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/*
* Smithsonian Astrophysical Observatory, Cambridge, MA, USA
* This code has been modified under the terms listed below and is made
* available under the same terms.
*/
/*
* Copyright 1993-2004 George A Howlett.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
* KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
* OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
extern "C" {
#include "bltGraph.h"
}
#include "bltGrHairs.h"
#include "bltGrMisc.h"
#include "bltConfig.h"
#define PointInGraph(g,x,y) (((x) <= (g)->right_) && ((x) >= (g)->left_) && ((y) <= (g)->bottom_) && ((y) >= (g)->top_))
static Tk_OptionSpec optionSpecs[] = {
{TK_OPTION_COLOR, "-color", "color", "Color",
"green", -1, Tk_Offset(CrosshairsOptions, colorPtr), 0, NULL, 0},
{TK_OPTION_CUSTOM, "-dashes", "dashes", "Dashes",
NULL, -1, Tk_Offset(CrosshairsOptions, dashes),
TK_OPTION_NULL_OK, &dashesObjOption, 0},
{TK_OPTION_BOOLEAN, "-hide", "hide", "Hide",
"yes", -1, Tk_Offset(CrosshairsOptions, hide), 0, NULL, 0},
{TK_OPTION_PIXELS, "-linewidth", "lineWidth", "Linewidth",
"0", -1, Tk_Offset(CrosshairsOptions, lineWidth), 0, NULL, 0},
{TK_OPTION_PIXELS, "-x", "x", "X",
"0", -1, Tk_Offset(CrosshairsOptions, x), 0, NULL, 0},
{TK_OPTION_PIXELS, "-y", "y", "Y",
"0", -1, Tk_Offset(CrosshairsOptions, y), 0, NULL, 0},
{TK_OPTION_END, NULL, NULL, NULL, NULL, -1, 0, 0, NULL, 0}
};
Crosshairs::Crosshairs(Graph* graphPtr)
{
ops_ = (CrosshairsOptions*)calloc(1, sizeof(CrosshairsOptions));
graphPtr_ = graphPtr;
visible_ =0;
gc_ =NULL;
optionTable_ = Tk_CreateOptionTable(graphPtr->interp_, optionSpecs);
Tk_InitOptions(graphPtr->interp_, (char*)ops_, optionTable_, graphPtr->tkwin_);
}
Crosshairs::~Crosshairs()
{
if (gc_)
Blt_FreePrivateGC(graphPtr_->display_, gc_);
Tk_FreeConfigOptions((char*)ops_, optionTable_, graphPtr_->tkwin_);
free(ops_);
}
// Configure
void Crosshairs::configure()
{
CrosshairsOptions* ops = (CrosshairsOptions*)ops_;
GraphOptions* gops = (GraphOptions*)graphPtr_->ops_;
// Turn off the crosshairs temporarily. This is in case the new
// configuration changes the size, style, or position of the lines.
off();
XGCValues gcValues;
gcValues.function = GXxor;
unsigned long int pixel = Tk_3DBorderColor(gops->plotBg)->pixel;
gcValues.background = pixel;
gcValues.foreground = (pixel ^ ops->colorPtr->pixel);
gcValues.line_width = ops->lineWidth;
unsigned long gcMask =
(GCForeground | GCBackground | GCFunction | GCLineWidth);
if (LineIsDashed(ops->dashes)) {
gcValues.line_style = LineOnOffDash;
gcMask |= GCLineStyle;
}
GC newGC = Blt_GetPrivateGC(graphPtr_->tkwin_, gcMask, &gcValues);
if (LineIsDashed(ops->dashes))
Blt_SetDashes(graphPtr_->display_, newGC, &ops->dashes);
if (gc_ != NULL)
Blt_FreePrivateGC(graphPtr_->display_, gc_);
gc_ = newGC;
// Are the new coordinates on the graph?
segArr_[0].x1 = ops->x;
segArr_[0].x2 = ops->x;
segArr_[0].y1 = graphPtr_->bottom_;
segArr_[0].y2 = graphPtr_->top_;
segArr_[1].y1 = ops->y;
segArr_[1].y2 = ops->y;
segArr_[1].x1 = graphPtr_->left_;
segArr_[1].x2 = graphPtr_->right_;
enable();
}
void Crosshairs::enable()
{
CrosshairsOptions* ops = (CrosshairsOptions*)ops_;
if (!ops->hide)
on();
}
void Crosshairs::disable()
{
CrosshairsOptions* ops = (CrosshairsOptions*)ops_;
if (!ops->hide)
off();
}
void Crosshairs::off()
{
if (Tk_IsMapped(graphPtr_->tkwin_) && (visible_)) {
XDrawSegments(graphPtr_->display_, Tk_WindowId(graphPtr_->tkwin_),
gc_, segArr_, 2);
visible_ = 0;
}
}
void Crosshairs::on()
{
CrosshairsOptions* ops = (CrosshairsOptions*)ops_;
if (Tk_IsMapped(graphPtr_->tkwin_) && (!visible_)) {
if (!PointInGraph(graphPtr_, ops->x, ops->y))
return;
XDrawSegments(graphPtr_->display_, Tk_WindowId(graphPtr_->tkwin_),
gc_, segArr_, 2);
visible_ = 1;
}
}
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