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Clean up, simplify and fix small bugs in color picker.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23111 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2009-10-11 16:57:08 +00:00
parent 3b549fedbb
commit b4097dd0e4
1 changed files with 118 additions and 118 deletions
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236
apps/gui/color_picker.c
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@ -110,14 +110,10 @@ static inline unsigned get_black_or_white(const struct rgb_pick *rgb)
LCD_BLACK : LCD_WHITE;
}
#define MARGIN_LEFT 0 /* Left margin of screen */
#define MARGIN_TOP 2 /* Top margin of screen */
#define MARGIN_RIGHT 0 /* Right margin of screen */
#define MARGIN_BOTTOM 6 /* Bottom margin of screen */
#define SLIDER_MARGIN_LEFT 2 /* Gap to left of sliders */
#define SLIDER_MARGIN_RIGHT 2 /* Gap to right of sliders */
#define SLIDER_TEXT_MARGIN 2 /* Gap between text and sliders */
#define TITLE_MARGIN_BOTTOM 4 /* Space below title bar */
#define SELECTOR_LR_MARGIN 0 /* Margin between ">" and text */
#define SELECTOR_TB_MARGIN 1 /* Margin on top and bottom of selector */
#define SWATCH_TOP_MARGIN 4 /* Space between last slider and swatch */
#define SELECTOR_WIDTH get_icon_width(display->screen_type)
@ -135,15 +131,33 @@ static void set_drawinfo(struct screen *display, int mode,
}
}
/* Figure out widest label character in case they vary -
this function assumes labels are one character */
static int label_get_max_width(struct screen *display)
{
int max_width, i;
char buf[4];
for (i = 0, max_width = 0; i < 3; i++)
{
int width;
buf[0] = str(LANG_COLOR_RGB_LABELS)[i];
buf[1] = '\0';
width = display->getstringsize(buf, NULL, NULL);
if (width > max_width)
max_width = width;
}
return max_width;
}
static void draw_screen(struct screen *display, char *title,
struct rgb_pick *rgb, int row)
{
unsigned text_color = LCD_BLACK;
unsigned background_color = LCD_WHITE;
char buf[32];
int i, x, y;
int i, text_x, y, line_height;
int text_top;
int slider_left, slider_width;
int slider_x, slider_width;
bool display_three_rows;
int max_label_width;
struct viewport vp;
@ -159,40 +173,30 @@ static void draw_screen(struct screen *display, char *title,
background_color = display->get_background();
}
max_label_width = label_get_max_width(display);
/* Draw title string */
set_drawinfo(display, DRMODE_SOLID, text_color, background_color);
vp.flags |= VP_FLAG_CENTER_ALIGN;
display->getstringsize(title, NULL, &y);
display->putsxy(0, MARGIN_TOP, title);
/* Get slider positions and top starting position */
text_top = MARGIN_TOP + y + TITLE_MARGIN_BOTTOM + SELECTOR_TB_MARGIN;
text_x = SELECTOR_WIDTH;
slider_x = text_x + max_label_width + SLIDER_TEXT_MARGIN;
slider_width = vp.width - slider_x*2 - max_label_width;
line_height = display->getcharheight() + 2*SELECTOR_TB_MARGIN;
/* Find out if there's enough room for three sliders or just
enough to display the selected slider - calculate total height
of display with three sliders present */
display_three_rows =
vp.height >=
MARGIN_TOP +
display->getcharheight()*4 + /* Title + 3 sliders */
TITLE_MARGIN_BOTTOM +
SELECTOR_TB_MARGIN*6 + /* 2 margins/slider */
MARGIN_BOTTOM;
/* Figure out widest label character in case they vary -
this function assumes labels are one character */
for (i = 0, max_label_width = 0; i < 3; i++)
{
buf[0] = str(LANG_COLOR_RGB_LABELS)[i];
buf[1] = '\0';
x = display->getstringsize(buf, NULL, NULL);
if (x > max_label_width)
max_label_width = x;
}
/* Draw title string */
set_drawinfo(display, DRMODE_SOLID, text_color, background_color);
display->getstringsize(title, &x, &y);
display->putsxy((vp.width - x) / 2, MARGIN_TOP, title);
/* Get slider positions and top starting position */
text_top = MARGIN_TOP + y + TITLE_MARGIN_BOTTOM + SELECTOR_TB_MARGIN;
slider_left = MARGIN_LEFT + SELECTOR_WIDTH + SELECTOR_LR_MARGIN +
max_label_width + SLIDER_MARGIN_LEFT;
slider_width = vp.width - slider_left - SLIDER_MARGIN_RIGHT -
display->getcharwidth()*2 - SELECTOR_LR_MARGIN -
