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- added Win32 native drag'n'drop code

Browse Source 
- added dnd support for Fl_Group (not tested with X!)
- added dnd support for Fl_Input (not tested with X!)
- no Mac implementation yet!

Go ahead: drag text or a file from the explorer into
a text widget! Tadaa!


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@1971 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Matthias Melcher
2002-02-24 17:52:18 +00:00
parent 0372675ee1
commit 4603756ed1
9 changed files with 502 additions and 56 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/Fl.cxx
+26 -5
View File
@@ -1,5 +1,5 @@
//
// "$Id: Fl.cxx,v 1.24.2.41.2.19 2002/02/20 19:29:57 easysw Exp $"
// "$Id: Fl.cxx,v 1.24.2.41.2.20 2002/02/24 17:52:17 matthiaswm Exp $"
//
// Main event handling code for the Fast Light Tool Kit (FLTK).
//
@@ -416,13 +416,17 @@ void Fl::focus(Fl_Widget *o) {
}
}
static char dnd_flag = 0; // make 'belowmouse' send DND_LEAVE instead of LEAVE
void Fl::belowmouse(Fl_Widget *o) {
if (grab()) return; // don't do anything while grab is on
Fl_Widget *p = belowmouse_;
if (o != p) {
Fl_Tooltip::enter(o);
if (!dnd_flag) Fl_Tooltip::enter(o);
belowmouse_ = o;
for (; p && !p->contains(o); p = p->parent()) p->handle(FL_LEAVE);
for (; p && !p->contains(o); p = p->parent()) {
p->handle(dnd_flag ? FL_DND_LEAVE : FL_LEAVE);
}
}
}
@@ -555,6 +559,21 @@ int Fl::handle(int event, Fl_Window* window)
window->show();
return 1;
case FL_DND_ENTER:
case FL_DND_DRAG:
dnd_flag = 1;
break;
case FL_DND_LEAVE:
dnd_flag = 1;
belowmouse(0);
dnd_flag = 0;
return true;
case FL_DND_RELEASE:
w = belowmouse();
break;
case FL_MOVE:
case FL_DRAG:
fl_xmousewin = window; // this should already be set, but just in case.
@@ -643,7 +662,9 @@ int Fl::handle(int event, Fl_Window* window)
break;
}
if (w && send(event, w, window)) return 1;
return send_handlers(event);
int ret = send_handlers(event);
dnd_flag = 0;
return ret;
}
////////////////////////////////////////////////////////////////
@@ -855,5 +876,5 @@ void Fl_Window::flush() {
}
//
// End of "$Id: Fl.cxx,v 1.24.2.41.2.19 2002/02/20 19:29:57 easysw Exp $".
// End of "$Id: Fl.cxx,v 1.24.2.41.2.20 2002/02/24 17:52:17 matthiaswm Exp $".
//
src/Fl_Group.cxx
+37 -5
View File
@@ -1,5 +1,5 @@
//
// "$Id: Fl_Group.cxx,v 1.8.2.8.2.10 2002/02/13 03:55:10 easysw Exp $"
// "$Id: Fl_Group.cxx,v 1.8.2.8.2.11 2002/02/24 17:52:17 matthiaswm Exp $"
//
// Group widget for the Fast Light Tool Kit (FLTK).
