Android: Posting well behaved pie drawing method. Needs refactoring.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12787 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Matthias Melcher 2018-03-23 21:41:36 +00:00
parent b8a50851fd
commit 514782864e
2 changed files with 276 additions and 39 deletions

View File

@ -15,6 +15,79 @@
*
*/
#if 0
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Box.H>
#include <FL/Fl_Hor_Slider.H>
#include <FL/fl_draw.H>
class MyBox : public Fl_Box
{
public:
MyBox(int x, int y, int w, int h) :
Fl_Box(x, y, w, h)
{
box(FL_DOWN_BOX);
}
void draw()
{
Fl_Box::draw();
fl_color(FL_BLUE);
fl_pie(x()+20, y()+20, w()-40, h()-40, a1, a2);
}
double a1 = 0.0;
double a2 = 240.0;
};
Fl_Window *win;
MyBox *box = 0L;
char s1Label[80] = { 0 };
char s2Label[80] = { 0 };
int main(int argc, char **argv)
{
win = new Fl_Window(0, 0, 600, 800);
box = new MyBox(10, 10, 580, 580);
auto s1 = new Fl_Hor_Slider(210, 600, 380, 45, s1Label);
s1->range(-360, 360);
s1->value(0.0);
s1->labelsize(35);
s1->align(FL_ALIGN_LEFT);
s1->increment(1, 0);
s1->callback(
[](Fl_Widget *w, void*) {
auto s = (Fl_Slider*)w;
box->a1 = s->value();
sprintf(s1Label, "%g", s->value());
win->redraw();
}
);
auto s2 = new Fl_Hor_Slider(210, 660, 380, 45, s2Label);
s2->range(-360, 360);
s2->value(240.0);
s2->labelsize(35);
s2->align(FL_ALIGN_LEFT);
s2->callback(
[](Fl_Widget *w, void*) {
auto s = (Fl_Slider*)w;
box->a2 = s->value();
sprintf(s2Label, "%g", s->value());
win->redraw();
}
);
win->show(argc, argv);
Fl::run();
return 0;
}
#elif 1
#include <stdlib.h>
#include <stdio.h>
@ -182,8 +255,7 @@ int main(int argc, char ** argv) {
#if 0
#else
#include <src/drivers/Android/Fl_Android_Application.H>
#include <FL/Fl_Window.H>
@ -310,6 +382,8 @@ int xmain(int argc, char **argv)
* drawing call must scale at some point (line width!)
* rotating the screen must call the app handler and(?) window resize
* proportions: pixels should be square
Need Work:
- Fl_Android_Graphics_Driver::pie(int) needs refactoring
test/CubeMain.cxx test/line_style.cxx
test/CubeView.cxx test/list_visuals.cxx
@ -320,7 +394,7 @@ test/animated.cxx test/menubar.cxx
test/ask.cxx test/minimum.cxx
test/bitmap.cxx test/native-filechooser.cxx
test/blocks.cxx test/navigation.cxx
* test/boxtype.cxx : !! testing
* test/boxtype.cxx : !! 'boxtype': must fix diamond box, plastic up frame, see fourth column
test/offscreen.cxx
test/browser.cxx test/output.cxx
test/button.cxx test/overlay.cxx

View File

@ -623,54 +623,217 @@ void Fl_Android_Graphics_Driver::arc_unscaled(float xi, float yi, float w, float
*/
void Fl_Android_Graphics_Driver::pie_unscaled(float xi, float yi, float w, float h, double b1, double b2)
{
// Fl_Android_Application::log_e("------ PIE: %g %g (%g, %g)", b1, b2, b1-90, b2-90);
// Fl_Color c = fl_color();
// fl_color(FL_YELLOW);
if (b1>=b2) return;
