adjust tooltip position (mrovi)

[chaz/tint2] / src / util / area.c

/**************************************************************************
*
* Tint2 : area
*
* Copyright (C) 2008 thierry lorthiois (lorthiois@bbsoft.fr)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
**************************************************************************/

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/extensions/Xrender.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pango/pangocairo.h>

#include "area.h"
#include "server.h"
#include "panel.h"


/*
// TODO : layering & drawing loop
1) browse tree and calculate 'size' for SIZE_BY_CONTENT
        - SIZE_BY_CONTENT loop calculate child first
        - if 'size' changed then 'resize = 1' on the parent (tester resize aprés la boucle)
        - size == width on horizontal panel and == height on vertical panel
2) browse tree and calculate 'size' for SIZE_BY_LAYOUT
        - SIZE_BY_LAYOUT loop calculate parent first
        - if 'size' changed then 'resize = 1' on childs with SIZE_BY_LAYOUT
        - calculate width = size - somme(child_with_of_SIZE_BY_CONTENT) modulo(number of child_SIZE_BY_LAYOUT)
        - calculate modulo = 
3) calculate posx of all objects
4) redraw needed objects
*/

void refresh (Area *a)
{
        // don't draw and resize hide objects
        if (!a->on_screen) return;

        size(a);

        // don't draw transparent objects (without foreground and without background)
        if (a->redraw) {
                a->redraw = 0;
                // force redraw of child
                GSList *l;
                for (l = a->list ; l ; l = l->next)
                        set_redraw(l->data);

                //printf("draw area posx %d, width %d\n", a->posx, a->width);
                draw(a);
        }

        // draw current Area
        if (a->pix == 0) printf("empty area posx %d, width %d\n", a->posx, a->width);
        XCopyArea (server.dsp, a->pix, ((Panel *)a->panel)->temp_pmap, server.gc, 0, 0, a->width, a->height, a->posx, a->posy);

        // and then refresh child object
        GSList *l;
        for (l = a->list; l ; l = l->next)
                refresh(l->data);
}


void size (Area *a)
{
        GSList *l;

        if (a->resize) {
                a->resize = 0;
                // force the resize of childs
                for (l = a->list; l ; l = l->next) {
                        Area *area = (Area*)l->data;
                        area->resize = 1;
                        size(area);
                }

                // resize can generate a redraw
                if (a->_resize)
                        a->_resize(a);
        }
}


void set_redraw (Area *a)
{
        a->redraw = 1;

        GSList *l;
        for (l = a->list ; l ; l = l->next)
                set_redraw(l->data);
}


void draw (Area *a)
{
        if (a->pix) XFreePixmap (server.dsp, a->pix);
        a->pix = XCreatePixmap (server.dsp, server.root_win, a->width, a->height, server.depth);

        // add layer of root pixmap (or clear pixmap if real_transparency==true)
        if (server.real_transparency)
                clear_pixmap(a->pix, 0 ,0, a->width, a->height);
        XCopyArea (server.dsp, ((Panel *)a->panel)->temp_pmap, a->pix, server.gc, a->posx, a->posy, a->width, a->height, 0, 0);

        cairo_surface_t *cs;
        cairo_t *c;

        cs = cairo_xlib_surface_create (server.dsp, a->pix, server.visual, a->width, a->height);
        c = cairo_create (cs);

        draw_background (a, c);

        if (a->_draw_foreground)
                a->_draw_foreground(a, c);

        cairo_destroy (c);
        cairo_surface_destroy (cs);
}


void draw_background (Area *a, cairo_t *c)
{
        if (a->bg->back.alpha > 0.0) {
                //printf("    draw_background (%d %d) RGBA (%lf, %lf, %lf, %lf)\n", a->posx, a->posy, pix->back.color[0], pix->back.color[1], pix->back.color[2], pix->back.alpha);
                draw_rect(c, a->bg->border.width, a->bg->border.width, a->width-(2.0 * a->bg->border.width), a->height-(2.0*a->bg->border.width), a->bg->border.rounded - a->bg->border.width/1.571);
                cairo_set_source_rgba(c, a->bg->back.color[0], a->bg->back.color[1], a->bg->back.color[2], a->bg->back.alpha);
                cairo_fill(c);
        }

        if (a->bg->border.width > 0 && a->bg->border.alpha > 0.0) {
                cairo_set_line_width (c, a->bg->border.width);

