bcmeter.C

Go to the documentation of this file.

#include "bcbutton.h"
#include "bcmeter.h"
#include "bcpixmap.h"
#include "bcresources.h"
#include "bcwindow.h"
#include "colors.h"
#include "fonts.h"
#include "vframe.h"
#include <string.h>

// Which source image to replicate
#define METER_NORMAL 0
#define METER_GREEN 1
#define METER_RED 2
#define METER_YELLOW 3
#define METER_WHITE 4
#define METER_OVER 5

// Region of source image to replicate
#define METER_LEFT 0
#define METER_MID 1
#define METER_RIGHT 3


BC_Meter::BC_Meter(int x, 
        int y, 
        int orientation, 
        int pixels, 
        int min, 
        int max,
        int mode, 
        int use_titles,
        long over_delay,
        long peak_delay)
 : BC_SubWindow(x, y, -1, -1)
{
        this->use_titles = use_titles;
        this->over_delay = over_delay;
        this->peak_delay = peak_delay;
        this->min = min;
        this->max = max;
        this->mode = mode;
        this->orientation = orientation;
        this->pixels = pixels;
        for(int i = 0; i < TOTAL_METER_IMAGES; i++) images[i] = 0;
        db_titles.set_array_delete();
}

BC_Meter::~BC_Meter()
{
        db_titles.remove_all_objects();
        title_pixels.remove_all();
        tick_pixels.remove_all();
        for(int i = 0; i < TOTAL_METER_IMAGES; i++) delete images[i];
}

int BC_Meter::get_title_w()
{
        return get_resources()->meter_title_w;
}

int BC_Meter::get_meter_w()
{
        return get_resources()->ymeter_images[0]->get_w() + 2;
}


int BC_Meter::set_delays(int over_delay, int peak_delay)
{
        this->over_delay = over_delay;
        this->peak_delay = peak_delay;
        return 0;
}

int BC_Meter::initialize()
{
        peak_timer = 0;
        level_pixel = peak_pixel = 0;
        over_timer = 0;
        over_count = 0;
        peak = level = -100;

        if(orientation == METER_VERT)
        {
                set_images(get_resources()->ymeter_images);
                h = pixels;
                w = images[0]->get_w();
                if(use_titles) w += get_title_w();
        }
        else
        {
                set_images(get_resources()->xmeter_images);
                h = images[0]->get_h();
                w = pixels;
                if(use_titles) h += get_title_w();
        }

// calibrate the db titles
        get_divisions();

        BC_SubWindow::initialize();
        draw_titles();
        draw_face();
        return 0;
}

void BC_Meter::set_images(VFrame **data)
{
        for(int i = 0; i < TOTAL_METER_IMAGES; i++) delete images[i];
        for(int i = 0; i < TOTAL_METER_IMAGES; i++) 
                images[i] = new BC_Pixmap(parent_window, data[i], PIXMAP_ALPHA);
}

int BC_Meter::reposition_window(int x, int y, int pixels)
{
        if(pixels < 0) pixels = this->pixels;
        this->pixels = pixels;
        if(orientation == METER_VERT)
                BC_SubWindow::reposition_window(x, y, get_w(), pixels);
        else
                BC_SubWindow::reposition_window(x, y, pixels, get_h());

//printf("BC_Meter::reposition_window 1 %d %d %d %d\n", x, y, w, h);
        get_divisions();

//set_color(WHITE);
//draw_box(0, 0, w, h);
//flash();      
//return 0;
        draw_titles();
        draw_face();
        return 0;
}

int BC_Meter::reset()
{
        level = min;
        peak = min;
        level_pixel = peak_pixel = 0;
        peak_timer = 0;
        over_timer = 0;
        over_count = 0;
        draw_face();
        return 0;
}

int BC_Meter::button_press_event()
{
        if(cursor_inside() && is_event_win())
        {
                reset_over();
                return 1;
        }
        return 0;
}


int BC_Meter::reset_over()
{
        over_timer = 0;
        return 0;
}

int BC_Meter::change_format(int mode, int min, int max)
{
        this->mode = mode;
        this->min = min;
        this->max = max;
        reposition_window(get_x(), get_y(), pixels);
        return 0;
}

int BC_Meter::level_to_pixel(float level)
{
        int result;
        if(mode == METER_DB)
        {
                result = (int)(pixels * 
                        (level - min) / 
                        (max - min));
                if(level <= min) result = 0;
        }
        else
        {
// Not implemented anymore
                result = 0;
        }
        
        return result;
}


void BC_Meter::get_divisions()
{
        int i;
        int j, j_step;
        int division, division_step;
        char string[BCTEXTLEN];
        char *new_string;


        db_titles.remove_all_objects();
        title_pixels.remove_all();
        tick_pixels.remove_all();

        low_division = 0;
        medium_division = 0;
        high_division = pixels;

        int current_pixel;
// Create tick marks and titles in one pass
        for(int current = min; current <= max; current++)
        {
                if(orientation == METER_VERT)
                {
// Create tick mark
                        current_pixel = (pixels - METER_MARGIN * 2 - 2) * 
                                (current - min) /
                                (max - min) + 2;
                        tick_pixels.append(current_pixel);