double rx = w/2.0;
double ry = h/2.0;
// quick access to bounding box size
double rx = w / 2.0;
double ry = h / 2.0;
double x = xi + rx;
double y = yi + ry;
// double a1 = b1/180*M_PI;
// double a2 = b2/180*M_PI;
// double incr = (a2-a1)/20;
// for (int i=0; i<20; i++) {
// double dx = cos(a1), dy = -sin(a1);
// line_unscaled(x+rx*dx, y+ry*dy, x+2*rx*dx, y+2*ry*dy);
// a1 += incr;
// }
//
// fl_color(FL_RED);
double at1 = (b1-90)/180*M_PI; // radians, 0 is top, CCW
double at2 = (b2-90)/180*M_PI; // radians, 0 is top, CCW
if (at2<0) { at1+=2*M_PI; at2+=2*M_PI; }
if (at2>2*M_PI) { at1-=2*M_PI; at2-=2*M_PI; }
double a1 = b1 / 180 * M_PI;
double a2 = b2 / 180 * M_PI;
for (double iy=y-ry; iy<=y+ry; iy++) {
double a = acos((iy-y)/ry);
double aL = M_PI-a; // 0..PI
double aR = a+M_PI; // 2PI..PI
// Fl_Android_Application::log_e("%g %g (%g) - %g %g", aL, aR, aR-2*M_PI, at1, at2);
// invert to make b1 always the smaller value
if (b1 > b2) {
b1 -= 360.0;
}
if (b1 == b2) return;
if ( ((at1<0) && ((at1<=aL-2*M_PI) && (at2>aL-2*M_PI) || (at1<=aL) && (at2>aL)))
|| ((at1>=0) && (at1<=aL) && (at2>aL)))
xyline_unscaled(x-sin(aL)*rx, iy, x);
// make the top the zero degree origin, turning CCW
b1 -= 90.0;
b2 -= 90.0;
if ( ((at1<0) && ((at1<=aR-2*M_PI) && (at2>aR-2*M_PI) || (at1<=aR) && (at2>aR)))
|| ((at1>=0) && (at1<=aR) && (at2>aR)))
xyline_unscaled(x, iy, x-sin(aR)*rx);
// find the delta between angles
double delta = b2 - b1;
if (delta >= 360.0) {
b1 = 0.0;
b2 = 360.0;
delta = 360.0;
}
// make sure that b2 is always in the range [0.0..360.0]
if (b2 > 360.0) b2 -= 360.0; // FIXME: fmod(...)
if (b2 < 0.0) b2 += 360.0;
b1 = b2 - delta;
// now b1 is [-360...360] and b2 is [0..360] and b1<b2;
// fl_color(c);
a1 = b1 / 180 * M_PI;
a2 = b2 / 180 * M_PI;
double b1o = b1;
bool flipped = false;
if (a1<0.0) { a1 += 2*M_PI; b1 += 360.0; flipped = true; }
// Fl_Android_Application::log_e(" %g %g %d", b1, b2, flipped);
double a1Slope = tan(a1);
double a2Slope = tan(a2);
// draw the pie line by line
for (double iy = y - ry; iy <= y + ry; iy++) {
double a = acos((iy - y) / ry);
double aL = M_PI - a; // 0..PI
double aR = a + M_PI; // 2PI..PI
double sinALrx = sin(aL)*rx;
// fl_color(FL_RED);
if (aL<0.5*M_PI) {
// rasterize top left quadrant
bool loInside = false, hiInside = false;
double loLeft = 0.0, loRight = 0.0;
double hiLeft = 0.0, hiRight = 0.0;
if (b1 >= 0 && b1 < 90) {
loInside = true;
loLeft = -sinALrx;
loRight = a1Slope * (iy - y);
}
if (b2 >= 0 && b2 < 90) {
hiInside = true;
if (aL < a2)
hiLeft = -sinALrx;
else
hiLeft = a2Slope * (iy - y);
}
if (loInside && hiInside && !flipped) {
// fl_color(FL_GREEN);
if (a1 < aL)
xyline_unscaled(x + hiLeft, iy, x + loRight);
} else {
if ((!loInside) && (!hiInside)) {
// fl_color(FL_MAGENTA);
if ( (b1o<=0.0 && b2>=90.0) || (b1o<=(0.0-360.0) && b2>=(90.0-360.0)) )
xyline_unscaled(x - sinALrx, iy, x);