//
@@ -56,11 +56,28 @@ extern Fl_Widget* fl_oldfocus; // set by Fl::focus
static int send(Fl_Widget* o, int event) {
if (o->type() < FL_WINDOW) return o->handle(event);
switch ( event )
{
case FL_DND_ENTER:
case FL_DND_DRAG:
// figure out correct type of event:
event = (o->contains(Fl::belowmouse())) ? FL_DND_DRAG : FL_DND_ENTER;
}
int save_x = Fl::e_x; Fl::e_x -= o->x();
int save_y = Fl::e_y; Fl::e_y -= o->y();
int ret = o->handle(event);
Fl::e_y = save_y;
Fl::e_x = save_x;
switch ( event )
{
case FL_ENTER:
case FL_DND_ENTER:
// Successful completion of FL_ENTER means the widget is now the
// belowmouse widget, but only call Fl::belowmouse if the child
// widget did not do so:
if (!o->contains(Fl::belowmouse())) Fl::belowmouse(o);
break;
}
return ret;
}
@@ -156,6 +173,22 @@ int Fl_Group::handle(int event) {
Fl::belowmouse(this);
return 1;
case FL_DND_ENTER:
case FL_DND_DRAG:
for (i = children(); i--;) {
o = a[i];
if (o->takesevents() && Fl::event_inside(o)) {
if (o->contains(Fl::belowmouse())) {
return send(o,FL_DND_DRAG);
} else if (send(o,FL_DND_ENTER)) {
if (!o->contains(Fl::belowmouse())) Fl::belowmouse(o);
return 1;
}
}
}
Fl::belowmouse(this);
return 0;
case FL_PUSH:
Fl_Tooltip::exit(this); // tooltip
for (i = children(); i--;) {
@@ -212,8 +245,7 @@ int Fl_Group::handle(int event) {
if (children()) {
for (int j = i;;) {
if (child(j)->takesevents())
if (send(child(j), event)) return 1;
if (send(child(j), event)) return 1;
j++;
if (j >= children()) j = 0;
if (j == i) break;
@@ -416,7 +448,7 @@ short* Fl_Group::sizes() {
void Fl_Group::resize(int X, int Y, int W, int H) {
if (!resizable() || W==w() && H==h()) {
if (!resizable() || W==w() && H==h() ) {
if (type() < FL_WINDOW) {
int dx = X-x();
@@ -553,5 +585,5 @@ void Fl_Group::draw_outside_label(const Fl_Widget& w) const {
}
//
// End of "$Id: Fl_Group.cxx,v 1.8.2.8.2.10 2002/02/13 03:55:10 easysw Exp $".
// End of "$Id: Fl_Group.cxx,v 1.8.2.8.2.11 2002/02/24 17:52:17 matthiaswm Exp $".
//
src/Fl_Input.cxx
+81 -3
View File
@@ -1,5 +1,5 @@
//
// "$Id: Fl_Input.cxx,v 1.10.2.15.2.5 2002/01/01 15:11:30 easysw Exp $"
// "$Id: Fl_Input.cxx,v 1.10.2.15.2.6 2002/02/24 17:52:17 matthiaswm Exp $"
//
// Input widget for the Fast Light Tool Kit (FLTK).
//
@@ -34,6 +34,8 @@
#include <FL/fl_draw.H>
#include <string.h>
#define DND_OUT 1
void Fl_Input::draw() {
if (type() == FL_HIDDEN_INPUT) return;
Fl_Boxtype b = box();
@@ -211,7 +213,8 @@ int Fl_Input::handle_key() {
}
int Fl_Input::handle(int event) {
static int dnd_save_position, dnd_save_mark, drag_start = -1, newpos;
static Fl_Widget *dnd_save_focus;
switch (event) {
case FL_FOCUS:
switch (Fl::event_key()) {
@@ -248,12 +251,45 @@ int Fl_Input::handle(int event) {
} else return handle_key();
case FL_PUSH:
#if DND_OUT
{
int oldpos = position(), oldmark = mark();
Fl_Boxtype b = box();
