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/*
xmunipack - magnifier
Copyright © 2019-21 F.Hroch (hroch@physics.muni.cz)
This file is part of Munipack.
Munipack is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Munipack is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Munipack. If not, see <http://www.gnu.org/licenses/>.
* There're unsolved mystery in sizer, layer algorithm which
prevent setup of an initial size of this window to value
of previously adjusted by user.
*/
#include "dismag.h"
#include "fits.h"
#include <wx/wx.h>
#include <wx/graphics.h>
MuniMagnifier::MuniMagnifier(wxWindow *w, MuniConfig *config):
wxWindow(w,wxID_ANY), scale(config->magnifier_scale), zoom(1.0), inside(false)
{
SetBackgroundStyle(wxBG_STYLE_PAINT);
bgcolour = wxColour(config->display_bgcolour);
Bind(wxEVT_PAINT,&MuniMagnifier::OnPaint,this);
Bind(wxEVT_UPDATE_UI,&MuniMagnifier::OnUpdate,this);
Bind(EVT_SLEW,&MuniMagnifier::OnMouseMotion,this);
}
void MuniMagnifier::SetImage(const wxImage& i)
{
wxASSERT(i.IsOk());
// wxLogDebug("MuniMagnifierWindow::SetImage %d %d %d",i.IsOk(),i.GetWidth(),i.GetHeight());
image = i;
}
void MuniMagnifier::OnUpdate(wxUpdateUIEvent& event)
{
/*
wxLogDebug("MuniMagnifierWindow::OnUpdate %d %d %d %d",crosshair.x,crosshair.y,
int(image.IsOk()),int(canvas.IsOk()));
*/
event.SetUpdateInterval(40); // = 1/25 s
Refresh();
}
void MuniMagnifier::OnPaint(wxPaintEvent& event)
{
wxSize size(GetSize());
int w = size.GetWidth() / scale;
int h = size.GetHeight() / scale;
int i = size.GetWidth() / (2*scale);
int j = size.GetHeight() / (2*scale);
int x1 = crosshair.x - i;
int y1 = crosshair.y - j;
wxBrush brush(bgcolour);
wxPen pen(bgcolour);
wxPaintDC dc(this);
wxGraphicsContext *gc = wxGraphicsContext::Create(dc);
if( gc ) {
gc->SetBrush(brush);
gc->SetPen(pen);
gc->DrawRectangle(0,0,size.GetWidth(),size.GetHeight());
if( image.IsOk() && inside) {
wxRect rsub(x1,y1,w,h);
wxRect rimg(0,0,image.GetWidth(),image.GetHeight());
wxRect r = rimg.Intersect(rsub);
if( ! r.IsEmpty() ) {
wxImage sub(image.GetSubImage(r));
sub.Rescale(sub.GetWidth()*scale,sub.GetHeight()*scale,
wxIMAGE_QUALITY_NEAREST);
// offset
int xoff = x1 < 0 ? wxMax(size.GetWidth() - sub.GetWidth(),0) : 0;
int yoff = y1 < 0 ? wxMax(size.GetHeight()-sub.GetHeight(),0) : 0;
wxGraphicsBitmap bmp = gc->CreateBitmapFromImage(sub);
gc->DrawBitmap(bmp,xoff,yoff,sub.GetWidth(),sub.GetHeight());
}
}
int alpha = 200;
int s = scale * (zoom > 1.0 ? int(zoom + 0.5) : 1);
int ss = wxMax(int(scale * zoom),1);
int i1 = size.GetWidth() / 2 - ss / 2;
int j1 = size.GetHeight()/ 2 - ss / 2;
gc->SetBrush(*wxTRANSPARENT_BRUSH);
wxColour whitea(255,255,255,alpha);
gc->SetPen(wxPen(whitea));
gc->DrawRectangle(i1,j1,s,s);
wxColour blacka(0,0,0,alpha);
gc->SetPen(wxPen(blacka));
gc->DrawRectangle(i1-1,j1-1,s+2,s+2);
delete gc;
}
}
void MuniMagnifier::OnMouseMotion(MuniSlewEvent& event)
{
// wxLogDebug("MuniMagnifierWindow::OnMouseMotion %d %d",event.xsub,event.ysub);
inside = event.inside;
crosshair = wxPoint(event.xsub,event.ysub);
zoom = event.zoom;
}
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