} else {
if (loInside) {
// fl_color(FL_BLUE);
if (a1 < aL)
xyline_unscaled(x + loLeft, iy, x + loRight);
}
if (hiInside) {
// fl_color(FL_YELLOW);
xyline_unscaled(x + hiLeft, iy, x);
}
}
}
} else {
// rasterize bottom left quadrant
bool loInside = false, hiInside = false;
double loLeft = 0.0, loRight = 0.0;
double hiLeft = 0.0, hiRight = 0.0;
if (b1 >= 90 && b1 < 180) {
loInside = true;
if (aL>=a1)
loLeft = -sinALrx;
else
loLeft = a1Slope * (iy - y);
}
if (b2 >= 90 && b2 < 180) {
hiInside = true;
hiLeft = -sinALrx;
hiRight = a2Slope * (iy - y);
}
if (loInside && hiInside && !flipped) {
// fl_color(FL_GREEN);
if (a2 > aL)
xyline_unscaled(x + loLeft, iy, x + hiRight);
} else {
if ((!loInside) && (!hiInside)) {
// fl_color(FL_MAGENTA);
if ( (b1o<=90.0 && b2>=180.0) || (b1o<=(90.0-360.0) && b2>=(180.0-360.0)) )
xyline_unscaled(x - sinALrx, iy, x);
} else {
if (loInside) {
// fl_color(FL_BLUE);
xyline_unscaled(x + loLeft, iy, x);
}
if (hiInside) {
// fl_color(FL_YELLOW);
if (a2 > aL)
xyline_unscaled(x + hiLeft, iy, x + hiRight);
}
}
}
}
if (aR<1.5*M_PI) {
// rasterize bottom right quadrant
bool loInside = false, hiInside = false;
double loLeft = 0.0, loRight = 0.0;
double hiLeft = 0.0, hiRight = 0.0;
if (b1 >= 180 && b1 < 270) {
loInside = true;
loLeft = sinALrx;
loRight = a1Slope * (iy - y);
}
if (b2 >= 180 && b2 < 270) {
hiInside = true;
if (aR < a2)
hiLeft = sinALrx;
else
hiLeft = a2Slope * (iy - y);
}
if (loInside && hiInside && !flipped) {
// fl_color(FL_GREEN);
if (a1 < aR)
xyline_unscaled(x + hiLeft, iy, x + loRight);
} else {
if ((!loInside) && (!hiInside)) {
// fl_color(FL_MAGENTA);
if ( (b1o<=180.0 && b2>=270.0) || (b1o<=(180.0-360.0) && b2>=(270.0-360.0)) )
xyline_unscaled(x + sinALrx, iy, x);
} else {
if (loInside) {
// fl_color(FL_BLUE);
if (a1 < aR)
xyline_unscaled(x + loLeft, iy, x + loRight);
}
if (hiInside) {
// fl_color(FL_YELLOW);
xyline_unscaled(x + hiLeft, iy, x);
}
}
}
} else {
// rasterize top right quadrant
bool loInside = false, hiInside = false;
double loLeft = 0.0, loRight = 0.0;
double hiLeft = 0.0, hiRight = 0.0;
if (b1 >= 270 && b1 < 360) {
loInside = true;
if (aR>=a1)
loLeft = sinALrx;
else
loLeft = a1Slope * (iy - y);
}
if (b2 >= 270 && b2 < 360) {
hiInside = true;
hiLeft = sinALrx;
hiRight = a2Slope * (iy - y);
}
if (loInside && hiInside && !flipped) {
// fl_color(FL_GREEN);
if (a2 > aR)
xyline_unscaled(x + loLeft, iy, x + hiRight);
} else {
if ((!loInside) && (!hiInside)) {
// fl_color(FL_MAGENTA);
if ( (b1o<=270.0 && b2>=360.0) || (b1o<=(270.0-360.0) && b2>=(360.0-360.0)) )
xyline_unscaled(x + sinALrx, iy, x);
} else {
if (loInside) {
// fl_color(FL_BLUE);
xyline_unscaled(x + loLeft, iy, x);
}
if (hiInside) {
// fl_color(FL_YELLOW);
if (a2 > aR)
xyline_unscaled(x + hiLeft, iy, x + hiRight);
}
}
}
}
}
}
#if 0
// Code used to switch output to an off-screen window. See macros in