implement number input

main/scenes/scene_car.c

@@ -1,8 +1,9 @@
-#include "scenes.h"
-#include "liquid.h"
 #include <malloc.h>
+#include <inttypes.h>
 #include "graphics/nokia.h"
 #include "graphics/drawing.h"
+#include "scenes.h"
+#include "liquid.h"
 
 struct CarScene {
     struct Scene base;

main/scenes/scene_menu.c

@@ -55,11 +55,18 @@ static struct SceneEvent onInput(struct MenuScene *self, struct InputEvent event
     }
 }
 
+static void deinit(struct MenuScene *self)
+{
+    free(self->items);
+    self->items = NULL;
+}
+
 struct MenuScene *NewScene_Menu(struct MenuItem *items, size_t items_len) {
     struct MenuScene *scene = calloc(1, sizeof(struct MenuScene));
 
     scene->base.paint = (Scene_paint_t) paint;
     scene->base.onInput = (Scene_onInput_t) onInput;
+    scene->base.deinit = (Scene_deinit_t) deinit;
 
     scene->items = items;
     scene->items_len = items_len;

main/scenes/scene_menu.h

@@ -7,6 +7,9 @@
 #ifndef REFLOWER_SCENE_MENU_H
 #define REFLOWER_SCENE_MENU_H
 
+#include <stdint.h>
+#include <stddef.h>
+
 #define MENUITEM_LABEL_LEN 30
 
 struct MenuItem {
@@ -30,6 +33,8 @@ struct MenuScene {
     int32_t selected;
     // selection handler
     MenuScene_onSelect_t onSelect;
+    // Extra field for the instance's private use.
+    void *private;
 };
 
 struct MenuScene *NewScene_Menu(struct MenuItem *items, size_t items_len);

main/scenes/scene_number.c

@@ -0,0 +1,66 @@
+#include "scenes.h"
+#include "liquid.h"
+#include <malloc.h>
+#include <stdio.h>
+#include "graphics/nokia.h"
+#include "graphics/drawing.h"
+#include "scene_number.h"
+
+struct NumberScene {
+    struct Scene base;
+    struct NumberSceneOpts *opts;
+};
+
+static struct SceneEvent onInput(struct NumberScene *self, struct InputEvent event) {
+    struct NumberSceneOpts *opts = self->opts;
+    switch (event.kind) {
+        case InputEventKind_Wheel:
+            opts->value += event.wheel.delta;
+
+            if (opts->value < opts->min) {
+                opts->value = opts->min;
+            }
+            else if (opts->value > opts->max) {
+                opts->value = opts->max;
+            }
+
+            return SceneEvent_Repaint();
+
+        case InputEventKind_Button:
+            if (event.button.state) {
+                return SceneEvent_Close(opts->value, NULL);
+            }
+            // fall through
+        default:
+            return SceneEvent_None();
+    }
+}
+
+static void paint(struct NumberScene *self)
+{
+    struct NumberSceneOpts *opts = self->opts;
+
+    LCD_clearDisplay(0);
+    LCD_setStrEx(opts->label, 1, 1, BLACK, FONT_BOLD);
+
+    char buf[10];
+    snprintf(buf, 10, "%d%s", opts->value, opts->unit);
+    LCD_setStrEx(buf, 1, 9, BLACK, FONT_DOUBLE);
+}
+
+static void deinit(struct NumberScene *self)
+{
+    free(self->opts);
+    self->opts = NULL;
+}
+
+struct Scene *NewScene_Number(struct NumberSceneOpts *opts) {
+    struct NumberScene *scene = calloc(1, sizeof(struct NumberScene));
+    if (!scene) return NULL;
+
+    scene->opts = opts;
+    scene->base.onInput = (Scene_onInput_t) onInput;
+    scene->base.paint = (Scene_paint_t) paint;
+    scene->base.deinit = (Scene_deinit_t) deinit;
+    return (struct Scene *) scene;
+}

main/scenes/scene_number.h

@@ -0,0 +1,32 @@
+/**
+ * TODO file description
+ * 
+ * Created on 2020/01/05.
+ */
+
+#ifndef REFLOWER_SCENE_NUMBER_H
+#define REFLOWER_SCENE_NUMBER_H
+
+#include <stdint.h>
+
+struct NumberSceneOpts {
+    char label[15];
+    char unit[8];
+    int32_t value;
+    int32_t min;
+    int32_t max;
+};
+
+/**
+ * Create number picker.
+ *
+ * The result is passed back as status.
+ *
+ * "opts" must be on heap and will be internally mutated.
+ *
+ * @param opts
+ * @return
+ */
+struct Scene *NewScene_Number(struct NumberSceneOpts *opts);
+
+#endif //REFLOWER_SCENE_NUMBER_H

main/scenes/scene_root.c

@@ -21,7 +21,7 @@ static struct SceneEvent init(struct RootScene *self)
     return SceneEvent_OpenChild(NewScene_Boot(), 1);
 }
 