Fl_Input_::handle_mouse(
x()+Fl::box_dx(b)+3, y()+Fl::box_dy(b),
w()-Fl::box_dw(b)-6, h()-Fl::box_dh(b), 0);
newpos = position();
position( oldpos, oldmark );
if (Fl::focus()==this && !Fl::event_state(FL_SHIFT) && type()!=FL_SECRET_INPUT &&
(newpos >= mark() && newpos < position() ||
newpos >= position() && newpos < mark())) {
// user clicked int the selection, may be trying to drag
drag_start = newpos;
return 1;
}
drag_start = -1;
}
#endif
if (Fl::focus() != this) {
Fl::focus(this);
handle(FL_FOCUS);
}
break;
case FL_DRAG:
#if DND_OUT
if (drag_start >= 0) {
if (Fl::event_is_click()) return 1; // debounce the mouse
// save the position because sometimes we don't get DND_ENTER:
dnd_save_position = position();
dnd_save_mark = mark();
// drag the data:
copy(); Fl::dnd();
return 1;
}
#endif
break;
case FL_RELEASE:
if (Fl::event_button() == 2) {
Fl::event_is_click(0); // stop double click from picking a word
@@ -264,6 +300,48 @@ int Fl_Input::handle(int event) {
}
return 1;
case FL_DND_ENTER:
Fl::belowmouse(this); // send the leave events first
dnd_save_position = position();
dnd_save_mark = mark();
dnd_save_focus = Fl::focus();
if (dnd_save_focus != this) {
Fl::focus(this);
handle(FL_FOCUS);
}
// fall through:
case FL_DND_DRAG:
//int p = mouse_position(X, Y, W, H);
#if DND_OUT_XXXX
if (Fl::focus()==this && (p>=dnd_save_position && p<=dnd_save_mark ||
p>=dnd_save_mark && p<=dnd_save_position)) {
position(dnd_save_position, dnd_save_mark);
return 0;
}
#endif
{
Fl_Boxtype b = box();
Fl_Input_::handle_mouse(
x()+Fl::box_dx(b)+3, y()+Fl::box_dy(b),
w()-Fl::box_dw(b)-6, h()-Fl::box_dh(b), 0);
}
return 1;
case FL_DND_LEAVE:
position(dnd_save_position, dnd_save_mark);
#if DND_OUT_XXXX
if (!focused())
#endif
if (dnd_save_focus != this) {
Fl::focus(dnd_save_focus);
handle(FL_UNFOCUS);
}
return 1;
case FL_DND_RELEASE:
take_focus();
return 1;
}
Fl_Boxtype b = box();
return Fl_Input_::handletext(event,
@@ -276,5 +354,5 @@ Fl_Input::Fl_Input(int x, int y, int w, int h, const char *l)
}
//
// End of "$Id: Fl_Input.cxx,v 1.10.2.15.2.5 2002/01/01 15:11:30 easysw Exp $".
// End of "$Id: Fl_Input.cxx,v 1.10.2.15.2.6 2002/02/24 17:52:17 matthiaswm Exp $".
//
src/Fl_cutpaste_win32.cxx
+14 -14
View File
@@ -1,5 +1,5 @@
//
// "$Id: Fl_cutpaste_win32.cxx,v 1.5.2.8.2.2 2002/01/01 15:11:31 easysw Exp $"
// "$Id: Fl_cutpaste_win32.cxx,v 1.5.2.8.2.3 2002/02/24 17:52:17 matthiaswm Exp $"
//
// WIN32 cut/paste for the Fast Light Tool Kit (FLTK).
//
@@ -35,8 +35,8 @@
#include <string.h>
#include <stdio.h>
static char *selection_buffer;
static int selection_length;
char *fl_selection_buffer;
int fl_selection_length;
static int selection_buffer_length;
static char beenhere;
static char ignore_destroy;
@@ -59,11 +59,11 @@ static int selection_xevent_handler(int) {
EmptyClipboard();
// fall through...
