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multibar.c
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/*
*
* postfish
*
* Copyright (C) 2002-2005 Monty
*
* Postfish is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* Postfish is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Postfish; see the file COPYING. If not, write to the
* Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
*/
// Opt out of struct sealing for now, fixing all cases
// here requires more work
#undef GSEAL_ENABLE
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <gdk/gdkkeysyms.h>
#include "multibar.h"
static GdkBitmap *stipple=NULL;
static GdkBitmap *stippleB=NULL;
static float compute_dampening(float width, float target,float current,float delta,int zerodamp){
float raw_delta=target-current;
float testdelta=delta+(raw_delta*.2);
if(target<0 && !zerodamp){
if(current>0)
raw_delta=target-current;
}else if(current<0 && !zerodamp){
raw_delta=target-current;
}else if(raw_delta<0){
if(delta>0){
raw_delta=0.;
}else{
if(raw_delta<testdelta)raw_delta=testdelta;
}
}else{
if(delta<0){
raw_delta=0.;
}else{
if(raw_delta>testdelta)raw_delta=testdelta;
}
}
return raw_delta;
}
/* call me roughly 10-20fps */
static void compute(Multibar *m,float *lowvals, float *highvals, int n, int draw){
int i,j,xpad;
GtkWidget *widget=GTK_WIDGET(m);
float max=-400;
int height=widget->allocation.height;
int width=widget->allocation.width;
/* figure out the x padding */
if(m->thumbs<1){
xpad=1;
}else{
xpad=height;
}
m->xpad=xpad;
if(m->readout){
if(n>m->bars){
if(!m->bartrackers)
m->bartrackers=calloc(n,sizeof(*m->bartrackers));
else{
m->bartrackers=realloc(m->bartrackers,
n*sizeof(*m->bartrackers));
memset(m->bartrackers+m->bars,0,
sizeof(*m->bartrackers)*(n-m->bars));
}
for(i=m->bars;i<n;i++){
m->bartrackers[i].pixelposlo=-400;
m->bartrackers[i].pixelposhi=-400;
m->bartrackers[i].pixeldeltalo=0;
m->bartrackers[i].pixeldeltahi=0;
}
m->bars=n;
}else if(n<m->bars)
m->bars=n;
for(i=0;i<n;i++)
if(highvals[i]>max)max=highvals[i];
if(m->clipdelay>0)
m->clipdelay--;
else
m->clipdelay=0;
if(m->peakdelay>0)
m->peakdelay--;
else{
m->peakdelay=0;
m->peakdelta--;
m->peak+=m->peakdelta;
}
if(max>m->peak){
m->peak=max;
m->peakdelay=15*2; /* ~2 second hold */
m->peakdelta=0;
}
if(draw){
int *pixhi=alloca(n*sizeof(*pixhi));
int *pixlo=alloca(n*sizeof(*pixlo));
for(i=0;i<n;i++){
pixlo[i]=-1;
for(j=0;j<=m->labels;j++)
if(lowvals[i]>=m->levels[j]){
if(lowvals[i]<=m->levels[j+1]){
float del=(lowvals[i]-m->levels[j])/(m->levels[j+1]-m->levels[j]);
pixlo[i]=(j+del)/m->labels*(widget->allocation.width-xpad*2-1)+xpad;
break;
}else if(j==m->labels){
pixlo[i]=widget->allocation.width-xpad+1;
}
}else
break;
pixhi[i]=pixlo[i];
for(;j<=m->labels;j++)
if(highvals[i]>=m->levels[j]){
if(highvals[i]<=m->levels[j+1]){
float del=(highvals[i]-m->levels[j])/(m->levels[j+1]-m->levels[j]);
pixhi[i]=(j+del)/m->labels*(widget->allocation.width-xpad*2-1)+xpad;
break;
