1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135

// Pushrod Widgets
// Popup Menu Widget
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use sdl2::render::{Canvas, Texture};
use sdl2::video::Window;

use crate::caches::TextureCache;
use crate::primitives::draw_base;
use crate::properties::{WidgetProperties, PROPERTY_BORDER_COLOR, PROPERTY_BORDER_WIDTH, PROPERTY_FONT_NAME, PROPERTY_FONT_SIZE, PROPERTY_FONT_STYLE, PROPERTY_MAIN_COLOR, PROPERTY_MENU_ITEM_ID, PROPERTY_TEXT, PROPERTY_HIDDEN};
use crate::system_widgets::base_widget::BaseWidget;
use crate::system_widgets::menu_item_widget::MenuItemWidget;
use crate::texture_store::TextureStore;
use crate::widget::Widget;
use sdl2::pixels::Color;

/// Base Widget.
#[derive(Default)]
pub struct PopupMenuWidget {
    texture_store: TextureStore,
    properties: WidgetProperties,
    menu_child_ids: Vec<u32>,
    layout_built: bool,
}

/// Implementation for drawing a `PopupMenuWidget`, with the `Widget` trait objects applied.
impl Widget for PopupMenuWidget {
    widget_default_impl!("PopupMenuWidget");

    /// This is a `PopupMenuWidget` that is used as a standard blank `Widget`.
    ///
    /// - PROPERTY_MAIN_COLOR: the `Color` of the body of the `Widget`
    /// - PROPERTY_BORDER_WIDTH: the width of the border to draw
    /// - PROPERTY_BORDER_COLOR: the `Color` of the border.
    fn draw(&mut self, c: &mut Canvas<Window>, _t: &mut TextureCache) -> Option<&Texture> {
        // ONLY update the texture if the `BaseWidget` shows that it's been invalidated.
        if self.invalidated() {
            let bounds = self.properties.get_bounds();

            self.texture_store
                .create_or_resize_texture(c, bounds.0, bounds.1);

            let cloned_properties = self.properties.clone();

            c.with_texture_canvas(self.texture_store.get_mut_ref(), |texture| {
                draw_base(texture, &cloned_properties, None)
            })
            .unwrap();
        }

        self.texture_store.get_optional_ref()
    }

    /// This function builds the menu of items that will be displayed inside the `PopupMenuWidget`.
    /// They include single element `PopupMenuItemWidget` objects based on their IDs.  Once an ID
    /// is clicked, the engine generates a `WidgetMenuItemSelected` event.
    fn build_layout(&mut self) -> Vec<Box<dyn Widget>> {
        if !self.layout_built {
            let mut return_vec: Vec<Box<dyn Widget>> = vec![];
            let origin = self.properties.get_origin();
            let origin_x = origin.0 + 1;
            let mut origin_y = origin.1 + 1;
            let mut menu_item = 1;

            for line in self
                .properties()
                .get(PROPERTY_TEXT)
                .lines()
                .collect::<Vec<&str>>()
            {
                let mut menu_item_widget = MenuItemWidget::default();

                menu_item_widget
                    .properties()
                    .set_origin(origin_x, origin_y)
                    .set_bounds(140, 20)
                    .set_color(PROPERTY_MAIN_COLOR, Color::WHITE)
                    .set(
                        PROPERTY_FONT_NAME,
                        String::from("assets/OpenSans-Regular.ttf"),
                    )
                    .set_value(PROPERTY_FONT_SIZE, 14)
                    .set_value(PROPERTY_FONT_STYLE, sdl2::ttf::FontStyle::NORMAL.bits())
                    .set_value(PROPERTY_MENU_ITEM_ID, menu_item)
                    .set_bool(PROPERTY_HIDDEN)
                    .set(PROPERTY_TEXT, String::from(line));

                return_vec.push(Box::new(menu_item_widget));

                origin_y += 20;
                menu_item += 1;
            }

            let mut base_widget = BaseWidget::default();

            base_widget
                .properties()
                .set_origin(origin.0, origin.1)
                .set_bounds(142, (menu_item * 20) as u32 - 18)
                .set_value(PROPERTY_BORDER_WIDTH, 1)
                .set_color(PROPERTY_BORDER_COLOR, Color::BLACK)
                .set_color(PROPERTY_MAIN_COLOR, Color::WHITE)
                .set_bool(PROPERTY_HIDDEN);

            return_vec.insert(0, Box::new(base_widget));

            eprintln!("Building layout: {} items", return_vec.len());

            self.layout_built = true;

            return_vec
        } else {
            vec![]
        }
    }

    /// After a `build_layout` call has been completed, the list of IDs that were added to the display
    /// list are returned in the same order in from `build_layout`.  The `Widget` that created
    /// these IDs should then store them here in an array, so that they can be referenced when
    /// interacted with.
    fn constructed_layout_ids(&mut self, ids: Vec<u32>) {
        self.menu_child_ids = ids;
    }
}