case WM_RENDERFORMAT: {
HANDLE h = GlobalAlloc(GHND, selection_length+1);
HANDLE h = GlobalAlloc(GHND, fl_selection_length+1);
if (h) {
LPSTR p = (LPSTR)GlobalLock(h);
memcpy(p, selection_buffer, selection_length);
p[selection_length] = 0;
memcpy(p, fl_selection_buffer, fl_selection_length);
p[fl_selection_length] = 0;
GlobalUnlock(h);
SetClipboardData(CF_TEXT, h);
}
@@ -82,13 +82,13 @@ static int selection_xevent_handler(int) {
void Fl::selection(Fl_Widget &owner, const char *stuff, int len) {
if (!stuff || len<0) return;
if (len+1 > selection_buffer_length) {
delete[] selection_buffer;
selection_buffer = new char[len+100];
delete[] fl_selection_buffer;
fl_selection_buffer = new char[len+100];
selection_buffer_length = len+100;
}
memcpy(selection_buffer, stuff, len);
selection_buffer[len] = 0; // needed for direct paste
selection_length = len;
memcpy(fl_selection_buffer, stuff, len);
fl_selection_buffer[len] = 0; // needed for direct paste
fl_selection_length = len;
ignore_destroy = 1;
if (OpenClipboard(fl_xid(Fl::first_window()))) {
EmptyClipboard();
@@ -111,8 +111,8 @@ void Fl::paste(Fl_Widget &receiver) {
// We already have it, do it quickly without window server.
// Notice that the text is clobbered if set_selection is
// called in response to FL_PASTE!
Fl::e_text = selection_buffer;
Fl::e_length = selection_length;
Fl::e_text = fl_selection_buffer;
Fl::e_length = fl_selection_length;
receiver.handle(FL_PASTE);
} else {
if (!OpenClipboard(fl_xid(Fl::first_window()))) return;
@@ -135,5 +135,5 @@ void Fl::paste(Fl_Widget &receiver) {
}
//
// End of "$Id: Fl_cutpaste_win32.cxx,v 1.5.2.8.2.2 2002/01/01 15:11:31 easysw Exp $".
// End of "$Id: Fl_cutpaste_win32.cxx,v 1.5.2.8.2.3 2002/02/24 17:52:17 matthiaswm Exp $".
//
src/Fl_win32.cxx
+11 -2
View File
@@ -1,5 +1,5 @@
//
// "$Id: Fl_win32.cxx,v 1.33.2.37.2.17 2002/02/20 19:29:57 easysw Exp $"
// "$Id: Fl_win32.cxx,v 1.33.2.37.2.18 2002/02/24 17:52:17 matthiaswm Exp $"
//
// WIN32-specific code for the Fast Light Tool Kit (FLTK).
//
@@ -45,6 +45,8 @@
#include <ctype.h>
#include <winuser.h>
#include <commctrl.h>
#include <ole2.h>
#include <ShellApi.h>
//
@@ -117,6 +119,8 @@ static fd_set fdsets[3];
#define POLLOUT 4
#define POLLERR 8
extern class FLDropTarget flDropTarget;
static int nfds = 0;
static int fd_array_size = 0;
static struct FD {
@@ -935,6 +939,11 @@ Fl_X* Fl_X::make(Fl_Window* w) {
// other windows from the code, or we loose the capture.
ShowWindow(x->xid, !showit ? SW_SHOWMINNOACTIVE :
(Fl::grab() || (style & WS_POPUP)) ? SW_SHOWNOACTIVATE : SW_SHOWNORMAL);
// register all windows for potential drag'n'drop operations
{ static char oleInitialized = 0;
if (!oleInitialized) { OleInitialize(0L); oleInitialized=1; }
}
RegisterDragDrop(x->xid, (IDropTarget*)&flDropTarget);
if (w->modal()) {Fl::modal_ = w; fl_fix_focus();}
return x;
@@ -1065,5 +1074,5 @@ void Fl_Window::make_current() {
}
//
// End of "$Id: Fl_win32.cxx,v 1.33.2.37.2.17 2002/02/20 19:29:57 easysw Exp $".
// End of "$Id: Fl_win32.cxx,v 1.33.2.37.2.18 2002/02/24 17:52:17 matthiaswm Exp $".
//
src/fl_dnd.cxx
+4 -4
View File
@@ -1,5 +1,5 @@
//
// "$Id: fl_dnd.cxx,v 1.3.2.1 2002/01/09 21:50:02 easysw Exp $"
// "$Id: fl_dnd.cxx,v 1.3.2.2 2002/02/24 17:52:18 matthiaswm Exp $"
//
// Drag & Drop code for the Fast Light Tool Kit (FLTK).