}else if(j==m->labels){
pixhi[i]=widget->allocation.width-xpad+1;
}
}else
break;
}
/* dampen movement according to setup */
for(i=0;i<n;i++){
float trackhi=m->bartrackers[i].pixelposhi;
float tracklo=m->bartrackers[i].pixelposlo;
float delhi=m->bartrackers[i].pixeldeltahi;
float dello=m->bartrackers[i].pixeldeltalo;
/* hi */
delhi = compute_dampening(width-xpad*2-1,pixhi[i],trackhi,delhi,m->dampen_flags & ZERO_DAMP);
if(pixhi[i]>trackhi){
if(m->dampen_flags & HI_ATTACK)pixhi[i]=trackhi+delhi;
}else{
if(m->dampen_flags & HI_DECAY)pixhi[i]=trackhi+delhi;
}
m->bartrackers[i].pixelposhi=pixhi[i];
m->bartrackers[i].pixeldeltahi=delhi;
/* lo */
dello = compute_dampening(width-xpad*2-1,pixlo[i],tracklo,dello,m->dampen_flags & ZERO_DAMP);
if(pixlo[i]>tracklo){
if(m->dampen_flags & LO_ATTACK)pixlo[i]=tracklo+dello;
}else{
if(m->dampen_flags & LO_DECAY)pixlo[i]=tracklo+dello;
}
m->bartrackers[i].pixelposlo=pixlo[i];
m->bartrackers[i].pixeldeltalo=dello;
}
}
}
}
static void draw(GtkWidget *widget,int n){
int i,j,x=-1;
Multibar *m=MULTIBAR(widget);
int xpad=m->xpad,upad=2,lpad=2;
int height=widget->allocation.height;
GtkWidget *parent=gtk_widget_get_parent(widget);
if(m->thumbs>0){
int leftover=height-widget->requisition.height+3;
if(leftover<height/4)
lpad+=leftover;
else
lpad+=height/4;
}
if(!m->boxcolor){
m->boxcolor=gdk_gc_new(m->backing);
gdk_gc_copy(m->boxcolor,widget->style->black_gc);
}
if(m->readout && widget->state!=GTK_STATE_INSENSITIVE){
/* draw the pixel positions */
while(x<widget->allocation.width){
int r=0xffff,g=0xffff,b=0xffff;
GdkColor rgb={0,0,0,0};
int next=widget->allocation.width;
for(i=0;i<n;i++){
if(m->bartrackers[i].pixelposlo>x && m->bartrackers[i].pixelposlo<next)
next=m->bartrackers[i].pixelposlo;
if(m->bartrackers[i].pixelposhi>x && m->bartrackers[i].pixelposhi<next)
next=m->bartrackers[i].pixelposhi;
}
for(i=0;i<n;i++){
if(m->bartrackers[i].pixelposlo<=x && m->bartrackers[i].pixelposhi>=next){
switch(i%8){
case 0:
r*=.65;
g*=.65;
b*=.65;
break;
case 1:
r*=1.;
g*=.5;
b*=.5;
break;
case 2:
r*=.6;
g*=.6;
b*=1.;
break;
case 3:
r*=.4;
g*=.9;
b*=.4;
break;
case 4:
r*=.7;
g*=.6;
b*=.3;
break;
case 5:
r*=.7;
g*=.4;
b*=.8;
break;
case 6:
r*=.3;
g*=.7;
b*=.7;
break;
case 7:
r*=.4;
g*=.4;
b*=.4;
break;
}
}
}
rgb.red=r;
rgb.green=g;
rgb.blue=b;
gdk_gc_set_rgb_fg_color(m->boxcolor,&rgb);
gdk_draw_rectangle(m->backing,m->boxcolor,1,x+1,upad+1,next-x,widget->allocation.height-lpad-upad-3);
x=next;
}
gdk_draw_line (m->backing,
widget->style->white_gc,
xpad, widget->allocation.height-lpad-1,
widget->allocation.width-1-xpad,
widget->allocation.height-lpad-1);
if(m->clipdelay){
gdk_draw_line (m->backing,
widget->style->fg_gc[1],
xpad, upad, widget->allocation.width-1-xpad, upad);
gdk_draw_line (m->backing,
widget->style->fg_gc[1],
xpad, widget->allocation.height-lpad-2,
widget->allocation.width-1-xpad,
widget->allocation.height-lpad-2);
}else{
gdk_draw_line (m->backing,
widget->style->white_gc,
