Rewrite the Fl_Copy_Surface class with strict separation of public API and platform-related code.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11257 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

2 files changed, 121 insertions, 0 deletions

diff --git a/src/drivers/GDI/Fl_GDI_Copy_Surface.H b/src/drivers/GDI/Fl_GDI_Copy_Surface.H
new file mode 100644
index 000000000..d5beaaa98
--- /dev/null
+++ b/src/drivers/GDI/Fl_GDI_Copy_Surface.H
@@ -0,0 +1,46 @@
+//
+// "$Id: Fl_GDI_Copy_Surface.H 11241 2016-02-27 13:52:27Z manolo $"
+//
+// Copy-to-clipboard code for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 1998-2016 by Bill Spitzak and others.
+//
+// This library is free software. Distribution and use rights are outlined in
+// the file "COPYING" which should have been included with this file.  If this
+// file is missing or damaged, see the license at:
+//
+//     http://www.fltk.org/COPYING.php
+//
+// Please report all bugs and problems on the following page:
+//
+//     http://www.fltk.org/str.php
+//
+
+
+#ifndef Fl_GDI_Copy_Surface_h
+#define Fl_GDI_Copy_Surface_h
+
+#include <FL/Fl_Copy_Surface.H>
+#include "Fl_GDI_Graphics_Driver.H"
+
+class Fl_Copy_Surface::Helper : public Fl_Widget_Surface {
+  friend class Fl_Copy_Surface;
+private:
+  int width;
+  int height;
+  HDC oldgc;
+  HDC gc;
+  Helper(int w, int h);
+  ~Helper();
+  void set_current();
+  void translate(int x, int y);
+  void untranslate();
+  int w() {return width;}
+  int h() {return height;}
+};
+
+#endif /* Fl_GDI_Copy_Surface_h */
+
+//
+// End of "$Id: Fl_Copy_Surface.H 11220 2016-02-26 12:51:47Z manolo $".
+//
diff --git a/src/drivers/GDI/Fl_GDI_Copy_Surface.cxx b/src/drivers/GDI/Fl_GDI_Copy_Surface.cxx
new file mode 100644
index 000000000..bb05377ff
--- /dev/null
+++ b/src/drivers/GDI/Fl_GDI_Copy_Surface.cxx
@@ -0,0 +1,75 @@
+//
+// "$Id: Fl_GDI_Copy_Surface.cxx 11241 2016-02-27 13:52:27Z manolo $"
+//
+// Copy-to-clipboard code for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 1998-2016 by Bill Spitzak and others.
+//
+// This library is free software. Distribution and use rights are outlined in
+// the file "COPYING" which should have been included with this file.  If this
+// file is missing or damaged, see the license at:
+//
+//     http://www.fltk.org/COPYING.php
+//
+// Please report all bugs and problems on the following page:
+//
+//     http://www.fltk.org/str.php
+//
+
+#include "Fl_GDI_Copy_Surface.H"
+
+Fl_Copy_Surface::Helper::Helper(int w, int h) : Fl_Widget_Surface(NULL) {
+  width = w;
+  height = h;
+  driver(new Fl_Translated_GDI_Graphics_Driver);
+  oldgc = (HDC)Fl_Surface_Device::surface()->driver()->gc();
+  // exact computation of factor from screen units to EnhMetaFile units (0.01 mm)
+  HDC hdc = GetDC(NULL);
+  int hmm = GetDeviceCaps(hdc, HORZSIZE);
+  int hdots = GetDeviceCaps(hdc, HORZRES);
+  int vmm = GetDeviceCaps(hdc, VERTSIZE);
+  int vdots = GetDeviceCaps(hdc, VERTRES);
+  ReleaseDC(NULL, hdc);
+  float factorw = (100.f * hmm) / hdots;
+  float factorh = (100.f * vmm) / vdots;
+  
+  RECT rect; rect.left = 0; rect.top = 0; rect.right = (LONG)(w * factorw); rect.bottom = (LONG)(h * factorh);
+  gc = CreateEnhMetaFile (NULL, NULL, &rect, NULL);
+  if (gc != NULL) {
+    SetTextAlign(gc, TA_BASELINE|TA_LEFT);
+    SetBkMode(gc, TRANSPARENT);
+  }
+}
+
+Fl_Copy_Surface::Helper::~Helper() {
+  if (oldgc == (HDC)Fl_Surface_Device::surface()->driver()->gc()) oldgc = NULL;
+  HENHMETAFILE hmf = CloseEnhMetaFile (gc);
+  if ( hmf != NULL ) {
+    if ( OpenClipboard (NULL) ){
+      EmptyClipboard ();
+      SetClipboardData (CF_ENHMETAFILE, hmf);
+      CloseClipboard ();
+    }
+    DeleteEnhMetaFile(hmf);
+  }
+  DeleteDC(gc);
+  Fl_Surface_Device::surface()->driver()->gc(oldgc);
+}
+
+void Fl_Copy_Surface::Helper::set_current() {
+  driver()->gc(gc);
+  fl_window = (Window)1;
+  Fl_Surface_Device::set_current();
+}
+
+void Fl_Copy_Surface::Helper::translate(int x, int y) {
+  ((Fl_Translated_GDI_Graphics_Driver*)driver())->translate_all(x, y);
+}
+
+void Fl_Copy_Surface::Helper::untranslate() {
+  ((Fl_Translated_GDI_Graphics_Driver*)driver())->untranslate_all();
+}
+
+//
+// End of "$Id: Fl_Copy_Surface.H 11220 2016-02-26 12:51:47Z manolo $".
+//