//
@@ -25,12 +25,12 @@
#ifdef WIN32
# include "fl_dnd_win32.cxx"
//#elif defined(__APPLE__)
//# include "fl_dnd_mac.cxx"
#elif defined(__APPLE__)
# include "fl_dnd_mac.cxx"
#else
# include "fl_dnd_x.cxx"
#endif
//
// End of "$Id: fl_dnd.cxx,v 1.3.2.1 2002/01/09 21:50:02 easysw Exp $".
// End of "$Id: fl_dnd.cxx,v 1.3.2.2 2002/02/24 17:52:18 matthiaswm Exp $".
//
src/fl_dnd_win32.cxx
+308 -23
View File
@@ -1,5 +1,5 @@
//
// "$Id: fl_dnd_win32.cxx,v 1.5.2.1 2002/01/09 21:50:02 easysw Exp $"
// "$Id: fl_dnd_win32.cxx,v 1.5.2.2 2002/02/24 17:52:18 matthiaswm Exp $"
//
// Drag & Drop code for the Fast Light Tool Kit (FLTK).
//
@@ -22,34 +22,319 @@
//
// Please report all bugs and problems to "fltk-bugs@fltk.org
// This file contains win32-specific code for fltk which is always linked
// in. Search other files for "WIN32" or filenames ending in _win32.cxx
// for other system-specific code.
// Dummy version of dnd for now, it waits until the FL_RELEASE and
// then does nothing. The real version should drag the ascii text stored
// in selection_buffer (length = selection_length) and drop it on the
// target. It should either not return until the mouse is released
// or it should cause the DRAG+RELEASE events to not be passed to the
// program somehow. I'm pretty sure this is a simple call in _WIN32:
#include <config.h>
#include <FL/Fl.H>
#include <FL/win32.H>
#include <FL/Fl_Window.H>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <time.h>
#if defined(__CYGWIN__)
#include <sys/time.h>
#include <unistd.h>
#else
#include <winsock.h>
#endif
#include <ctype.h>
#include <fltk/Fl.h>
#include <fltk/Fl_Window.h>
#include <ole2.h>
#include <ShellAPI.h>
static int grabfunc(int event) {
if (event == FL_RELEASE) Fl::pushed(0);
extern char *fl_selection_buffer;
extern int fl_selection_length;
Fl_Window *fl_dnd_target_window = 0;
/**
* subclass the IDropTarget to receive data from DnD operations
*/
class FLDropTarget : public IDropTarget
{
DWORD m_cRefCount;
DWORD lastEffect;
int px, py;
public:
FLDropTarget() : m_cRefCount(0) { } // initialize
HRESULT STDMETHODCALLTYPE QueryInterface( REFIID riid, LPVOID *ppvObject ) {
if (IID_IUnknown==riid || IID_IDropTarget==riid)
{
*ppvObject=this;
((LPUNKNOWN)*ppvObject)->AddRef();
return S_OK;
}
*ppvObject = NULL;
return E_NOINTERFACE;
}
ULONG STDMETHODCALLTYPE AddRef() { return ++m_cRefCount; }
ULONG STDMETHODCALLTYPE Release() {
long nTemp;
nTemp = --m_cRefCount;
if(nTemp==0)
delete this;
return nTemp;
}
HRESULT STDMETHODCALLTYPE DragEnter( IDataObject *pDataObj, DWORD grfKeyState, POINTL pt, DWORD *pdwEffect) {
if( !pDataObj ) return E_INVALIDARG;
// set e_modifiers here from grfKeyState, set e_x and e_root_x
// check if FLTK handles this drag and return if it can't (i.e. BMP drag without filename)
POINT ppt;
