Add wxIconEx

This simplifies loading DPI-aware icons.

Signed-off-by: Simon Rozman <simon@rozman.si>

src/icon.cpp

@@ -0,0 +1,39 @@
+/*
+    ​​​SPDX-License-Identifier: GPL-3.0-or-later
+    Copyright © 2025 Amebis
+*/
+
+#include "pch.h"
+
+static wxSize GetDPIHelper(const wxWindowBase* w)
+{
+    wxSize dpi;
+
+    if ( w )
+        dpi = w->GetDPI();
+    if ( !dpi.x || !dpi.y )
+        dpi = wxDisplay().GetPPI();
+    if ( !dpi.x || !dpi.y )
+        dpi = wxDisplay::GetStdPPI();
+
+    return dpi;
+}
+
+
+wxIconEx::wxIconEx(const wxString& name,
+                     wxBitmapType type,
+                     int desiredWidth, int desiredHeight,
+                     wxWindowBase *window)
+{
+    wxSize dpi = GetDPIHelper(window);
+    wxSize baseline = wxDisplay::GetStdPPI();
+
+    if (desiredWidth != wxDefaultCoord)
+        desiredWidth = wxMulDivInt32(desiredWidth, dpi.x, baseline.x);
+
+    if (desiredHeight != wxDefaultCoord)
+        desiredHeight = wxMulDivInt32(desiredHeight, dpi.y, baseline.y);
+
+    LoadFile(name, type, desiredWidth, desiredHeight);
+	SetScaleFactor((double)dpi.y / (double)baseline.y);
+}

src/pch.h

@@ -1,34 +1,35 @@
-/*
-    ​​​SPDX-License-Identifier: GPL-3.0-or-later
-    Copyright © 2015-2022 Amebis
-    Copyright © 2016 GÉANT
-*/
-
-#pragma once
-
-// Since including <wx/app.h> introduces wrong include order in 3.0.2,
-// include the grand <wx/wx.h> at a cost of longer pre-compilation phase.
-#include <codeanalysis\warnings.h>
-#pragma warning(push)
-#pragma warning(disable: ALL_CODE_ANALYSIS_WARNINGS 26812 26814)
-#include <wx/wx.h>
-#pragma warning(pop)
-
-#include "../include/wxex/aui/framemanager.h"
-
-#include "../include/wxex/persist/auimanager.h"
-#include "../include/wxex/persist/toplevel.h"
-
-#include "../include/wxex/appbar.h"
-#include "../include/wxex/comutils.h"
-#include "../include/wxex/crypto.h"
-#include "../include/wxex/hex.h"
-#include "../include/wxex/object.h"
-#include "../include/wxex/url.h"
-#include "../include/wxex/valhex.h"
-#include "../include/wxex/valnet.h"
-#include "../include/wxex/xml.h"
-
-#include "../include/wxex/common.h"
-
-#include "../include/wxex/private/tlwgeom.h"
+/*
+    ​​​SPDX-License-Identifier: GPL-3.0-or-later
+    Copyright © 2015-2022 Amebis
+    Copyright © 2016 GÉANT
+*/
+
+#pragma once
+
+// Since including <wx/app.h> introduces wrong include order in 3.0.2,
+// include the grand <wx/wx.h> at a cost of longer pre-compilation phase.
+#include <codeanalysis\warnings.h>
+#pragma warning(push)
+#pragma warning(disable: ALL_CODE_ANALYSIS_WARNINGS 26812 26814)
+#include <wx/wx.h>
+#pragma warning(pop)
+
+#include "../include/wxex/aui/framemanager.h"
+
+#include "../include/wxex/persist/auimanager.h"
+#include "../include/wxex/persist/toplevel.h"
+
+#include "../include/wxex/appbar.h"
+#include "../include/wxex/comutils.h"
+#include "../include/wxex/crypto.h"
+#include "../include/wxex/hex.h"
+#include "../include/wxex/icon.h"
+#include "../include/wxex/object.h"
+#include "../include/wxex/url.h"
+#include "../include/wxex/valhex.h"
+#include "../include/wxex/valnet.h"
+#include "../include/wxex/xml.h"
+
+#include "../include/wxex/common.h"
+
+#include "../include/wxex/private/tlwgeom.h"