SELECTOR_WIDTH - MARGIN_RIGHT;
text_top + line_height*3 + /* Title + 3 sliders */
SWATCH_TOP_MARGIN + /* at least 2 lines */
display->getcharheight()*2 + /* + margins for bottom */
MARGIN_BOTTOM; /* colored rectangle */
for (i = 0; i < 3; i++)
{
@ -201,9 +205,6 @@ static void draw_screen(struct screen *display, char *title,
unsigned fg = text_color;
unsigned bg = background_color;
if (!display_three_rows)
i = row;
if (i == row)
{
set_drawinfo(display, DRMODE_SOLID, text_color,
@ -229,9 +230,9 @@ static void draw_screen(struct screen *display, char *title,
/* Draw "> <" around sliders */
int top = text_top + (display->getcharheight() -
SELECTOR_HEIGHT) / 2;
screen_put_iconxy(display, MARGIN_LEFT, top, Icon_Cursor);
screen_put_iconxy(display, 0, top, Icon_Cursor);
screen_put_iconxy(display,
vp.width - MARGIN_RIGHT -
vp.width -
get_icon_width(display->screen_type),
top, Icon_Cursor);
}
@ -244,85 +245,77 @@ static void draw_screen(struct screen *display, char *title,
bg = prim_rgb[SB_FILL][i];
}
}
else if (!display_three_rows)
continue;
set_drawinfo(display, mode, fg, bg);
/* Draw label */
buf[0] = str(LANG_COLOR_RGB_LABELS)[i];
buf[1] = '\0';
display->putsxy(slider_left - max_label_width -
SLIDER_MARGIN_LEFT, text_top, buf);
vp.flags &= ~VP_FLAG_ALIGNMENT_MASK;
display->putsxy(text_x, text_top, buf);
/* Draw color value */
snprintf(buf, 3, "%02d", rgb->rgb_val[i]);
display->putsxy(slider_left + slider_width + SLIDER_MARGIN_RIGHT,
text_top, buf);
vp.flags |= VP_FLAG_IS_RTL;
display->putsxy(text_x, text_top, buf);
/* Draw scrollbar */
gui_scrollbar_draw(display,
slider_left,
text_top + display->getcharheight() / 4,
slider_width,
display->getcharheight() / 2,
rgb_max[i],
0,
rgb->rgb_val[i],
sb_flags);
gui_scrollbar_draw(display, /* screen */
slider_x, /* x */
text_top + display->getcharheight() / 4,/* y */
slider_width, /* width */
display->getcharheight() / 2, /* height */
rgb_max[i], /* items */
0, /* min_shown */
rgb->rgb_val[i], /* max_shown */
sb_flags); /* flags */
/* Advance to next line */
text_top += display->getcharheight() + 2*SELECTOR_TB_MARGIN;
if (!display_three_rows)
break;
text_top += line_height;
} /* end for */
/* Format RGB: #rrggbb */
snprintf(buf, sizeof(buf), str(LANG_COLOR_RGB_VALUE),
rgb->red, rgb->green, rgb->blue);
vp.flags |= VP_FLAG_CENTER_ALIGN;
if (display->depth >= 16)
{
/* Display color swatch on color screens only */
int left = MARGIN_LEFT + SELECTOR_WIDTH + SELECTOR_LR_MARGIN;
int top = text_top + SWATCH_TOP_MARGIN;
int width = vp.width - left - SELECTOR_LR_MARGIN -
SELECTOR_WIDTH - MARGIN_RIGHT;
int width = vp.width - text_x*2;
int height = vp.height - top - MARGIN_BOTTOM;
/* Only draw if room */
if (height >= display->getcharheight() + 2)
{
/* draw the big rectangle */
display->set_foreground(rgb->color);
display->fillrect(left, top, width, height);
display->fillrect(text_x, top, width, height);
/* Draw RGB: #rrggbb in middle of swatch */
display->set_drawmode(DRMODE_FG);
display->getstringsize(buf, &x, &y);
display->set_foreground(get_black_or_white(rgb));
set_drawinfo(display, DRMODE_FG, get_black_or_white(rgb),
background_color);
display->getstringsize(buf, NULL, &y);
x = left + (width - x) / 2;
y = top + (height - y) / 2;
display->putsxy(0, top + (height - y) / 2, buf);
display->putsxy(x, y, buf);
display->set_drawmode(DRMODE_SOLID);
/* Draw border */
display->set_foreground(text_color);
display->drawrect(left, top, width, height);
/* Draw border around the rect */
set_drawinfo(display, DRMODE_SOLID, text_color,
background_color);
display->drawrect(text_x, top, width, height);
}
}
else
{
/* Display RGB value only centered on remaining display if room */
display->getstringsize(buf, &x, &y);
display->getstringsize(buf, NULL, &y);
i = text_top + SWATCH_TOP_MARGIN;
if (i + y <= display->getheight() - MARGIN_BOTTOM)
{
set_drawinfo(display, DRMODE_SOLID, text_color, background_color);
x = (vp.width - x) / 2;
y = (i + vp.height - MARGIN_BOTTOM - y) / 2;
display->putsxy(x, y, buf);
display->putsxy(0, (i + vp.height - MARGIN_BOTTOM - y) / 2, buf);