Fl::e_x_root = ppt.x = pt.x;
Fl::e_y_root = ppt.y = pt.y;
HWND hWnd = WindowFromPoint( ppt );
Fl_Window *target = fl_find( hWnd );
if (target) {
Fl::e_x = Fl::e_x_root-target->x();
Fl::e_y = Fl::e_y_root-target->y();
}
fl_dnd_target_window = target;
px = pt.x; py = pt.y;
// FLTK has no mechanism yet for the different drop effects, so we allow move and copy
if ( target && Fl::handle( FL_DND_ENTER, target ) )
*pdwEffect = DROPEFFECT_MOVE|DROPEFFECT_COPY; //|DROPEFFECT_LINK;
else
*pdwEffect = DROPEFFECT_NONE;
lastEffect = *pdwEffect;
return S_OK;
}
HRESULT STDMETHODCALLTYPE DragOver( DWORD grfKeyState, POINTL pt, DWORD *pdwEffect) {
if ( px==pt.x && py==pt.y )
{
*pdwEffect = lastEffect;
return S_OK;
}
if ( !fl_dnd_target_window )
{
*pdwEffect = lastEffect = DROPEFFECT_NONE;
return S_OK;
}
// set e_modifiers here from grfKeyState, set e_x and e_root_x
Fl::e_x_root = pt.x;
Fl::e_y_root = pt.y;
if (fl_dnd_target_window) {
Fl::e_x = Fl::e_x_root-fl_dnd_target_window->x();
Fl::e_y = Fl::e_y_root-fl_dnd_target_window->y();
}
// Fl_Group will change DND_DRAG into DND_ENTER and DND_LEAVE if needed
if ( Fl::handle( FL_DND_DRAG, fl_dnd_target_window ) )
*pdwEffect = DROPEFFECT_MOVE|DROPEFFECT_COPY|DROPEFFECT_LINK;
else
*pdwEffect = DROPEFFECT_NONE;
px = pt.x; py = pt.y;
lastEffect = *pdwEffect;
return S_OK;
}
HRESULT STDMETHODCALLTYPE DragLeave() {
if ( fl_dnd_target_window )
{
Fl::handle( FL_DND_LEAVE, fl_dnd_target_window );
fl_dnd_target_window = 0;
}
return S_OK;
}
HRESULT STDMETHODCALLTYPE Drop( IDataObject *data, DWORD grfKeyState, POINTL pt, DWORD *pdwEffect) {
if ( !fl_dnd_target_window )
return S_OK;
Fl_Window *target = fl_dnd_target_window;
fl_dnd_target_window = 0;
Fl::e_x_root = pt.x;
Fl::e_y_root = pt.y;
if (target) {
Fl::e_x = Fl::e_x_root-target->x();
Fl::e_y = Fl::e_y_root-target->y();
}
// tell FLTK that the user released an object on this widget
if ( !Fl::handle( FL_DND_RELEASE, target ) )
return S_OK;
Fl_Widget *w = target;
while (w->parent()) w = w->window();
HWND hwnd = fl_xid( (Fl_Window*)w );
FORMATETC fmt = { 0 };
STGMEDIUM medium = { 0 };
fmt.tymed = TYMED_HGLOBAL;
fmt.dwAspect = DVASPECT_CONTENT;
fmt.lindex = -1;
fmt.cfFormat = CF_TEXT;
// if it is ASCII text, send an FL_PASTE with that text
if ( data->GetData( &fmt, &medium )==S_OK )
{
void *stuff = GlobalLock( medium.hGlobal );
//long len = GlobalSize( medium.hGlobal );
Fl::e_length = strlen( (char*)stuff ); // min(strlen, len)
Fl::e_text = (char*)stuff;
target->handle(FL_PASTE); // e_text will be invalid after this call
GlobalUnlock( medium.hGlobal );
ReleaseStgMedium( &medium );
SetForegroundWindow( hwnd );
return S_OK;
}
fmt.tymed = TYMED_HGLOBAL;
fmt.dwAspect = DVASPECT_CONTENT;
fmt.lindex = -1;
fmt.cfFormat = CF_HDROP;
// if it is a pathname list, send an FL_PASTE with a \n seperated list of filepaths
