mirror of
https://gitee.com/zlgopen/awtk.git
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155 lines
4.8 KiB
C
155 lines
4.8 KiB
C
/**
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* File: demo_scroll_view.c
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* Author: AWTK Develop Team
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* Brief: test scroll view
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*
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* Copyright (c) 2018 - 2021 Guangzhou ZHIYUAN Electronics Co.,Ltd.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* License file for more details.
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*
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*/
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/**
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* History:
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* ================================================================
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* 2021-01-22 Luo ZhiMing <luozhiming@zlg.cn> created
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*
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*/
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#include "awtk.h"
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#include "ext_widgets.h"
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widget_t* bar_h = NULL;
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widget_t* bar_v = NULL;
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widget_t* scroll_view = NULL;
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#define SCROLL_BAR_H_WIDGT_NAME "bar_h"
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#define SCROLL_BAR_V_WIDGT_NAME "bar_v"
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#define BUTTON_SET_FOCUSE_STRING "focused:"
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static int32_t scroll_bar_value_to_scroll_view_offset_y(scroll_bar_t* scroll_bar,
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scroll_view_t* sv) {
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int32_t range = 0;
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float_t percent = 0;
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range = scroll_bar->virtual_size;
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percent = range > 0 ? (float_t)scroll_bar->value / (float_t)(range) : 0;
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return percent * (sv->virtual_h - sv->widget.h);
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}
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static int32_t scroll_bar_value_to_scroll_view_offset_x(scroll_bar_t* scroll_bar,
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scroll_view_t* sv) {
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int32_t range = 0;
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float_t percent = 0;
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range = scroll_bar->virtual_size;
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percent = range > 0 ? (float_t)scroll_bar->value / (float_t)(range) : 0;
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return percent * (sv->virtual_w - sv->widget.w);
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}
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static int32_t scroll_bar_value_from_scroll_view_offset_y(scroll_bar_t* scroll_bar,
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scroll_view_t* sv) {
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int32_t range = 0;
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float_t percent = 0;
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range = sv->virtual_h - sv->widget.h;
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percent = range > 0 ? (float_t)sv->yoffset / (float_t)range : 0;
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return percent * scroll_bar->virtual_size;
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}
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static int32_t scroll_bar_value_from_scroll_view_offset_x(scroll_bar_t* scroll_bar,
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scroll_view_t* sv) {
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int32_t range = 0;
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float_t percent = 0;
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range = sv->virtual_w - sv->widget.w;
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percent = range > 0 ? (float_t)sv->xoffset / (float_t)range : 0;
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return percent * scroll_bar->virtual_size;
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}
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static ret_t scroll_bar_value_changed(void* ctx, event_t* e) {
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scroll_view_t* sv = SCROLL_VIEW(scroll_view);
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scroll_bar_t* scroll_bar_h = SCROLL_BAR(bar_h);
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scroll_bar_t* scroll_bar_v = SCROLL_BAR(bar_v);
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int32_t offset_x = scroll_bar_value_to_scroll_view_offset_x(scroll_bar_h, sv);
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int32_t offset_y = scroll_bar_value_to_scroll_view_offset_y(scroll_bar_v, sv);
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scroll_view_set_offset(scroll_view, offset_x, offset_y);
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return RET_OK;
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}
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static ret_t on_set_focuse_item(void* ctx, event_t* e) {
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const char* name = (const char*)ctx;
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if (name != NULL) {
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widget_t* item = widget_lookup(scroll_view, name, TRUE);
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widget_set_focused(item, TRUE);
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}
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return RET_OK;
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}
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static ret_t scroll_view_offset_changed(void* ctx, event_t* e) {
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scroll_view_t* sv = SCROLL_VIEW(scroll_view);
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scroll_bar_t* scroll_bar_h = SCROLL_BAR(bar_h);
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scroll_bar_t* scroll_bar_v = SCROLL_BAR(bar_v);
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int32_t value_x = scroll_bar_value_from_scroll_view_offset_x(scroll_bar_h, sv);
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int32_t value_y = scroll_bar_value_from_scroll_view_offset_y(scroll_bar_v, sv);
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scroll_bar_set_value_only(bar_h, value_x);
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scroll_bar_set_value_only(bar_v, value_y);
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return RET_OK;
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}
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static ret_t install_one(void* ctx, const void* iter) {
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widget_t* widget = WIDGET(iter);
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if (widget->name != NULL) {
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const char* name = widget->name;
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if (strstr(name, BUTTON_SET_FOCUSE_STRING) != NULL) {
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widget_on(widget, EVT_CLICK, on_set_focuse_item,
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(void*)(name + tk_strlen(BUTTON_SET_FOCUSE_STRING)));
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} else if (tk_str_eq(name, SCROLL_BAR_H_WIDGT_NAME)) {
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bar_h = widget;
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widget_on(widget, EVT_VALUE_CHANGED, scroll_bar_value_changed, widget);
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} else if (tk_str_eq(name, SCROLL_BAR_V_WIDGT_NAME)) {
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bar_v = widget;
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widget_on(widget, EVT_VALUE_CHANGED, scroll_bar_value_changed, widget);
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}
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} else if (tk_str_eq(widget->vt->type, "scroll_view")) {
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scroll_view = widget;
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widget_on(widget, EVT_SCROLL, scroll_view_offset_changed, widget);
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}
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return RET_OK;
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}
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ret_t on_idle_scroll_view_set_virtual_wh(const idle_info_t* idle) {
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scroll_view_t* sv = SCROLL_VIEW(scroll_view);
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scroll_bar_set_params(bar_h, sv->virtual_w, 10);
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scroll_bar_set_params(bar_v, sv->virtual_h, 10);
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return RET_OK;
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}
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ret_t application_init() {
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widget_t* win = window_open("scroll_view");
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widget_foreach(win, install_one, win);
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idle_add(on_idle_scroll_view_set_virtual_wh, win);
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return RET_OK;
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}
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ret_t application_exit() {
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return RET_OK;
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}
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#ifdef WITH_FS_RES
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#define APP_DEFAULT_FONT "default_full"
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#endif /*WITH_FS_RES*/
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#include "awtk_main.inc"
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