xpad, upad, widget->allocation.width-1-xpad, upad);
gdk_draw_line (m->backing,
widget->style->white_gc,
xpad, widget->allocation.height-lpad-2,
widget->allocation.width-1-xpad,
widget->allocation.height-lpad-2);
}
/* peak follower */
if(m->dampen_flags & PEAK_FOLLOW){
int x=-10;
for(j=0;j<=m->labels+1;j++)
if(m->peak>=m->levels[j]){
if(m->peak<=m->levels[j+1]){
float del=(m->peak-m->levels[j])/(m->levels[j+1]-m->levels[j]);
x=(j+del)/m->labels*(widget->allocation.width-xpad*2-1)+xpad;
break;
}else if (j==m->labels){
x=widget->allocation.width-xpad+1;
}
}else
break;
for(j=0;j<n;j++)
if(x<m->bartrackers[j].pixelposhi)
x=m->bartrackers[j].pixelposhi;
{
int y=widget->allocation.height-lpad-1;
gdk_draw_line(m->backing,widget->style->fg_gc[0],
x-3,upad,x+3,upad);
gdk_draw_line(m->backing,widget->style->fg_gc[0],
x-2,upad+1,x+2,upad+1);
gdk_draw_line(m->backing,widget->style->fg_gc[0],
x-1,upad+2,x+1,upad+2);
gdk_draw_line(m->backing,widget->style->fg_gc[0],
x-3,y-1,x+3,y-1);
gdk_draw_line(m->backing,widget->style->fg_gc[0],
x-2,y-2,x+2,y-2);
gdk_draw_line(m->backing,widget->style->fg_gc[0],
x-1,y-3,x+1,y-3);
gdk_draw_line(m->backing,widget->style->fg_gc[1],
x,upad+1,x,y-2);
}
}
}else{
int width=widget->allocation.width-xpad;
int height=widget->allocation.height;
GdkGC *gc=parent->style->bg_gc[0];
/* blank scale to bg of parent */
gdk_draw_rectangle(m->backing,gc,1,xpad,0,width-xpad+1,height-lpad);
}
for(i=0;i<=m->labels;i++){
int x=rint(((float)i)/m->labels*(widget->allocation.width-xpad*2-1))+xpad;
int y=widget->allocation.height-lpad-upad;
int px,py;
int gc=0;
if(m->levels[i]>0.)gc=1;
if(m->readout)
gdk_draw_line (m->backing,
widget->style->text_gc[gc],
x, upad, x, y+upad);
else
gdk_draw_line (m->backing,
widget->style->text_gc[gc],
x, y/4+upad, x, y+upad);
pango_layout_get_pixel_size(m->layout[i],&px,&py);
if(i==0){
x+=2;
y-=py;
y/=2;
}else{
x-=px+2;
y-=py;
y/=2;
}
gdk_draw_layout (m->backing,
widget->style->text_gc[gc],
x, y+upad,
m->layout[i]);
}
/* draw frame */
{
int width=widget->allocation.width;
int height=widget->allocation.height;
GdkGC *gc=parent->style->bg_gc[0];
GdkGC *light_gc=parent->style->light_gc[0];
GdkGC *dark_gc=parent->style->dark_gc[0];
GdkGC *mid_gc=widget->style->bg_gc[GTK_STATE_ACTIVE];
/* blank side padding to bg of parent */
gdk_draw_rectangle(m->backing,gc,1,0,0,xpad,height);
gdk_draw_rectangle(m->backing,gc,1,width-xpad,0,xpad,height);
/* blank sides of trough */
gdk_draw_rectangle(m->backing,gc,1,
0,
height-lpad,
m->thumblo_x,
lpad);
gdk_draw_rectangle(m->backing,gc,1,
m->thumbhi_x+xpad+xpad,
height-lpad,
width-xpad-xpad-m->thumbhi_x,
lpad);
/* frame */
if(m->readout){
gdk_draw_line(m->backing,dark_gc,0,0,width-2,0);
gdk_draw_line(m->backing,dark_gc,0,0,0,height-lpad);
gdk_draw_line(m->backing,dark_gc,1,height-lpad,width-2,height-lpad);
gdk_draw_line(m->backing,dark_gc,width-2,height-lpad,width-2,1);
gdk_draw_line(m->backing,light_gc,0,height-lpad+1,
width-1,height-lpad+1);
