void
RadialMap::Widget::paintExplodedLabels(QPainter &paint) const
{
//we are a friend of RadialMap::Map
LabelList list;
list.setAutoDelete(true);
Q3PtrListIterator<Label> it(list);
unsigned int startLevel = 0;
//1. Create list of labels sorted in the order they will be rendered
if (m_focus && m_focus->file() != m_tree) //separate behavior for selected vs unselected segments
{
//don't bother with files
if (m_focus->file() && !m_focus->file()->isDirectory())
return;
//find the range of levels we will be potentially drawing labels for
//startLevel is the level above whatever m_focus is in
for (const Directory *p = (const Directory*)m_focus->file(); p != m_tree; ++startLevel)
p = p->parent();
//range=2 means 2 levels to draw labels for
unsigned int a1, a2, minAngle;
a1 = m_focus->start();
a2 = m_focus->end(); //boundry angles
minAngle = int(m_focus->length() * LABEL_MIN_ANGLE_FACTOR);
#define segment (*it)
#define ring (m_map.m_signature + i)
//**** Levels should be on a scale starting with 0
//**** range is a useless parameter
//**** keep a topblock var which is the lowestLevel OR startLevel for identation purposes
for (unsigned int i = startLevel; i <= m_map.m_visibleDepth; ++i)
for (Iterator<Segment> it = ring->iterator(); it != ring->end(); ++it)
if (segment->start() >= a1 && segment->end() <= a2)
if (segment->length() > minAngle)
list.inSort(new Label(segment, i));
#undef ring
#undef segment
} else {
#define ring m_map.m_signature
for (Iterator<Segment> it = ring->iterator(); it != ring->end(); ++it)
if ((*it)->length() > 288)
list.inSort(new Label((*it), 0));
#undef ring
}
//2. Check to see if any adjacent labels are too close together
// if so, remove the least significant labels
it.toFirst();
Q3PtrListIterator<Label> jt(it);
++jt;
while (jt) //**** no need to check _it_ as jt will be NULL if _it_ was too
{
//this method is fairly efficient
if ((*it)->tooClose((*jt)->a)) {
if ((*it)->lvl > (*jt)->lvl) {
list.remove(*it);
it = jt;
}
else
list.remove(*jt);
}
else
++it;
jt = it;
++jt;
}
//used in next two steps
bool varySizes;
//**** should perhaps use doubles
int *sizes = new int [ m_map.m_visibleDepth + 1 ]; //**** make sizes an array of floats I think instead (or doubles)
do
{
//3. Calculate font sizes
{
//determine current range of levels to draw for
uint range = 0;
for (it.toFirst(); it != 0; ++it)
{
uint lvl = (*it)->lvl;
if (lvl > range)
range = lvl;
//**** better way would just be to assign if nothing is range
}
range -= startLevel; //range 0 means 1 level of labels
varySizes = Config::varyLabelFontSizes && (range != 0);
if (varySizes)
{
//create an array of font sizes for various levels
//will exceed normal font pitch automatically if necessary, but not minPitch
//**** this needs to be checked lots
//**** what if this is negative (min size gtr than default size)
uint step = (paint.font().pointSize() - Config::minFontPitch) / range;
if (step == 0)
step = 1;
for (uint x = range + startLevel, y = Config::minFontPitch; x >= startLevel; y += step, --x)
sizes[x] = y;
}
}
//4. determine label co-ordinates
int x1, y1, x2, y2, x3, tx, ty; //coords
double sinra, cosra, ra; //angles
int cx = m_map.width() / 2 + m_offset.x(); //centre relative to canvas
int cy = m_map.height() / 2 + m_offset.y();
int spacer, preSpacer = int(m_map.m_ringBreadth * 0.5) + m_map.m_innerRadius;
int fullStrutLength = (m_map.width() - m_map.MAP_2MARGIN) / 2 + LABEL_MAP_SPACER; //full length of a strut from map center
int prevLeftY = 0;
int prevRightY = height();
bool rightSide;
QFont font;
for (it.toFirst(); it != 0; ++it)
{
//** bear in mind that text is drawn with QPoint param as BOTTOM left corner of text box
QString qs = (*it)->segment->file()->name();
if (varySizes)
font.setPointSize(sizes[(*it)->lvl]);
QFontMetrics fm(font);
int fmh = fm.height(); //used to ensure label texts don't overlap
int fmhD4 = fmh / 4;
fmh += LABEL_TEXT_VMARGIN;
rightSide = ((*it)->a < 1440 || (*it)->a > 4320);
ra = M_PI/2880 * (*it)->a; //convert to radians
sincos(ra, &sinra, &cosra);
spacer = preSpacer + m_map.m_ringBreadth * (*it)->lvl;
x1 = cx + (int)(cosra * spacer);
y1 = cy - (int)(sinra * spacer);
