, h-1, w, h-1);
    00480     // Draw verticals
    00481     int i;
    00482     for(i=0; i < w; i+= 4 /* dx */)
    00483       painter.drawLine(i, 1, i, h-1);
    00484     break;
    00485   default: break;
    00486   }
    00487 }
    00488
    00489 void
    00490 KLed::paintRectFrame(bool raised)
    00491 {
    00492   QPainter painter(this);
    00493   QBrush lightBrush(led_color);
    00494   QBrush darkBrush(d->offcolor);
    00495   int w=width();
    00496   int h=height();
    00497   QColor black=Qt::black;
    00498   QColor white=Qt::white;
    00499   // -----
    00500   if(raised)
    00501     {
    00502       painter.setPen(white);
    00503       painter.drawLine(0, 0, 0, h-1);
    00504       painter.drawLine(1, 0, w-1, 0);
    00505       painter.setPen(black);
    00506       painter.drawLine(1, h-1, w-1, h-1);
    00507       painter.drawLine(w-1, 1, w-1, h-1);
    00508       painter.fillRect(1, 1, w-2, h-2,
    00509                    (led_state==On)? lightBrush : darkBrush);
    00510     } else {
    00511       painter.setPen(black);
    00512       painter.drawRect(0,0,w,h);
    00513       painter.drawRect(0,0,w-1,h-1);
    00514       painter.setPen(white);
    00515       painter.drawRect(1,1,w-1,h-1);
    00516       painter.fillRect(2, 2, w-4, h-4,
    00517                (led_state==On)? lightBrush : darkBrush);
    00518     }
    00519 }
    00520
    00521 KLed::State
    00522 KLed::state() const
    00523 {
    00524   return led_state;
    00525 }
    00526
    00527 KLed::Shape
    00528 KLed::shape() const
    00529 {
    00530   return led_shape;
    00531 }
    00532
    00533 QColor
    00534 KLed::color() const
    00535 {
    00536   return led_color;
    00537 }
    00538
    00539 KLed::Look
    00540 KLed::look() const
    00541 {
    00542   return led_look;
    00543 }
    00544
    00545 void
    00546 KLed::setState( State state )
    00547 {
    00548   if (led_state != state)
    00549     {
    00550       led_state = state;
    00551       update();
    00552     }
    00553 }
    00554
    00555 void
    00556 KLed::toggleState()
    00557 {
    00558   toggle();
    00559 }
    00560
    00561 void
    00562 KLed::setShape(KLed::Shape s)
    00563 {
    00564   if(led_shape!=s)
    00565     {
    00566       led_shape = s;
    00567       update();
    00568     }
    00569 }
    00570
    00571 void
    00572 KLed::setColor(const QColor& col)
    00573 {
    00574   if(led_color!=col) {
    00575     if(d->on_map)  { delete d->on_map; d->on_map = 0; }
    00576     if(d->off_map) { delete d->off_map; d->off_map = 0; }
    00577     led_color = col;
    00578     d->offcolor = col.dark(d->dark_factor);
    00579     update();
    00580   }
    00581 }
    00582
    00583 void
    00584 KLed::setDarkFactor(int darkfactor)
    00585 {
    00586   if (d->dark_factor != darkfactor) {
    00587     d->dark_factor = darkfactor;
    00588     d->offcolor = led_color.dark(darkfactor);
    00589     update();
    00590   }
    00591 }
    00592
    00593 int
    00594 KLed::darkFactor() const
    00595 {
    00596   return d->dark_factor;
    00597 }
    00598
    00599 void
    00600 KLed::setLook( Look look )
    00601 {
    00602   if(led_look!=look)
    00603     {
    00604       led_look = look;
    00605       update();
    00606     }
    00607 }
    00608
    00609 void
    00610 KLed::toggle()
    00611 {
    00612   led_state = (led_state == On) ? Off : On;
    00613   // setColor(led_color);
    00614   update();
    00615 }
    00616
    00617 void
    00618 KLed::on()
    00619 {
    00620   setState(On);
    00621 }
    00622
    00623 void
    00624 KLed::off()
    00625 {
    00626   setState(Off);
    00627 }
    00628
    00629 QSize
    00630 KLed::sizeHint() const
    00631 {
    00632   return QSize(16, 16);
    00633 }
    00634
    00635 QSize
    00636 KLed::minimumSizeHint() const
    00637 {
    00638   return QSize(16, 16 );
    00639 }
    00640
    00641 void KLed::virtual_hook( int, void* )
    00642 { /*BASE::virtual_hook( id, data );*/ }
    00643
    00644 #include "kled.moc"

This file is part of the documentation for kdeui Library Version 3.4.1.
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