gdk_draw_line(m->backing,light_gc,width-1,0,width-1,height-lpad+1);
gdk_draw_line(m->backing,light_gc,1,1,width-3,1);
gdk_draw_line(m->backing,light_gc,1,1,1,height-lpad-1);
}
/* dark trough */
if(lpad>2 || m->readout==0){
if(lpad>2){
gdk_draw_rectangle(m->backing,mid_gc,1,
m->thumblo_x+1,height-lpad+1,
m->thumbhi_x-m->thumblo_x+xpad*2,lpad-1);
gdk_draw_line(m->backing,dark_gc,
m->thumblo_x,height-lpad,
m->thumblo_x,height-1);
}
gdk_draw_line(m->backing,light_gc,
m->thumblo_x,height-1,
m->thumbhi_x+xpad*2,height-1);
dark_gc=widget->style->dark_gc[GTK_STATE_ACTIVE];
gdk_draw_line(m->backing,dark_gc,
m->thumblo_x,height-lpad,
m->thumbhi_x+xpad*2-1,height-lpad);
if(lpad>2)
gdk_draw_line(m->backing,light_gc,
m->thumbhi_x+xpad*2,height-1,
m->thumbhi_x+xpad*2,height-lpad+1);
if(m->readout==0)
gdk_draw_point(m->backing,light_gc,width-1,height-lpad);
}
}
/* draw slider thumbs */
if(m->thumbs){
int height=widget->allocation.height,i,j;
GdkGC *black_gc=widget->style->black_gc;
int y0=height/3-1;
int y1=height-3;
int outer=height-1;
int inner=(y1+y0)/2-y0;
int A[3]={outer,outer,outer};
int B[3]={inner,inner,inner};
int C[3]={inner,inner,inner};
int D[3]={outer,outer,outer};
GdkColor yellow={0,0xff00,0xd000,0};
if(m->thumbs==2){
/* adjustment required for overlapping thumbs? */
int mid=m->thumbpixel[1]-m->thumbpixel[0]-1;
int midA=(mid<0?0:mid)/2;
int midB=(mid<0?0:mid)-midA;
if(midA<D[0])D[0]=midA;
if(midA<C[0])C[0]=midA;
if(midB<A[1])A[1]=midB;
if(midB<B[1])B[1]=midB;
}
if(m->thumbs==3){
/* adjust for 0,1 overlap if any; different from the 2 case */
int mid=m->thumbpixel[1]-m->thumbpixel[0]-1;
int midA=(mid<0?0:mid)/2;
int midB=(mid<0?0:mid)-midA;
if(midA<D[0])D[0]=midA;
if(D[0]<C[0]+2)D[0]=C[0]+2;
if(midB<A[1])A[1]=midB;
if(A[1]<B[1]+2)A[1]=B[1]+2;
/* adjust for 1,2 overlap if any */
mid=m->thumbpixel[2]-m->thumbpixel[1]-1;
midA=(mid<0?0:mid)/2;
midB=(mid<0?0:mid)-midA;
if(midA<D[1])D[1]=midA;
if(D[1]<C[1]+2)D[1]=C[1]+2;
if(midB<A[2])A[2]=midB;
if(A[2]<B[2]+2)A[2]=B[2]+2;
}
for(i=0;i<m->thumbs;i++){
if(m->thumbs==3){
/* in the three-thumb case, the middle thumb is drawn last */
switch(i){
case 0:
j=0;
break;
case 1:
j=2;
break;
case 2:
j=1;
break;
}
}else
j=i;
{
int x=m->thumbpixel[j]+xpad;
GdkPoint p[8]={ {x+D[j],y0+C[j]},
{x+C[j],y0+C[j]},
{x ,y0 },
{x-B[j],y0+B[j]},
{x-A[j],y0+B[j]},
{x-A[j],y1+1 },
{x+D[j],y1+1 },
{x+D[j],y0+C[j]}};
GdkPoint d[3]={ {x-A[j]+1,y1},
{x+D[j]-1,y1},
{x+D[j]-1,y0+C[j]+1}};
GdkGC *gc=widget->style->bg_gc[m->thumbstate[j]];
GdkGC *light_gc=widget->style->light_gc[m->thumbstate[j]];
GdkGC *dark_gc=widget->style->dark_gc[m->thumbstate[j]];
gdk_draw_polygon(m->backing,gc,TRUE,p,7);
gdk_draw_lines(m->backing,dark_gc,d,3);
if(m->thumbfocus==j && m->widgetfocus){
if(x&1)
gdk_gc_set_stipple(black_gc,stipple);
else
gdk_gc_set_stipple(black_gc,stippleB);
gdk_gc_set_fill(black_gc,GDK_STIPPLED);
gdk_draw_polygon(m->backing,black_gc,TRUE,p,7);
gdk_gc_set_fill(black_gc,GDK_SOLID);
}
gdk_draw_lines(m->backing,light_gc,p,6);