if ( data->GetData( &fmt, &medium )==S_OK )
{
HDROP hdrop = (HDROP)medium.hGlobal;
int i, n, nn = 0, nf = DragQueryFile( hdrop, (UINT)-1, 0, 0 );
for ( i=0; i<nf; i++ ) nn += DragQueryFile( hdrop, i, 0, 0 );
nn += nf;
Fl::e_length = nn-1;
char *dst = Fl::e_text = (char*)malloc(nn+1);
for ( i=0; i<nf; i++ ) {
n = DragQueryFile( hdrop, i, dst, nn );
dst += n;
if ( i<nf-1 ) *dst++ = '\n';
}
*dst = 0;
target->handle(FL_PASTE);
free( Fl::e_text );
ReleaseStgMedium( &medium );
SetForegroundWindow( hwnd );
return S_OK;
}
return S_OK;
}
} flDropTarget;
/**
* this class is needed to allow FLTK apps to be a DnD source
*/
class FLDropSource : public IDropSource
{
DWORD m_cRefCount;
public:
FLDropSource() { m_cRefCount = 0; }
HRESULT STDMETHODCALLTYPE QueryInterface( REFIID riid, LPVOID *ppvObject ) {
if (IID_IUnknown==riid || IID_IDropSource==riid)
{
*ppvObject=this;
((LPUNKNOWN)*ppvObject)->AddRef();
return S_OK;
}
*ppvObject = NULL;
return E_NOINTERFACE;
}
ULONG STDMETHODCALLTYPE AddRef() { return ++m_cRefCount; }
ULONG STDMETHODCALLTYPE Release() {
long nTemp;
nTemp = --m_cRefCount;
if(nTemp==0)
delete this;
return nTemp;
}
STDMETHODIMP GiveFeedback( ulong ) { return DRAGDROP_S_USEDEFAULTCURSORS; }
STDMETHODIMP QueryContinueDrag( BOOL esc, DWORD keyState ) {
if ( esc )
return DRAGDROP_S_CANCEL;
if ( !(keyState & MK_LBUTTON) )
return DRAGDROP_S_DROP;
return S_OK;
}
};
/**
* this is the actual object that FLTK can drop somewhere
* - the implementation is minimal, but it should work with all decent Win32 drop targets
*/
class FLDataObject : public IDataObject
{
DWORD m_cRefCount;
public:
FLDataObject() { m_cRefCount = 1; }
HRESULT STDMETHODCALLTYPE QueryInterface( REFIID riid, LPVOID *ppvObject ) {
if (IID_IUnknown==riid || IID_IDataObject==riid)
{
*ppvObject=this;
((LPUNKNOWN)*ppvObject)->AddRef();
return S_OK;
}
*ppvObject = NULL;
return E_NOINTERFACE;
}
ULONG STDMETHODCALLTYPE AddRef() { return ++m_cRefCount; }
ULONG STDMETHODCALLTYPE Release() {
long nTemp;
nTemp = --m_cRefCount;
if(nTemp==0)
delete this;
return nTemp;
}
// GetData currently allows ASCII text through Global Memory only
HRESULT STDMETHODCALLTYPE GetData( FORMATETC *pformatetcIn, STGMEDIUM *pmedium ) {
if ((pformatetcIn->dwAspect & DVASPECT_CONTENT) &&
(pformatetcIn->tymed & TYMED_HGLOBAL) &&
(pformatetcIn->cfFormat == CF_TEXT))
{
HGLOBAL gh = GlobalAlloc( GHND, fl_selection_length+1 );
char *pMem = (char*)GlobalLock( gh );
memmove( pMem, fl_selection_buffer, fl_selection_length ); pMem[ fl_selection_length ] = 0;
pmedium->tymed = TYMED_HGLOBAL;
pmedium->hGlobal = gh;
pmedium->pUnkForRelease = NULL;
GlobalUnlock( gh );
return S_OK;
}
return DV_E_FORMATETC;
}
HRESULT STDMETHODCALLTYPE QueryGetData( FORMATETC *pformatetc )
{
