void draw_text(const Rect* r, const char* str)
{
Gdiplus::SolidBrush* brush = new Gdiplus::SolidBrush(*color);
if(brush == NULL) return;
st count = cl::StringUtil::char_to_wchar_count(str);
wchar* wstr = cl_alloc_type_with_count(wchar, count);
if(wstr == NULL) { delete brush; return; }
cl::StringUtil::char_to_wchar(wstr, count, str);
Gdiplus::Region old_val;
graphics->GetClip(&old_val);
Gdiplus::Region new_val(TO_RECT(r));
graphics->SetClip(&new_val);
graphics->DrawString(wstr, -1, font, TO_POINTF(((Point*)r)), brush);
graphics->SetClip(&old_val);
cl_free(wstr);
delete brush;
}
void Sprite::OnDraw( Gdiplus::Graphics &g, const Gdiplus::RectF &rcDirty )
{
if (!m_bVisible)
{
return; // 子节点也不会被绘制
}
// 前序遍历 让父节点先绘制
//Gdiplus::RectF rc = GetRect();
//if (10 == rc.Width && 10 == rc.Height)
//{
// LOGW(<<L"Orignal Size 10 10"); // 检查下有没有多余的重绘
//}
if (m_bClipChildren)
{
Gdiplus::RectF rcClip = GetRect();
rcClip.X = 0.0f;
rcClip.Y = 0.0f;
g.SetClip(rcClip);
}
PaintEvent ev;
ev.graphics = &g;
ev.rcDirty = rcDirty;
SendNotify(ePaint, &ev);
//this->ClientDraw(g, rcDirty);
Sprite *sp = m_firstChild;
while(sp)
{
// 如果需要重绘部分矩形和sp相交则重画它 否则不重画
// 这里还有个问题就是 父矩形必须比子矩形要大 否则可能父的相交不到 而子的相交的到
// 可能要强制这一原理 类似于浏览器 会撑大
Gdiplus::RectF rc2 = sp->GetRect();
Gdiplus::RectF rcAbs = sp->GetAbsRect();
rcAbs.X -= 0.5f; // FIXME 有时无法得到重画导致边界1像素消失
rcAbs.Y -= 0.5f;
rcAbs.Width += 1.0f;
rcAbs.Height += 1.0f;
if (rcDirty.IntersectsWith(rcAbs))
{
g.TranslateTransform(rc2.X, rc2.Y);
sp->OnDraw(g, rcDirty);
g.TranslateTransform(-rc2.X, -rc2.Y);
}
sp = sp->m_nextSibling;
}
if (m_bClipChildren)
{
g.ResetClip();
}
}
void GraphicsContext::clipPath(const Path& path, WindRule clipRule)
{
if (paintingDisabled())
return;
// FIXME: Why does this method ignore empty paths?
if (path.isEmpty())
return;
wxGraphicsContext* gc = m_data->context->GetGraphicsContext();
#if wxUSE_CAIRO
cairo_t* cr = (cairo_t*)gc->GetNativeContext();
cairo_path_t* nativePath = (cairo_path_t*)path.platformPath()->GetNativePath();
cairo_new_path(cr);
cairo_append_path(cr, nativePath);
cairo_set_fill_rule(cr, clipRule == RULE_EVENODD ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
cairo_clip(cr);
#elif __WXMAC__
CGContextRef context = (CGContextRef)gc->GetNativeContext();
CGPathRef nativePath = (CGPathRef)path.platformPath()->GetNativePath();
CGContextBeginPath(context);
CGContextAddPath(context, nativePath);
if (clipRule == RULE_EVENODD)
CGContextEOClip(context);
else
CGContextClip(context);
#elif __WXMSW__
Gdiplus::Graphics* g = (Gdiplus::Graphics*)gc->GetNativeContext();
Gdiplus::GraphicsPath* nativePath = (Gdiplus::GraphicsPath*)path.platformPath()->GetNativePath();
if (clipRule == RULE_EVENODD)
nativePath->SetFillMode(Gdiplus::FillModeAlternate);
else
nativePath->SetFillMode(Gdiplus::FillModeWinding);
g->SetClip(nativePath);
#endif
}
bool CanvasGdiplus::ClipRectInt(int x, int y, int w, int h)
{
Gdiplus::Graphics* current = GetCurrentGraphics();
return current->SetClip(Gdiplus::Rect(x, y, w, h),
Gdiplus::CombineModeIntersect) == Gdiplus::Ok;
}
void Graphics::SetClip(const RectF& rc) {
Gdiplus::Graphics* g = reinterpret_cast<Gdiplus::Graphics*>(_private);
g->SetClip(ToGDIRect<RectF, Gdiplus::RectF>(rc));
}