                // draw border inside (x, y, width, height)
                draw_rect(c, a->bg->border.width/2.0, a->bg->border.width/2.0, a->width - a->bg->border.width, a->height - a->bg->border.width, a->bg->border.rounded);
                /*
                // convert : radian = degre * M_PI/180
                // définir le dégradé dans un carré de (0,0) (100,100)
                // ensuite ce dégradé est extrapolé selon le ratio width/height
                // dans repère (0, 0) (100, 100)
                double X0, Y0, X1, Y1, degre;
                // x = X * (a->width / 100), y = Y * (a->height / 100)
                double x0, y0, x1, y1;
                X0 = 0;
                Y0 = 100;
                X1 = 100;
                Y1 = 0;
                degre = 45;
                // et ensuite faire la changement d'unité du repère
                // car ce qui doit resté inchangée est les traits et pas la direction

                // il faut d'abord appliquer une rotation de 90° (et -180° si l'angle est supérieur à 180°)
                // ceci peut être appliqué une fois pour toute au départ
                // ensuite calculer l'angle dans le nouveau repère
                // puis faire une rotation de 90°
                x0 = X0 * ((double)a->width / 100);
                x1 = X1 * ((double)a->width / 100);
                y0 = Y0 * ((double)a->height / 100);
                y1 = Y1 * ((double)a->height / 100);

                x0 = X0 * ((double)a->height / 100);
                x1 = X1 * ((double)a->height / 100);
                y0 = Y0 * ((double)a->width / 100);
                y1 = Y1 * ((double)a->width / 100);

                cairo_pattern_t *linpat;
                linpat = cairo_pattern_create_linear (x0, y0, x1, y1);
                cairo_pattern_add_color_stop_rgba (linpat, 0, a->border.color[0], a->border.color[1], a->border.color[2], a->border.alpha);
                cairo_pattern_add_color_stop_rgba (linpat, 1, a->border.color[0], a->border.color[1], a->border.color[2], 0);
                cairo_set_source (c, linpat);
                */
                cairo_set_source_rgba (c, a->bg->border.color[0], a->bg->border.color[1], a->bg->border.color[2], a->bg->border.alpha);

                cairo_stroke (c);
                //cairo_pattern_destroy (linpat);
        }
}


void remove_area (Area *a)
{
        Area *parent = (Area*)a->parent;

        parent->list = g_slist_remove(parent->list, a);
        set_redraw (parent);

}


void add_area (Area *a)
{
        Area *parent = (Area*)a->parent;

        parent->list = g_slist_remove(parent->list, a);
        set_redraw (parent);

}


void free_area (Area *a)
{
        GSList *l0;
        for (l0 = a->list; l0 ; l0 = l0->next)
                free_area (l0->data);

        if (a->list) {
                g_slist_free(a->list);
                a->list = 0;
        }
        if (a->pix) {
                XFreePixmap (server.dsp, a->pix);
                a->pix = 0;
        }
}


void draw_rect(cairo_t *c, double x, double y, double w, double h, double r)
{
        if (r > 0.0) {
                double c1 = 0.55228475 * r;

                cairo_move_to(c, x+r, y);
                cairo_rel_line_to(c, w-2*r, 0);
                cairo_rel_curve_to(c, c1, 0.0, r, c1, r, r);
                cairo_rel_line_to(c, 0, h-2*r);
                cairo_rel_curve_to(c, 0.0, c1, c1-r, r, -r, r);
                cairo_rel_line_to (c, -w +2*r, 0);
                cairo_rel_curve_to (c, -c1, 0, -r, -c1, -r, -r);
                cairo_rel_line_to (c, 0, -h + 2 * r);
                cairo_rel_curve_to (c, 0, -c1, r - c1, -r, r, -r);
        }
        else
                cairo_rectangle(c, x, y, w, h);
}


void clear_pixmap(Pixmap p, int x, int y, int w, int h)
{
        Picture pict = XRenderCreatePicture(server.dsp, p, XRenderFindVisualFormat(server.dsp, server.visual), 0, 0);
        XRenderColor col = { .red=0, .green=0, .blue=0, .alpha=0 };
        XRenderFillRectangle(server.dsp, PictOpSrc, pict, &col, x, y, w, h);
        XRenderFreePicture(server.dsp, pict);
}