-struct SceneEvent onChildReturn(struct RootScene *self, uint32_t tag, int32_t status, void *data)
+static struct SceneEvent onChildReturn(struct RootScene *self, uint32_t tag, int32_t status, void *data)
 {
     if (tag == 1) {
         return SceneEvent_OpenChild(NewScene_MenuTest(), 0);

main/scenes/scene_test_menu.c

@@ -10,8 +10,14 @@
 #include "scenes.h"
 #include "scene_menu.h"
 
+struct Priv {
+    int32_t number;
+    Scene_deinit_t parent_deinit;
+};
 
 static struct SceneEvent onSelect(struct MenuScene *self) {
+    struct Priv *priv = self->private;
+
     if (self->selected == 0) {
         return SceneEvent_Close(0, NULL);
     }
@@ -22,24 +28,55 @@ static struct SceneEvent onSelect(struct MenuScene *self) {
     if (self->selected == 9) {
         return SceneEvent_OpenChild(NewScene_Demo(), 0);
     }
+    if (self->selected == 2) {
+        struct NumberSceneOpts *opts = calloc(1, sizeof(struct NumberSceneOpts));
+        strcpy(opts->unit, "°C");
+        strcpy(opts->label, "Setpoint");
+        opts->value = priv->number;
+        opts->min = 0;
+        opts->max = 350;
+        return SceneEvent_OpenChild(NewScene_Number(opts), 99);
+    }
     if (self->selected == 5) {
         self->items[5].tag++;
-        snprintf(self->items[5].label, MENUITEM_LABEL_LEN, "Count = %d", self->items[5].tag);
+        snprintf(self->items[5].label, MENUITEM_LABEL_LEN, "Clicked %dx", self->items[5].tag);
         return SceneEvent_Repaint();
     }
 
     return SceneEvent_None();
 }
 
+static void deinit(struct MenuScene *self)
+{
+    struct Priv *priv = self->private;
+    if (priv->parent_deinit) {
+        priv->parent_deinit((struct Scene *) self);
+    }
+    free(self->private);
+    self->private = NULL;
+}
+
+static struct SceneEvent onChildReturn(struct MenuScene *self, uint32_t tag, int32_t status, void *data)
+{
+    struct Priv *priv = self->private;
+    if (tag == 99) {
+        priv->number = status;
+        snprintf(self->items[2].label, MENUITEM_LABEL_LEN, "Set=%d°C", priv->number);
+    }
+
+    // this should be unreachable
+    return SceneEvent_None();
+}
+
 struct Scene *NewScene_MenuTest() {
     struct MenuItem *items = calloc(10, sizeof(struct MenuItem));
 
     strncpy(items[0].label, "🔙Back", MENUITEM_LABEL_LEN);
     strncpy(items[1].label, "▶#1", MENUITEM_LABEL_LEN);
-    strncpy(items[2].label, "▶#2", MENUITEM_LABEL_LEN);
+    strncpy(items[2].label, "Set=0°C", MENUITEM_LABEL_LEN);
     strncpy(items[3].label, "▶#3", MENUITEM_LABEL_LEN);
     strncpy(items[4].label, "▶#4", MENUITEM_LABEL_LEN);
-    strncpy(items[5].label, "Count = 0", MENUITEM_LABEL_LEN);
+    strncpy(items[5].label, "Clicked 0x", MENUITEM_LABEL_LEN);
     strncpy(items[6].label, "▶#6", MENUITEM_LABEL_LEN);
     strncpy(items[7].label, "▶#7", MENUITEM_LABEL_LEN);
     strncpy(items[8].label, "Car", MENUITEM_LABEL_LEN);
@@ -48,5 +85,14 @@ struct Scene *NewScene_MenuTest() {
     struct MenuScene * scene = NewScene_Menu(items, 10);
     scene->onSelect = onSelect;
 
+    // private data added by the subclass
+    struct Priv *priv = calloc(1, sizeof(struct Priv));
+    priv->number = 0;
+    priv->parent_deinit = scene->base.deinit;
+    scene->private = priv;
+
+    scene->base.deinit = (Scene_deinit_t) deinit;
+    scene->base.onChildReturn = (Scene_onChildReturn_t) onChildReturn;
+
     return (struct Scene *) scene;
 }

main/scenes/scenes.h

@@ -7,11 +7,15 @@
 #ifndef REFLOWER_SCENES_H
 #define REFLOWER_SCENES_H
 
+#include "scene_type.h"
+
 struct Scene *NewScene_Root(void);
 struct Scene *NewScene_Boot(void);
 struct Scene *NewScene_Demo(void);
 struct Scene *NewScene_Car(void);
-
 struct Scene *NewScene_MenuTest(void);
 
+#include "scene_menu.h"
+#include "scene_number.h"
+
 #endif //REFLOWER_SCENES_H