/******************************************************************************
*
* Copyright (c) 2015 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer.
*
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*
* DropSink.cpp
*
*****************************************************************************/
//See http://www.ist.co.uk/motif/books/vol6A/ch-23.fm.html
//The XmNdestinationCallback is directly implemented into the List,
//Container, DrawingArea, Text and TextField widget classes
#include <oz++/motif/ApplicationView.h>
#include <oz++/StringT.h>
#include <oz++/motif/DC.h>
#include <oz++/motif/CompoundString.h>
#include <oz++/motif/RenderTable.h>
#include <oz++/motif/DrawingArea.h>
#include <oz++/motif/ValueTransfer.h>
namespace OZ {
class MainView :public ApplicationView {
private:
Atom COMPOUND_TEXT;
SmartPtr<RenderTable> rtable;
StringT<char> text;
SmartPtr<DrawingArea> drawingArea;
SmartPtr<ValueTransfer> valueTransfer;
void transfer(Action& action)
{
XmSelectionCallbackStruct *scs =
(XmSelectionCallbackStruct *) action.getCallData();
if (valueTransfer) {
printf("Target %ld \n", (long)scs -> target);
if ((scs->target == COMPOUND_TEXT)) {
printf("COMPOUND_TEXT transfer done; value=%s\n", (const char*)scs->value);
valueTransfer -> succeeded();
text = (const char*)scs -> value;
printf("New text %s\n", (const char*)text);
drawingArea -> update();
} else {
valueTransfer -> failed();
}
delete valueTransfer;
valueTransfer = NULL;
}
}
void destinationCallback(Action& action)
{
printf("MainView::destinationCallback \n");
XmDestinationCallbackStruct* dcs =
(XmDestinationCallbackStruct *)action.getCallData() ;
if (valueTransfer) {
delete valueTransfer;
}
valueTransfer = new ValueTransfer(this, dcs->transfer_id);
valueTransfer -> registerTransferProc(COMPOUND_TEXT,
this, (Callback)&MainView::transfer, NULL);
}
void expose(Action& action)
{
if (text.getLength()>0) {
CompoundString cs((const char*)text);
DC dc(drawingArea);
dc.setRenderTable(rtable->get());
cs.draw(10, 40, &dc);
}
}
public:
MainView(Application& applet, const char* name, Args& args)
:ApplicationView(applet, name, args) ,
text("This is a drawingArea as a DropSink")
{
Args ar;
ar.reset();
//CompoundString cs("Drop Receiver");
//ar.set(XmNlabelString, cs);
drawingArea = new DrawingArea(this, "drawingArea", ar);
drawingArea -> addCallback(XmNexposeCallback, this,
(Callback)&MainView::expose, NULL);
ar.reset();
ar.set(XmNfontSize, 20);
ar.set(XmNfontName, "Times-12");
rtable = new RenderTable(drawingArea, "", ar );
COMPOUND_TEXT = XmInternAtom(getDisplay(), (char*)"COMPOUND_TEXT", False);
Atom targets[1];
targets[0] = COMPOUND_TEXT;
ar.reset();
ar.set(XmNimportTargets, (XtArgVal)targets);
ar.set(XmNnumImportTargets, 1);
ar.set(XmNdropSiteOperations, XmDROP_COPY);
drawingArea -> dropSink(ar);
drawingArea -> addCallback(XmNdestinationCallback, this,
(Callback)&MainView::destinationCallback, NULL);
}
~MainView()
{
}
};
}
//
int main(int argc, char** argv)
{
try {
const char* appclass = argv[0];
Application applet(appclass, argc, argv);
Args args;
args.set(XmNgeometry, "600x100");
MainView view(applet, argv[0], args);
view.realize();
applet.run();
} catch (Exception& ex) {
caught(ex);
}
return 0;
}