// Create titles in selected positions
                        if(current == min || 
                                current == max ||
                                current == 0 ||
                                (current - min > 4 && max - current > 4 && !(current % 5)))
                        {
                                int title_pixel = (pixels - 
                                        METER_MARGIN * 2) * 
                                        (current - min) /
                                        (max - min);
                                sprintf(string, "%d", labs(current));
                                new_string = new char[strlen(string) + 1];
                                strcpy(new_string, string);
                                db_titles.append(new_string);
                                title_pixels.append(title_pixel);
                        }
                }
                else
                {
                        current_pixel = (pixels - METER_MARGIN * 2) *
                                (current - min) /
                                (max - min);
                        tick_pixels.append(current_pixel);
// Titles not supported for horizontal
                }

// Create color divisions
                if(current == -20)
                {
                        low_division = current_pixel;
                }
                else
                if(current == -5)
                {
                        medium_division = current_pixel;
                }
                else
                if(current == 0)
                {
                        high_division = current_pixel;
                }
        }
// if(orientation == METER_VERT)
// printf("BC_Meter::get_divisions %d %d %d %d\n",
// low_division, medium_division, high_division, pixels);
}

void BC_Meter::draw_titles()
{
        if(!use_titles) return;

        set_font(get_resources()->meter_font);

        if(orientation == METER_HORIZ)
        {
                draw_top_background(parent_window, 0, 0, get_w(), get_title_w());

                for(int i = 0; i < db_titles.total; i++)
                {
                        draw_text(0, title_pixels.values[i], db_titles.values[i]);
                }

                flash(0, 0, get_w(), get_title_w());
        }
        else
        if(orientation == METER_VERT)
        {
                draw_top_background(parent_window, 0, 0, get_title_w(), get_h());

// Titles
                for(int i = 0; i < db_titles.total; i++)
                {
                        int title_y = pixels - 
                                title_pixels.values[i];
                        if(i == 0) 
                                title_y -= get_text_descent(SMALLFONT_3D);
                        else
                        if(i == db_titles.total - 1)
                                title_y += get_text_ascent(SMALLFONT_3D);
                        else
                                title_y += get_text_ascent(SMALLFONT_3D) / 2;

                        set_color(get_resources()->meter_font_color);
                        draw_text(0, 
                                title_y,
                                db_titles.values[i]);
                }

                for(int i = 0; i < tick_pixels.total; i++)
                {
// Tick marks
                        int tick_y = pixels - tick_pixels.values[i] - METER_MARGIN;
                        set_color(get_resources()->meter_font_color);
                        draw_line(get_title_w() - 10 - 1, tick_y, get_title_w() - 1, tick_y);
                        if(get_resources()->meter_3d)
                        {
                                set_color(BLACK);
                                draw_line(get_title_w() - 10, tick_y + 1, get_title_w(), tick_y + 1);
                        }
                }

                flash(0, 0, get_title_w(), get_h());
        }
}

int BC_Meter::region_pixel(int region)
{
        VFrame **reference_images = get_resources()->xmeter_images;
        int result;

        if(region == METER_RIGHT) 
                result = region * reference_images[0]->get_w() / 4;
        else
                result = region * reference_images[0]->get_w() / 4;

        return result;
}

int BC_Meter::region_pixels(int region)
{
        int x1;
        int x2;
        int result;
        VFrame **reference_images = get_resources()->xmeter_images;
        
        x1 = region * reference_images[0]->get_w() / 4;
        x2 = (region + 1) * reference_images[0]->get_w() / 4;
        if(region == METER_MID) 
                result = (x2 - x1) * 2;
        else 
                result = x2 - x1;
        return result;
}

void BC_Meter::draw_face()
{
        VFrame **reference_images = get_resources()->xmeter_images;
        int level_pixel = level_to_pixel(level);
        int peak_pixel2 = level_to_pixel(peak);
        int peak_pixel1 = peak_pixel2 - 2;
        int left_pixel = region_pixel(METER_MID);
        int right_pixel = pixels - region_pixels(METER_RIGHT);
        int pixel = 0;
        int image_number = 0, region = 0;
        int in_span, in_start;
        int x = use_titles ? get_title_w() : 0;
        int w = use_titles ? this->w - get_title_w() : this->w;

