void
ActivityView::_DrawHistory(bool drawBackground)
{
_UpdateOffscreenBitmap();
BView* view = this;
if (fOffscreen != NULL) {
fOffscreen->Lock();
view = _OffscreenView();
}
BRect frame = _HistoryFrame();
BRect outerFrame = frame.InsetByCopy(-2, -2);
// draw the outer frame
uint32 flags = 0;
if (!drawBackground)
flags |= BControlLook::B_BLEND_FRAME;
be_control_look->DrawTextControlBorder(this, outerFrame,
outerFrame, fLegendBackgroundColor, flags);
// convert to offscreen view if necessary
if (view != this)
frame.OffsetTo(B_ORIGIN);
view->SetLowColor(fHistoryBackgroundColor);
view->FillRect(frame, B_SOLID_LOW);
uint32 step = 2;
uint32 resolution = fDrawResolution;
if (fDrawResolution > 1) {
step = 1;
resolution--;
}
// We would get a negative number of steps which isn't a good idea.
if (frame.IntegerWidth() <= 10)
return;
uint32 width = frame.IntegerWidth() - 10;
uint32 steps = width / step;
bigtime_t timeStep = RefreshInterval() * resolution;
bigtime_t now = system_time();
// Draw scale
// TODO: add second markers?
view->SetPenSize(1);
rgb_color scaleColor = view->LowColor();
uint32 average = (scaleColor.red + scaleColor.green + scaleColor.blue) / 3;
if (average < 96)
scaleColor = tint_color(scaleColor, B_LIGHTEN_2_TINT);
else
scaleColor = tint_color(scaleColor, B_DARKEN_2_TINT);
view->SetHighColor(scaleColor);
view->StrokeLine(BPoint(frame.left, frame.top + frame.Height() / 2),
BPoint(frame.right, frame.top + frame.Height() / 2));
// Draw values
view->SetPenSize(1.5);
BAutolock _(fSourcesLock);
for (uint32 i = fSources.CountItems(); i-- > 0;) {
ViewHistory* viewValues = fViewValues.ItemAt(i);
DataSource* source = fSources.ItemAt(i);
DataHistory* values = fValues.ItemAt(i);
viewValues->Update(values, steps, fDrawResolution, now, timeStep,
RefreshInterval());
if (viewValues->Start() >= (int32)steps - 1)
continue;
uint32 x = viewValues->Start() * step;
bool first = true;
view->SetHighColor(source->Color());
view->SetLineMode(B_BUTT_CAP, B_ROUND_JOIN);
view->MovePenTo(B_ORIGIN);
try {
view->BeginLineArray(steps - viewValues->Start() - 1);
BPoint prev;
for (uint32 j = viewValues->Start(); j < steps; x += step, j++) {
float y = _PositionForValue(source, values,
viewValues->ValueAt(j));
if (first) {
first = false;
} else
view->AddLine(prev, BPoint(x, y), source->Color());
prev.Set(x, y);
}
} catch (std::bad_alloc) {
// Not enough memory to allocate the line array.
// TODO we could try to draw using the slower but less memory
// consuming solution using StrokeLine.
}
view->EndLineArray();
}
// TODO: add marks when an app started or quit
view->Sync();
if (fOffscreen != NULL) {
fOffscreen->Unlock();
DrawBitmap(fOffscreen, outerFrame.LeftTop());
}
}
void
ActivityView::FrameResized(float /*width*/, float /*height*/)
{
_UpdateOffscreenBitmap();
}
void
ActivityView::_DrawHistory(bool drawBackground)
{
_UpdateOffscreenBitmap();
BView* view = this;
if (fOffscreen != NULL) {
fOffscreen->Lock();
view = _OffscreenView();
}
BRect frame = _HistoryFrame();
BRect outerFrame = frame.InsetByCopy(-2, -2);
// draw the outer frame
uint32 flags = 0;
if (!drawBackground)
flags |= BControlLook::B_BLEND_FRAME;
be_control_look->DrawTextControlBorder(this, outerFrame,
outerFrame, fLegendBackgroundColor, flags);
// convert to offscreen view if necessary
if (view != this)
frame.OffsetTo(B_ORIGIN);
view->SetLowColor(fHistoryBackgroundColor);
view->FillRect(frame, B_SOLID_LOW);
uint32 step = 2;
uint32 resolution = fDrawResolution;
if (fDrawResolution > 1) {
step = 1;
resolution--;
}
uint32 width = frame.IntegerWidth() - 10;
uint32 steps = width / step;
bigtime_t timeStep = RefreshInterval() * resolution;
bigtime_t now = system_time();
// Draw scale
// TODO: add second markers?
view->SetPenSize(1);
rgb_color scaleColor = view->LowColor();
uint32 average = (scaleColor.red + scaleColor.green + scaleColor.blue) / 3;
if (average < 96)
scaleColor = tint_color(scaleColor, B_LIGHTEN_2_TINT);
else
scaleColor = tint_color(scaleColor, B_DARKEN_2_TINT);
view->SetHighColor(scaleColor);
view->StrokeLine(BPoint(frame.left, frame.top + frame.Height() / 2),
BPoint(frame.right, frame.top + frame.Height() / 2));
// Draw values
view->SetPenSize(1.5);
BAutolock _(fSourcesLock);
for (uint32 i = fSources.CountItems(); i-- > 0;) {
ViewHistory* viewValues = fViewValues.ItemAt(i);
DataSource* source = fSources.ItemAt(i);
DataHistory* values = fValues.ItemAt(i);
viewValues->Update(values, steps, fDrawResolution, now, timeStep,
RefreshInterval());
uint32 x = viewValues->Start() * step;
BShape shape;
bool first = true;
for (uint32 i = viewValues->Start(); i < steps; x += step, i++) {
float y = _PositionForValue(source, values,
viewValues->ValueAt(i));
if (first) {
shape.MoveTo(BPoint(x, y));
first = false;
} else
shape.LineTo(BPoint(x, y));
}
view->SetHighColor(source->Color());
view->SetLineMode(B_BUTT_CAP, B_ROUND_JOIN);
view->MovePenTo(B_ORIGIN);
view->StrokeShape(&shape);
}
// TODO: add marks when an app started or quit
view->Sync();
if (fOffscreen != NULL) {
fOffscreen->Unlock();
DrawBitmap(fOffscreen, outerFrame.LeftTop());
}
}
