SVGView
Simple SVG viewer (PainterSvg demo)
Description
The example shows how to use SVG files (ang. Scalable Vector Graphics) within U++ framework.
More information about SVG files you can be found on Wikipedia.
Result
main.cpp
#include <CtrlLib/CtrlLib.h>
#include <Painter/Painter.h>
using namespace Upp;
struct SvgView : public TopWindow {
virtual bool Key(dword key, int);
virtual void Paint(Draw& w);
String svg;
FileList files;
SplitterFrame splitter;
String dir;
FrameTop<Button> dirup;
void Load(const char *filename);
void Enter();
void DoDir();
void DirUp();
typedef SvgView CLASSNAME;
void Serialize(Stream& s);
void LoadDir(const char *d);
void LoadDir() { LoadDir(dir); }
SvgView();
};
void SvgView::Paint(Draw& w)
{
Size sz = GetSize();
w.DrawRect(sz, Gray());
Image img = RenderSVGImage(sz, svg);
Point p = Rect(sz).CenterPos(img.GetSize());
w.DrawImage(p.x, p.y, img);
}
void SvgView::Load(const char *filename)
{
svg = LoadFileBOM(filename);
Refresh();
}
void SvgView::LoadDir(const char *d)
{
files.Clear();
dir = d;
Title(dir);
::Load(files, dir, "*.*");
SortByExt(files);
}
void SvgView::DirUp()
{
String n = DirectoryUp(dir);
LoadDir(dir);
files.FindSetCursor(n);
}
void SvgView::Enter()
{
if(!files.IsCursor()) {
Title(dir);
return;
}
const FileList::File& f = files.Get(files.GetCursor());
if(f.name == "..") {
Title(dir);
return;
}
String p = AppendFileName(dir, f.name);
Title(p);
if(!f.isdir)
Load(p);
}
void SvgView::DoDir()
{
if(!files.IsCursor())
return;
const FileList::File& f = files.Get(files.GetCursor());
if(!f.isdir)
return;
LoadDir(AppendFileName(dir, f.name));
}
bool SvgView::Key(dword key, int)
{
if(key == K_ENTER) {
DoDir();
return true;
}
if(key == K_F5) {
dir = GetDataFile("svg");
LoadDir();
return true;
}
return false;
}
void SvgView::Serialize(Stream& s)
{
int version = 0;
s / version;
SerializePlacement(s);
files.SerializeSettings(s);
s % dir;
s % splitter;
}
SvgView::SvgView()
{
files.WhenEnterItem = THISBACK(Enter);
files.WhenLeftDouble = THISBACK(DoDir);
dirup.Height(max(CtrlImg::DirUp().GetSize().cy, Draw::GetStdFontCy() + 6));
dirup.SetImage(CtrlImg::DirUp());
dirup.NormalStyle();
dirup <<= THISBACK(DirUp);
files.AddFrame(dirup);
Sizeable().Zoomable();
AddFrame(splitter.Left(files, 200));
dir = GetDataFile("svg");
}
GUI_APP_MAIN
{
SvgView x;
LoadFromFile(x);
x.LoadDir();
x.Run();
StoreToFile(x);
}
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