/** * Draw a rectangle which has gradient on its top and bottom * @param roller pointer to a roller object * @param mask pointer to the current mask (from the design function) */ static void draw_bg(lv_obj_t *roller, const lv_area_t *mask) { lv_style_t *style = lv_roller_get_style(roller, LV_ROLLER_STYLE_BG); lv_area_t half_mask; lv_area_t half_roller; lv_coord_t h = lv_obj_get_height(roller); bool union_ok; lv_area_copy(&half_roller, &roller->coords); half_roller.x1 -= roller->ext_size; /*Add ext size too (e.g. because of shadow draw) */ half_roller.x2 += roller->ext_size; half_roller.y1 -= roller->ext_size; half_roller.y2 = roller->coords.y1 + h / 2; union_ok = lv_area_union(&half_mask, &half_roller, mask); half_roller.x1 += roller->ext_size; /*Revert ext. size adding*/ half_roller.x2 -= roller->ext_size; half_roller.y1 += roller->ext_size; half_roller.y2 += style->body.radius; if(union_ok) { lv_draw_rect(&half_roller, &half_mask, style); } half_roller.x1 -= roller->ext_size; /*Add ext size too (e.g. because of shadow draw) */ half_roller.x2 += roller->ext_size; half_roller.y2 = roller->coords.y2 + roller->ext_size; half_roller.y1 = roller->coords.y1 + h / 2; if((h & 0x1) == 0) half_roller.y1++; /*With even height the pixels in the middle would be drawn twice*/ union_ok = lv_area_union(&half_mask, &half_roller, mask); half_roller.x1 += roller->ext_size; /*Revert ext. size adding*/ half_roller.x2 -= roller->ext_size; half_roller.y2 -= roller->ext_size; half_roller.y1 -= style->body.radius; if(union_ok){ lv_color_t main_tmp = style->body.main_color; lv_color_t grad_tmp = style->body.grad_color; style->body.main_color = grad_tmp; style->body.grad_color = main_tmp; lv_draw_rect(&half_roller, &half_mask, style); style->body.main_color = main_tmp; style->body.grad_color = grad_tmp; } }
/** * Handle the drawing related tasks of the rollers * @param roller pointer to an object * @param mask the object will be drawn only in this area * @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area * (return 'true' if yes) * LV_DESIGN_DRAW: draw the object (always return 'true') * LV_DESIGN_DRAW_POST: drawing after every children are drawn * @param return true/false, depends on 'mode' */ static bool lv_roller_design(lv_obj_t * roller, const lv_area_t * mask, lv_design_mode_t mode) { /*Return false if the object is not covers the mask_p area*/ if(mode == LV_DESIGN_COVER_CHK) { return false; } /*Draw the object*/ else if(mode == LV_DESIGN_DRAW_MAIN) { draw_bg(roller, mask); lv_style_t *style = lv_roller_get_style(roller, LV_ROLLER_STYLE_BG); const lv_font_t * font = style->text.font; lv_roller_ext_t * ext = lv_obj_get_ext_attr(roller); lv_coord_t font_h = lv_font_get_height_scale(font); lv_area_t rect_area; rect_area.y1 = roller->coords.y1 + lv_obj_get_height(roller) / 2 - font_h / 2 - style->text.line_space / 2; rect_area.y2 = rect_area.y1 + font_h + style->text.line_space; rect_area.x1 = roller->coords.x1; rect_area.x2 = roller->coords.x2; lv_draw_rect(&rect_area, mask, ext->ddlist.sel_style); } /*Post draw when the children are drawn*/ else if(mode == LV_DESIGN_DRAW_POST) { lv_style_t *style = lv_roller_get_style(roller, LV_ROLLER_STYLE_BG); lv_roller_ext_t * ext = lv_obj_get_ext_attr(roller); const lv_font_t * font = style->text.font; lv_coord_t font_h = lv_font_get_height_scale(font); /*Redraw the text on the selected area with a