gdk_draw_lines(m->backing,black_gc,p+5,3);
gdk_gc_set_rgb_fg_color(m->boxcolor,&yellow);
gdk_draw_line(m->backing,m->boxcolor,x,y1-1,x,0);
}
}
}
}
static void draw_and_expose(GtkWidget *widget){
Multibar *m=MULTIBAR(widget);
if(!GDK_IS_DRAWABLE(m->backing))return;
draw(widget,m->bars);
if(!gtk_widget_is_drawable(widget))return;
if(!GDK_IS_DRAWABLE(widget->window))return;
gdk_draw_drawable(widget->window,
widget->style->fg_gc[gtk_widget_get_state(widget)],
m->backing,
0, 0,
0, 0,
widget->allocation.width,
widget->allocation.height);
}
static gboolean expose( GtkWidget *widget, GdkEventExpose *event ){
Multibar *m=MULTIBAR(widget);
gdk_draw_drawable(widget->window,
widget->style->fg_gc[gtk_widget_get_state(widget)],
m->backing,
event->area.x, event->area.y,
event->area.x, event->area.y,
event->area.width, event->area.height);
return FALSE;
}
static void size_request (GtkWidget *widget,GtkRequisition *requisition){
int i,maxx=0,maxy=0,x,y,xpad;
Multibar *m=MULTIBAR(widget);
for(i=0;i<=m->labels;i++){
pango_layout_get_pixel_size(m->layout[i],&x,&y);
if(x>maxx)maxx=x;
if(y>maxy)maxy=y;
}
maxy+=4;
if(m->thumbs==0){
xpad=1;
}else{
maxy+=3;
xpad=maxy;
}
requisition->width = (maxx*1.5+2)*m->labels+xpad*2;
requisition->height = maxy;
}
static int transition_thumbfocus=0;
static gboolean multibar_focus (GtkWidget *widget,
GtkDirectionType direction){
Multibar *m=MULTIBAR(widget);
int ret=TRUE;
if(m->thumbs==0)return FALSE;
if(!m->widgetfocus)m->thumbfocus=-1;
switch(direction){
case GTK_DIR_TAB_FORWARD:
case GTK_DIR_RIGHT:
if(m->thumbfocus+1>=m->thumbs){
m->thumbfocus=-1;
ret=FALSE;
}else
m->thumbfocus++;
break;
case GTK_DIR_TAB_BACKWARD:
case GTK_DIR_LEFT:
if(m->thumbfocus==-1)
m->thumbfocus=m->thumbs-1;
else{
if(m->thumbfocus-1<0){
m->thumbfocus=-1;
ret=FALSE;
}else
m->thumbfocus--;
}
break;
case GTK_DIR_UP:
case GTK_DIR_DOWN:
if(m->thumbfocus==-1){
if(transition_thumbfocus>=0 && transition_thumbfocus<m->thumbs)
m->thumbfocus=transition_thumbfocus;
else
m->thumbfocus=0;
ret=TRUE;
}else{
transition_thumbfocus=m->thumbfocus;
m->thumbfocus=-1;
ret=FALSE;
}
break;
default:
m->thumbfocus=-1;
ret=FALSE;
}
if(ret==TRUE) gtk_widget_grab_focus(widget);
draw_and_expose(widget);
return ret;
}
static gint determine_thumb(Multibar *m,int ix, int iy){
GtkWidget *widget=GTK_WIDGET(m);
int max=widget->allocation.height;
float distances[3]={-1,-1,-1};
int thumb=-1;
/* center thumb */
if(m->thumbs==1 || m->thumbs>2){
int num=(m->thumbs==1?0:1);
int x= m->thumbpixel[num]-ix;
distances[num]=fabs(x);
}
/* left thumb */
if(m->thumbs>1){
int x= m->thumbpixel[0]-ix;
distances[0]=fabs(x-.1);
}
/* right thumb */
if(m->thumbs>1){
int num=(m->thumbs==2?1:2);
int x= m->thumbpixel[num]-ix;
distances[num]=fabs(x+.1);
}
if(m->thumbs && distances[0]<max)thumb=0;
if(m->thumbs>1 && distances[1]<max)
if(thumb == -1 || distances[1]<distances[0])thumb=1;
if(m->thumbs>2 && distances[2]<max)
if(thumb == -1 || (distances[2]<distances[0] &&