}
}
@ -335,53 +328,55 @@ static void draw_screen(struct screen *display, char *title,
}
#ifdef HAVE_TOUCHSCREEN
static int touchscreen_slider(struct rgb_pick *rgb, int *selected_slider)
static int touchscreen_slider(struct screen *display,
struct rgb_pick *rgb,
const char* title,
int *selected_slider)
{
short x,y;
int text_top,i,x1;
int slider_left, slider_width;
int text_top, slider_x, slider_width, title_height;
unsigned button = action_get_touchscreen_press(&x, &y);
bool display_three_rows;
int max_label_width;
struct screen *display = &screens[SCREEN_MAIN];
int pressed_slider;
char buf[2];
struct viewport vp;
int line_height;
viewport_set_defaults(&vp, display->screen_type);
if (button == BUTTON_NONE)
return ACTION_NONE;
/* same logic as draw_screen */
/* Figure out widest label character in case they vary -
this function assumes labels are one character */
for (i = 0, max_label_width = 0; i < 3; i++)
{
buf[0] = str(LANG_COLOR_RGB_LABELS)[i];
buf[1] = '\0';
x1 = display->getstringsize(buf, NULL, NULL);
if (x1 > max_label_width)
max_label_width = x1;
}
/* Get slider positions and top starting position */
text_top = MARGIN_TOP + display->getcharheight() + TITLE_MARGIN_BOTTOM +
max_label_width = label_get_max_width(display);
display->getstringsize(title, NULL, &title_height);
/* Get slider positions and top starting position
* need vp.y here, because of the statusbar, since touchscreen
* coordinates are absolute */
text_top = vp.y + MARGIN_TOP + title_height + TITLE_MARGIN_BOTTOM +
SELECTOR_TB_MARGIN;
slider_left = MARGIN_LEFT + SELECTOR_WIDTH + SELECTOR_LR_MARGIN +
max_label_width + SLIDER_MARGIN_LEFT;
slider_width = display->getwidth() - slider_left - SLIDER_MARGIN_RIGHT -
display->getcharwidth()*2 - SELECTOR_LR_MARGIN -
SELECTOR_WIDTH - MARGIN_RIGHT;
slider_x = SELECTOR_WIDTH + max_label_width + SLIDER_TEXT_MARGIN;
slider_width = vp.width - slider_x*2 - max_label_width;
line_height = display->getcharheight() + 2*SELECTOR_TB_MARGIN;
/* same logic as in draw_screen */
/* Find out if there's enough room for three sliders or just
enough to display the selected slider - calculate total height
of display with three sliders present */
display_three_rows =
display->getheight() >=
MARGIN_TOP +
display->getcharheight()*4 + /* Title + 3 sliders */
TITLE_MARGIN_BOTTOM +
SELECTOR_TB_MARGIN*6 + /* 2 margins/slider */
MARGIN_BOTTOM;
if (y < MARGIN_TOP+display->getcharheight())
vp.height >=
text_top + title_height*3 + /* Title + 3 sliders */
SWATCH_TOP_MARGIN + /* at least 2 lines */
display->getcharheight()*2 + /* + margins for bottom */
MARGIN_BOTTOM; /* colored rectangle */
if (y < text_top)
{
if (button == BUTTON_REL)
return ACTION_STD_CANCEL;
}
y -= text_top;
pressed_slider = y/display->getcharheight();
pressed_slider = (y - text_top)/line_height;
if (pressed_slider > (display_three_rows?2:0))
{
if (button == BUTTON_REL)
@ -389,12 +384,16 @@ static int touchscreen_slider(struct rgb_pick *rgb, int *selected_slider)
}
if (pressed_slider != *selected_slider)
*selected_slider = pressed_slider;
if (x < slider_left+slider_width &&
x > slider_left)
/* add max_label_width to overcome integer division limits,
* cap value later since that may lead to an overflow */
if (x < slider_x+(slider_width+max_label_width) &&
x > slider_x)
{
x -= slider_left;
rgb->rgb_val[pressed_slider] =
(x*rgb_max[pressed_slider]/(slider_width-slider_left));
char computed_val;
x -= slider_x;
computed_val = (x*rgb_max[pressed_slider]/(slider_width));
rgb->rgb_val[pressed_slider] =
MIN(computed_val,rgb_max[pressed_slider]);
pack_rgb(rgb);
}
return ACTION_NONE;
@ -433,8 +432,9 @@ bool set_color(struct screen *display, char *title, unsigned *color,
button = get_action(CONTEXT_SETTINGS_COLOURCHOOSER, TIMEOUT_BLOCK);
#ifdef HAVE_TOUCHSCREEN
if (button == ACTION_TOUCHSCREEN)
button = touchscreen_slider(&rgb, &slider);
if (button == ACTION_TOUCHSCREEN
&& display->screen_type == SCREEN_MAIN)
button = touchscreen_slider(display, &rgb, title, &slider);
#endif
switch (button)