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sxy_task_mvlegend.cpp

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// =======================================================================

char *task_mvlegend_cpp = "$Id: sxy_task_mvlegend.cpp,v 1.1 2002/11/25 19:52:05 clinio Exp $";

// =======================================================================

#include <assert.h>
#include <cd.h>
#include <xy.h>

#include "sxy_chart.h"
#include "sxy_graph.h"
#include "sxy_task.h"
#include "sxy_task_mvlegend.h"

// =======================================================================

SXYTaskReturn SXYTaskMoveLegend::mouseClick(SXYGraph* graph, int b, int x, int y, 
int sft, int ctr) {
   if ( b != 1 ) return CALLBACK_NOT_TREATED;
   int cht = graph->getChartOfEvent(x, y);
   if (cht < 0) return CALLBACK_NOT_TREATED;

   SXYChart* chart = graph->getChart(cht);
   XYLegend* leg = chart->getXyLegend();
   if ( leg == NULL ) return CALLBACK_NOT_TREATED;
   if ( !leg->pick(x, y) ) return CALLBACK_NOT_TREATED;

   legend = leg;
   is_moving = 1;
   ref_x = x; ref_y = y;
   shift_x = 0; shift_y = 0;
   drawFence();

   return CALLBACK_TREATED;
}

// ......................................................................
//
SXYTaskReturn SXYTaskMoveLegend::mouseUnclick(SXYGraph* graph, int b, int x, int y, 
int sft, int ctr) {
   if ( !is_moving ) return CALLBACK_NOT_TREATED;

   if ( b != 1 ) return CALLBACK_NOT_TREATED;
   int cht = graph->getChartOfEvent(x, y);
   if (cht < 0) return CALLBACK_NOT_TREATED;

   drawFence();
   translateLegend();
   shift_x = 0; shift_y = 0;
   ref_x = x; ref_y = y;
   is_moving = 0;
   legend = NULL;
   graph->redrawGraph();

   return CALLBACK_TREATED;
}

// ......................................................................

SXYTaskReturn SXYTaskMoveLegend::mouseMotion(SXYGraph* graph, int x, int y, 
int sft, int ctr) {
   if ( !is_moving ) return CALLBACK_NOT_TREATED;
   int cht = graph->getChartOfEvent(x, y);
   if (cht < 0) return CALLBACK_NOT_TREATED;

   drawFence();
   shift_x = x - ref_x;
   shift_y = y - ref_y;
   drawFence();

   return CALLBACK_TREATED;
}

// ......................................................................

SXYTaskReturn SXYTaskMoveLegend::mouseEnter(SXYGraph* graph) {
   is_moving = 0;
   graph->redrawGraph();
   return CALLBACK_NOT_TREATED;
}

// ......................................................................

SXYTaskReturn SXYTaskMoveLegend::mouseLeave(SXYGraph* graph) {
   is_moving = 0;
   graph->redrawGraph();
   return CALLBACK_NOT_TREATED;
}

// ......................................................................

void SXYTaskMoveLegend::drawFence(void) {
   int bxmin, bymin, bxmax, bymax;
   legend->boundingBox(bxmin, bymin, bxmax, bymax);
   int old_write_mode = cdWriteMode( CD_NOT_XOR );
   long int old_color = cdForeground( getXorColor() );

   bxmin += shift_x; bymin += shift_y;
   bxmax += shift_x; bymax += shift_y;
   cdRect( bxmin, bxmax, bymin, bymax );

   cdWriteMode( old_write_mode );
   cdForeground( old_color );
}

// ......................................................................

void SXYTaskMoveLegend::translateLegend(void) {
   int xp, yp;
   assert(legend);
   legend->position(&xp, &yp);
   xp += shift_x; yp += shift_y;
   legend->position(xp, yp);
}

// ......................................................................

SXYTaskMoveLegend::SXYTaskMoveLegend(void) {
   is_moving = 0;
   shift_x = 0; shift_y = 0;
   ref_x = 0;   ref_y = 0;
   legend = NULL;
}

// ......................................................................

SXYTaskMoveLegend::~SXYTaskMoveLegend() {
   legend = NULL;
};

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SXY
Tecgraf / PUC-Rio - Computer Graphics Technology Group