distances[2]<distances[1]))thumb=2;
if(m->thumbs>2 && distances[1]<max/2)thumb=1;
return thumb;
}
static int pixel_bound(Multibar *m,int x){
GtkWidget *w=GTK_WIDGET(m);
if(x<0)return 0;
if(x>w->allocation.width-m->xpad*2-1)
return w->allocation.width-m->xpad*2-1;
return x;
}
static float pixel_to_val(Multibar *m,int x){
GtkWidget *w=GTK_WIDGET(m);
int j;
for(j=0;j<=m->labels;j++){
int pixlo=rint((float)j/m->labels*(w->allocation.width-m->xpad*2-1));
int pixhi=rint((float)(j+1)/m->labels*(w->allocation.width-m->xpad*2-1));
if(x>=pixlo && x<=pixhi){
if(pixlo==pixhi)return m->levels[j];
float del=(float)(x-pixlo)/(pixhi-pixlo);
return (1.-del)*m->levels[j] + del*m->levels[j+1];
}
}
return 0.;
}
static int val_to_pixel(Multibar *m,float v){
GtkWidget *w=GTK_WIDGET(m);
int j,ret=0;
if(v<m->levels[0]){
ret=0;
}else if(v>m->levels[m->labels]){
ret=w->allocation.width-m->xpad*2-1;
}else{
for(j=0;j<=m->labels;j++){
if(v>=m->levels[j] && v<=m->levels[j+1]){
float del=(v-m->levels[j])/(m->levels[j+1]-m->levels[j]);
int pixlo=rint((float)j/m->labels*(w->allocation.width-m->xpad*2-1));
int pixhi=rint((float)(j+1)/m->labels*(w->allocation.width-m->xpad*2-1));
ret=rint(pixlo*(1.-del)+pixhi*del);
break;
}
}
}
ret=pixel_bound(m,ret);
return ret;
}
static gboolean configure(GtkWidget *widget, GdkEventConfigure *event){
Multibar *m=MULTIBAR(widget);
int i;
if (m->backing)
g_object_unref(m->backing);
m->backing = gdk_pixmap_new(widget->window,
widget->allocation.width,
widget->allocation.height,
-1);
gdk_draw_rectangle(m->backing,widget->style->white_gc,1,0,0,widget->allocation.width,
widget->allocation.height);
compute(m,0,0,0,1);
for(i=0;i<m->thumbs;i++)
m->thumbpixel[i]=val_to_pixel(m,m->thumbval[i]);
m->thumblo_x=val_to_pixel(m,m->thumblo);
m->thumbhi_x=val_to_pixel(m,m->thumbhi);
draw_and_expose(widget);
return TRUE;
}
static void partial_vals_bound(Multibar *m){
int i;
if(m->thumbsmall>0 && m->thumblarge>0)
for(i=0;i<m->thumbs;i++)
m->thumbval[i]=rint(m->thumbval[i]/m->thumbsmall)*m->thumbsmall;
for(i=0;i<m->thumbs;i++){
if(m->thumbval[i]<m->thumblo)m->thumbval[i]=m->thumblo;
if(m->thumbval[i]>m->thumbhi)m->thumbval[i]=m->thumbhi;
m->thumbpixel[i]=val_to_pixel(m,m->thumbval[i]);
}
}
static void vals_bound(Multibar *m){
partial_vals_bound(m);
if(m->thumbfocus>=0){
float v=m->thumbval[m->thumbfocus];
int x=m->thumbpixel[m->thumbfocus];
if(m->thumbfocus==2){
if(m->thumbpixel[1]>x){
m->thumbpixel[1]=x;
m->thumbval[1]=v;
}
if(m->thumbpixel[0]>x){
m->thumbpixel[0]=x;
m->thumbval[0]=v;
}
}
if(m->thumbfocus==1){
if(m->thumbpixel[2]<x){
m->thumbpixel[2]=x;
m->thumbval[2]=v;
}
if(m->thumbpixel[0]>x){
m->thumbpixel[0]=x;
m->thumbval[0]=v;
}
}
if(m->thumbfocus==0){
if(m->thumbpixel[2]<x){
m->thumbpixel[2]=x;
m->thumbval[2]=v;
}
if(m->thumbpixel[1]<x){
m->thumbpixel[1]=x;
m->thumbval[1]=v;
}
}
}
}
static gint lightme(GtkWidget *w,gint x,gint y){
Multibar *m=MULTIBAR(w);
int thumb=determine_thumb(m,x,y);
GtkStateType thumbstate[3];