y2 = y1 - (int)(sinra * (fullStrutLength - spacer));
if (rightSide) { //righthand side, going upwards
if (y2 > prevRightY /*- fmh*/) //then it is too low, needs to be drawn higher
y2 = prevRightY /*- fmh*/;
}
else //lefthand side, going downwards
if (y2 < prevLeftY/* + fmh*/) //then we're too high, need to be drawn lower
y2 = prevLeftY /*+ fmh*/;
x2 = x1 - int(double(y2 - y1) / tan(ra));
ty = y2 + fmhD4;
if (rightSide) {
if (x2 > width() || ty < fmh || x2 < x1) {
//skip this strut
//**** don't duplicate this code
list.remove(*it); //will delete the label and set it to list.current() which _should_ be the next ptr
break;
}
prevRightY = ty - fmh - fmhD4; //must be after above's "continue"
qs = fm.elidedText(qs, Qt::ElideMiddle, width() - x2);
x3 = width() - fm.width(qs)
- LABEL_HMARGIN //outer margin
- LABEL_TEXT_HMARGIN //margin between strut and text
//- ((*it)->lvl - startLevel) * LABEL_HMARGIN; //indentation
;
if (x3 < x2) x3 = x2;
tx = x3 + LABEL_TEXT_HMARGIN;
} else {
if (x2 < 0 || ty > height() || x2 > x1)
{
//skip this strut
list.remove(*it); //will delete the label and set it to list.current() which _should_ be the next ptr
break;
}
prevLeftY = ty + fmh - fmhD4;
qs = fm.elidedText(qs, Qt::ElideMiddle, x2);
//**** needs a little tweaking:
tx = fm.width(qs) + LABEL_HMARGIN/* + ((*it)->lvl - startLevel) * LABEL_HMARGIN*/;
if (tx > x2) { //text is too long
tx = LABEL_HMARGIN + x2 - tx; //some text will be lost from sight
x3 = x2; //no text margin (right side of text here)
} else {
x3 = tx + LABEL_TEXT_HMARGIN;
tx = LABEL_HMARGIN /*+ ((*it)->lvl - startLevel) * LABEL_HMARGIN*/;
}
}
(*it)->x1 = x1;
(*it)->y1 = y1;
(*it)->x2 = x2;
(*it)->y2 = y2;
(*it)->x3 = x3;
(*it)->tx = tx;
(*it)->ty = ty;
(*it)->qs = qs;
}
//if an element is deleted at this stage, we need to do this whole
//iteration again, thus the following loop
//**** in rare case that deleted label was last label in top level
// and last in labelList too, this will not work as expected (not critical)
} while (it != 0);
//5. Render labels
paint.setPen(QPen(Qt::black, 1));
for (it.toFirst(); it != 0; ++it)
{
if (varySizes) {
//**** how much overhead in making new QFont each time?
// (implicate sharing remember)
QFont font = paint.font();
font.setPointSize(sizes[(*it)->lvl]);
paint.setFont(font);
}
paint.drawEllipse((*it)->x1 - 3, (*it)->y1 - 3, 7, 7); //**** CPU intensive! better to use a pixmap
paint.drawLine((*it)->x1, (*it)->y1, (*it)->x2, (*it)->y2);
paint.drawLine((*it)->x2, (*it)->y2, (*it)->x3, (*it)->y2);
paint.drawText((*it)->tx, (*it)->ty, (*it)->qs);
}
delete [] sizes;
}
LRESULT WINAPI MessageHandlerProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case LM_GETREVID:
{
UINT uLength;
StringCchPrintf((char*)lParam, 64, "%s %s", V_NAME, V_VERSION);
if (SUCCEEDED(StringCchLength((char*)lParam, 64, &uLength)))
return uLength;
lParam = NULL;
return 0;
}
case LM_REFRESH:
{
StringList labelNames = GetRCNameList("Labels");
// refresh the "AllLabels" configuration
delete defaultSettings;
defaultSettings = new LabelSettings();
for(LabelListIterator iter = labelList.begin(); iter != labelList.end(); iter++)
{
if(!(*iter)->getBox())
{
// destroy all labels that no longer exist and that are not in a box
for(StringListIterator it = labelNames.begin(); it != labelNames.end(); it++)
{
if(_stricmp((*it).c_str(), (*iter)->getName().c_str()) == 0)
break;
}
if (it == labelNames.end())
{
labelList.remove(*iter);
delete *iter;
continue;
}
}
// we can reconfigure all other labels, even if they are "boxed"
(*iter)->reconfigure();
}
// create the rest
for(StringListIterator it = labelNames.begin(); it != labelNames.end(); it++)
{
Label *label = lookupLabel(*it);
if (!label)
{
label = new Label(*it);
label->load(hInstance);
labelList.insert(labelList.end(), label);
}
}
return 0;
}
case LM_UPDATEBG:
{
PaintDesktopEx(0, 0, 0, 0, 0, 0, 0, TRUE);
for(LabelListIterator i = labelList.begin(); i != labelList.end(); i++)
{
Label *label = *i;
if(label->getBox() == 0)
label->repaint(true);
}
return 0;
}
case WM_DISPLAYCHANGE:
case WM_SETTINGCHANGE:
{
PostMessage(hWnd, LM_UPDATEBG, 0, 0);
return 0;
}
}
return DefWindowProc(hWnd, message, wParam, lParam);
}