        draw_top_background(parent_window, x, 0, w, h);
//printf("BC_Meter::draw_face %d %d\n", w, h);

        while(pixel < pixels)
        {
// Select image to draw
                if(pixel < level_pixel ||
                        (pixel >= peak_pixel1 && pixel < peak_pixel2))
                {
                        if(pixel < low_division)
                                image_number = METER_GREEN;
                        else
                        if(pixel < medium_division)
                                image_number = METER_YELLOW;
                        else
                        if(pixel < high_division)
                                image_number = METER_RED;
                        else
                                image_number = METER_WHITE;
                }
                else
                {
                        image_number = METER_NORMAL;
                }

// Select region of image to duplicate
                if(pixel < left_pixel)
                {
                        region = METER_LEFT;
                        in_start = pixel + region_pixel(region);
                        in_span = region_pixels(region) - (in_start - region_pixel(region));
                }
                else
                if(pixel < right_pixel)
                {
                        region = METER_MID;
                        in_start = region_pixel(region);
                        in_span = region_pixels(region);
                }
                else
                {
                        region = METER_RIGHT;
                        in_start = (pixel - right_pixel) + region_pixel(region);
                        in_span = region_pixels(region) - (in_start - region_pixel(region));;
                }

//printf("BC_Meter::draw_face region %d pixel %d pixels %d in_start %d in_span %d\n", region, pixel, pixels, in_start, in_span);
                if(in_span > 0)
                {
// Clip length to peaks
                        if(pixel < level_pixel && pixel + in_span > level_pixel)
                                in_span = level_pixel - pixel;
                        else
                        if(pixel < peak_pixel1 && pixel + in_span > peak_pixel1)
                                in_span = peak_pixel1 - pixel;
                        else
                        if(pixel < peak_pixel2 && pixel + in_span > peak_pixel2) 
                                in_span = peak_pixel2 - pixel;

// Clip length to color changes
                        if(image_number == METER_GREEN && pixel + in_span > low_division)
                                in_span = low_division - pixel;
                        else
                        if(image_number == METER_YELLOW && pixel + in_span > medium_division)
                                in_span = medium_division - pixel;
                        else
                        if(image_number == METER_RED && pixel + in_span > high_division)
                                in_span = high_division - pixel;

// Clip length to regions
                        if(pixel < left_pixel && pixel + in_span > left_pixel)
                                in_span = left_pixel - pixel;
                        else
                        if(pixel < right_pixel && pixel + in_span > right_pixel)
                                in_span = right_pixel - pixel;

//printf("BC_Meter::draw_face image_number %d pixel %d pixels %d in_start %d in_span %d\n", image_number, pixel, pixels, in_start, in_span);
//printf("BC_Meter::draw_face %d %d %d %d\n", orientation, region, images[image_number]->get_h() - in_start - in_span);
                        if(orientation == METER_HORIZ)
                                draw_pixmap(images[image_number], 
                                        pixel, 
                                        x, 
                                        in_span + 1, 
                                        get_h(), 
                                        in_start, 
                                        0);
                        else
                                draw_pixmap(images[image_number],
                                        x,
                                        get_h() - pixel - in_span,
                                        get_w(),
                                        in_span + 1,
                                        0,
                                        images[image_number]->get_h() - in_start - in_span);

                        pixel += in_span;
                }
                else
                {
// Sanity check
                        break;
                }
        }

        if(over_timer)
        {
                if(orientation == METER_HORIZ)
                        draw_pixmap(images[METER_OVER], 
                                10, 
                                2);
                else
                        draw_pixmap(images[METER_OVER],
                                x + 2,
                                get_h() - 100);

                over_timer--;
        }

        if(orientation == METER_HORIZ)
                flash(0, 0, pixels, get_h());
        else
                flash(x, 0, w, pixels);
        flush();
}

int BC_Meter::update(float new_value, int over)
{
        peak_timer++;

        if(mode == METER_DB)
        {
                if(new_value == 0) 
                        level = min;
                else
                        level = db.todb(new_value);        // db value
        }

        if(level > peak || peak_timer > peak_delay)
        {
                peak = level;
                peak_timer = 0;
        }

// if(orientation == METER_HORIZ)
// printf("BC_Meter::update %f\n", level);
        if(over) over_timer = over_delay;       
// only draw if window is visible

        draw_face();
        return 0;
}

---