thumbstate[0]=GTK_STATE_NORMAL;
thumbstate[1]=GTK_STATE_NORMAL;
thumbstate[2]=GTK_STATE_NORMAL;
if(thumb>=0)thumbstate[thumb]=GTK_STATE_PRELIGHT;
if(thumbstate[0]!=m->thumbstate[0] ||
thumbstate[1]!=m->thumbstate[1] ||
thumbstate[2]!=m->thumbstate[2]){
m->thumbstate[0]=thumbstate[0];
m->thumbstate[1]=thumbstate[1];
m->thumbstate[2]=thumbstate[2];
draw_and_expose(w);
}
return TRUE;
}
static gint multibar_motion(GtkWidget *w,
GdkEventMotion *event){
Multibar *m=MULTIBAR(w);
/* is a thumb already grabbed? */
if(m->thumbgrab>=0){
int x=event->x+m->thumbx;
float v;
x=pixel_bound(m,x);
m->thumbval[m->thumbgrab]=pixel_to_val(m,x);
vals_bound(m);
v=m->thumbval[m->thumbgrab];
x=m->thumbpixel[m->thumbgrab]=val_to_pixel(m,v);
if(m->callback)m->callback(GTK_WIDGET(m),m->callbackp);
draw_and_expose(w);
}else{
/* nothing grabbed right now; determine if we're in a a thumb's area */
lightme(w,event->x-m->xpad,event->y);
}
return TRUE;
}
static gint multibar_enter(GtkWidget *w,
GdkEventCrossing *event){
Multibar *m=MULTIBAR(w);
lightme(w,event->x-m->xpad,event->y);
return TRUE;
}
static gint multibar_leave(GtkWidget *widget,
GdkEventCrossing *event){
Multibar *m=MULTIBAR(widget);
if(m->thumbgrab<0){
if(m->thumbstate[0] ||
m->thumbstate[1] ||
m->thumbstate[2]){
m->thumbstate[0]=0;
m->thumbstate[1]=0;
m->thumbstate[2]=0;
draw_and_expose(widget);
}
}
return TRUE;
}
static gboolean button_press (GtkWidget *widget,
GdkEventButton *event){
Multibar *m=MULTIBAR(widget);
int thumb=determine_thumb(m,event->x-m->xpad,event->y);
if(thumb==0){
gtk_widget_grab_focus(widget);
m->thumbgrab=m->thumbfocus=0;
m->thumbx=m->thumbpixel[0]-event->x;
}else if(thumb==1){
gtk_widget_grab_focus(widget);
m->thumbgrab=m->thumbfocus=1;
m->thumbx=m->thumbpixel[1]-event->x;
}else if(thumb==2){
gtk_widget_grab_focus(widget);
m->thumbgrab=m->thumbfocus=2;
m->thumbx=m->thumbpixel[2]-event->x;
}
draw_and_expose(widget);
return TRUE;
}
static gboolean button_release (GtkWidget *widget,
GdkEventButton *event){
Multibar *m=MULTIBAR(widget);
m->thumbgrab=-1;
draw_and_expose(widget);
return TRUE;
}
static gboolean unfocus(GtkWidget *widget,
GdkEventFocus *event){
Multibar *m=MULTIBAR(widget);
m->widgetfocus=0;
draw_and_expose(widget);
return TRUE;
}
static gboolean refocus(GtkWidget *widget,
GdkEventFocus *event){
Multibar *m=MULTIBAR(widget);
m->widgetfocus=1;
draw_and_expose(widget);
return TRUE;
}
gboolean key_press(GtkWidget *w,GdkEventKey *event){
Multibar *m=MULTIBAR(w);
int x;
if(event->state&GDK_MOD1_MASK) return FALSE;
if(event->state&GDK_CONTROL_MASK) return FALSE;
if(m->thumbfocus>=0){
if(m->thumbsmall>0 && m->thumblarge>0){
switch(event->keyval){
case GDK_minus:
m->thumbval[m->thumbfocus]-=m->thumbsmall;
break;
case GDK_underscore:
m->thumbval[m->thumbfocus]-=m->thumblarge;
break;
case GDK_equal:
m->thumbval[m->thumbfocus]+=m->thumbsmall;
break;
case GDK_plus:
m->thumbval[m->thumbfocus]+=m->thumblarge;
break;
default:
return FALSE;
}