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Implement per-screen DPI on Windows, DPI change event, wxDialog & wxFrame mixin base classes

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This commit is contained in:
Vojtech Kral 2019-04-02 12:00:50 +02:00
parent af05e5fc2c
commit 7e32f2df71
5 changed files with 159 additions and 2 deletions
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65
src/slic3r/GUI/GUI_Utils.hpp
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@ -8,10 +8,13 @@
#include <boost/optional.hpp>
#include <wx/frame.h>
#include <wx/dialog.h>
#include <wx/event.h>
#include <wx/filedlg.h>
#include <wx/gdicmn.h>
#include <wx/panel.h>
#include <wx/dcclient.h>
#include <wx/debug.h>
class wxCheckBox;
@ -27,6 +30,68 @@ wxTopLevelWindow* find_toplevel_parent(wxWindow *window);
void on_window_geometry(wxTopLevelWindow *tlw, std::function<void()> callback);
enum { DPI_DEFAULT = 96 };
int get_dpi_for_window(wxWindow *window);
struct DpiChangedEvent : public wxEvent {
int dpi;
wxRect rect;
DpiChangedEvent(wxEventType eventType, int dpi, wxRect rect)
: wxEvent(0, eventType), dpi(dpi), rect(rect)
{}
virtual wxEvent *Clone() const
{
return new DpiChangedEvent(*this);
}
};
wxDECLARE_EVENT(EVT_DPI_CHANGED, DpiChangedEvent);
template<class P> class DPIAware : public P
{
public:
DPIAware(wxWindow *parent, wxWindowID id, const wxString &title, const wxPoint &pos=wxDefaultPosition,
const wxSize &size=wxDefaultSize, long style=wxDEFAULT_FRAME_STYLE, const wxString &name=wxFrameNameStr)
: P(parent, id, title, pos, size, style, name)
{
m_scale_factor = (float)get_dpi_for_window(this) / (float)DPI_DEFAULT;
recalc_font();
this->Bind(EVT_DPI_CHANGED, [this](const DpiChangedEvent &evt) {
m_scale_factor = (float)evt.dpi / (float)DPI_DEFAULT;
on_dpi_changed(evt.rect);
});
}
virtual ~DPIAware() {}
float scale_factor() const { return m_scale_factor; }
int em_unit() const { return m_em_unit; }
int font_size() const { return m_font_size; }
protected:
virtual void on_dpi_changed(const wxRect &suggested_rect) = 0;
private:
int m_scale_factor;
int m_em_unit;
int m_font_size;
void recalc_font()
{
wxClientDC dc(this);
const auto metrics = dc.GetFontMetrics();
m_font_size = metrics.height;
m_em_unit = metrics.averageWidth;
}
};
typedef DPIAware<wxFrame> DPIFrame;
typedef DPIAware<wxDialog> DPIDialog;
class EventGuard
{