different color*/ lv_area_t rect_area; rect_area.y1 = roller->coords.y1 + lv_obj_get_height(roller) / 2 - font_h / 2 - style->text.line_space / 2; rect_area.y2 = rect_area.y1 + font_h + style->text.line_space; rect_area.x1 = roller->coords.x1; rect_area.x2 = roller->coords.x2; lv_area_t mask_sel; bool area_ok; area_ok = lv_area_union(&mask_sel, mask, &rect_area); if(area_ok) { lv_style_t *sel_style = lv_roller_get_style(roller, LV_ROLLER_STYLE_SEL); lv_style_t new_style; lv_style_copy(&new_style, style); new_style.text.color = sel_style->text.color; new_style.text.opa = sel_style->text.opa; lv_draw_label(&ext->ddlist.label->coords, &mask_sel, &new_style, lv_label_get_text(ext->ddlist.label), LV_TXT_FLAG_CENTER, NULL); } } return true; }
/** * Handle the drawing related tasks of the drop down lists * @param ddlist pointer to an object * @param mask the object will be drawn only in this area * @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area * (return 'true' if yes) * LV_DESIGN_DRAW: draw the object (always return 'true') * LV_DESIGN_DRAW_POST: drawing after every children are drawn * @param return true/false, depends on 'mode' */ static bool lv_ddlist_design(lv_obj_t * ddlist, const lv_area_t * mask, lv_design_mode_t mode) { /*Return false if the object is not covers the mask_p area*/ if(mode == LV_DESIGN_COVER_CHK) { return ancestor_design(ddlist, mask, mode); } /*Draw the object*/ else if(mode == LV_DESIGN_DRAW_MAIN) { ancestor_design(ddlist, mask, mode); lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist); /*If the list is opened draw a rectangle under the selected item*/ if(ext->opened != 0) { lv_style_t *style = lv_ddlist_get_style(ddlist, LV_DDLIST_STYLE_BG); const lv_font_t * font = style->text.font; lv_coord_t font_h = lv_font_get_height(font); /*Draw the selected*/ lv_area_t rect_area; rect_area.y1 = ext->label->coords.y1; rect_area.y1 += ext->sel_opt_id * (font_h + style->text.line_space); rect_area.y1 -= style->text.line_space / 2; rect_area.y2 = rect_area.y1 + font_h + style->text.line_space; rect_area.x1 = ddlist->coords.x1; rect_area.x2 = ddlist->coords.x2; lv_draw_rect(&rect_area, mask, ext->sel_style); } } /*Post draw when the children are drawn*/ else if(mode == LV_DESIGN_DRAW_POST) { ancestor_design(ddlist, mask, mode); /*Redraw the text on the selected area with a different color*/ lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist); /*Redraw only in opened state*/ if(ext->opened == 0) return true; lv_style_t *style = lv_ddlist_get_style(ddlist, LV_DDLIST_STYLE_BG); const lv_font_t * font = style->text.font; lv_coord_t font_h = lv_font_get_height(font); lv_area_t area_sel; area_sel.y1 = ext->label->coords.y1; area_sel.y1 += ext->sel_opt_id * (font_h + style->text.line_space); area_sel.y1 -= style->text.line_space / 2; area_sel.y2 = area_sel.y1 + font_h + style->text.line_space; area_sel.x1 = ddlist->coords.x1; area_sel.x2 = ddlist->coords.x2; lv_area_t mask_sel; bool area_ok; area_ok = lv_area_union(&mask_sel, mask, &area_sel); if(area_ok) { lv_style_t *sel_style = lv_ddlist_get_style(ddlist, LV_DDLIST_STYLE_SEL); lv_style_t new_style; lv_style_copy(&new_style, style); new_style.text.color = sel_style->text.color; new_style.text.opa = sel_style->text.opa; lv_draw_label(&ext->label->coords, &mask_sel, &new_style, lv_label_get_text(ext->label), LV_TXT_FLAG_NONE, NULL); } } return true; }