if ((pformatetc->dwAspect & DVASPECT_CONTENT) &&
(pformatetc->tymed & TYMED_HGLOBAL) &&
(pformatetc->cfFormat == CF_TEXT))
return S_OK;
return DV_E_FORMATETC;
}
// all the following methods are not really needed for a DnD object
HRESULT STDMETHODCALLTYPE GetDataHere( FORMATETC *pformatetcIn, STGMEDIUM *pmedium) { return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE GetCanonicalFormatEtc( FORMATETC *in, FORMATETC *out) { return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE SetData( FORMATETC *pformatetc, STGMEDIUM *pmedium, BOOL fRelease) { return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE EnumFormatEtc( DWORD dir, IEnumFORMATETC **ppenumFormatEtc) { return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE DAdvise( FORMATETC *pformatetc, DWORD advf,
IAdviseSink *pAdvSink, DWORD *pdwConnection) { return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE DUnadvise( DWORD dwConnection) { return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE EnumDAdvise( IEnumSTATDATA **ppenumAdvise) { return E_NOTIMPL; }
};
/**
* drag and drop whatever is in the cut-copy-paste buffer
* - create a selection first using:
* Fl::selection(Fl_Widget &owner, const char *stuff, int len)
*/
int Fl::dnd()
{
DWORD dropEffect;
ReleaseCapture();
FLDataObject *fdo = new FLDataObject;
fdo->AddRef();
FLDropSource *fds = new FLDropSource;
fds->AddRef();
HRESULT ret = DoDragDrop( fdo, fds, DROPEFFECT_MOVE|DROPEFFECT_LINK|DROPEFFECT_COPY, &dropEffect );
fdo->Release();
fds->Release();
Fl_Widget *w = Fl::pushed();
if ( w )
{
w->handle( FL_RELEASE );
Fl::pushed( 0 );
}
if ( ret==DRAGDROP_S_DROP ) return true; // or DD_S_CANCEL
return false;
}
extern int (*fl_local_grab)(int); // in Fl.cxx
int Fl::dnd() {
Fl::first_window()->cursor(FL_CURSOR_HAND);
fl_local_grab = grabfunc;
while (Fl::pushed()) Fl::wait();
Fl::first_window()->cursor(FL_CURSOR_DEFAULT);
fl_local_grab = 0;
return true;
}
//
// End of "$Id: fl_dnd_win32.cxx,v 1.5.2.1 2002/01/09 21:50:02 easysw Exp $".
// End of "$Id: fl_dnd_win32.cxx,v 1.5.2.2 2002/02/24 17:52:18 matthiaswm Exp $".
//
visualc/fltk.lib.dsp
+4
View File
@@ -239,6 +239,10 @@ SOURCE=..\src\Fl_display.cxx
# End Source File
# Begin Source File
SOURCE=..\src\fl_dnd.cxx
# End Source File
# Begin Source File
SOURCE=..\src\Fl_Double_Window.cxx
# End Source File
# Begin Source File
visualc/fltkdll.dsp
+17
View File
@@ -611,6 +611,23 @@ DEP_CPP_FL_DIS=\
# End Source File
# Begin Source File
SOURCE=..\src\fl_dnd.cxx
DEP_CPP_FL_DN=\
"..\fl\enumerations.h"\
"..\fl\fl.h"\
"..\fl\fl_export.h"\
"..\fl\fl_group.h"\
"..\fl\fl_widget.h"\
"..\fl\fl_window.h"\
"..\fl\mac.H"\
"..\fl\win32.h"\
"..\fl\x.h"\
"..\src\fl_dnd_win32.cxx"\
".\config.h"\
# End Source File
# Begin Source File
SOURCE=..\src\Fl_Double_Window.cxx
DEP_CPP_FL_DO=\
"..\fl\enumerations.h"\