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Add the initial version of the water level widget

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Gergely Polonkai 2018-07-27 18:32:37 +02:00
parent 10cbb64f9a
commit 1ca33bdd9d
4 changed files with 206 additions and 35 deletions
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38
data/gwr-window.ui
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@ -1,19 +1,37 @@
<?xml version="1.0" encoding="UTF-8"?> <?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.22.0 -->
<interface> <interface>
<requires lib="gtk+" version="3.10"/>
<template class="GwrWindow" parent="GtkApplicationWindow"> <template class="GwrWindow" parent="GtkApplicationWindow">
<property name="default-width">600</property> <property name="can_focus">False</property>
<property name="default-height">300</property> <property name="default_width">600</property>
<child type="titlebar"> <property name="default_height">300</property>
<object class="GtkHeaderBar" id="header_bar">
<property name="visible">True</property>
<property name="show-close-button">True</property>
<property name="title">Water Reminder</property>
</object>
</child>
<child> <child>
<object class="GwrWaterLevel" id="level"> <object class="GwrWaterLevel" id="level">
<property name="visible">True</property> <property name="visible">True</property>
</object> </object>
</child> </child>
<child type="titlebar">
<object class="GtkHeaderBar" id="header_bar">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="title">Water Reminder</property>
<property name="show_close_button">True</property>
<child>
<object class="GtkButton">
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="receives_default">True</property>
<child>
<object class="GtkImage">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="icon_name">list-add-symbolic</property>
</object>
</child>
</object>
</child>
</object>
</child>
</template> </template>
</interface> </interface>

197
src/gwr-water-level.c
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@ -1,60 +1,207 @@
#include "gwr-water-level.h" #include "gwr-water-level.h"
struct _GwrWaterLevel { struct _GwrWaterLevel {
GtkWidget parent_instance; GtkWidget parent_instance;
gfloat level;
}; };
/**
* GwrWaterLevel:
*
* A widget displaying a glass filled with water.
*/
G_DEFINE_TYPE(GwrWaterLevel, gwr_water_level, GTK_TYPE_WIDGET) G_DEFINE_TYPE(GwrWaterLevel, gwr_water_level, GTK_TYPE_WIDGET)
enum {
PROP_0,
PROP_LEVEL,
N_PROPS
};
static GParamSpec *props[N_PROPS] = { NULL, };
/**
* gwr_water_level_set_level:
* @self: a #GwrWaterLevel object
* @level: the level to set
*
* Set the water level for this object.
*/
void
gwr_water_level_set_level(GwrWaterLevel *self,
gfloat level)
{
self->level = MAX(0, MIN(level, 1.0));
g_object_notify_by_pspec(G_OBJECT(self), props[PROP_LEVEL]);
}
/**
* gwr_water_level_get_level:
* @self: a #GwrWaterLevel object
*
* @returns: the current water level
*/
gfloat
gwr_water_level_get_level(GwrWaterLevel *self)
{
return self->level;
}
static gboolean static gboolean
gwr_water_level_draw(GtkWidget *widget, cairo_t *cr) gwr_water_level_draw(GtkWidget *widget, cairo_t *cr)
{ {
GtkStyleContext *context = gtk_widget_get_style_context(widget); GwrWaterLevel *self = GWR_WATER_LEVEL(widget);
gint width = gtk_widget_get_allocated_width(widget); GtkStyleContext *context = gtk_widget_get_style_context(widget);
gint height = gtk_widget_get_allocated_height(widget); gint width = gtk_widget_get_allocated_width(widget);
GdkRGBA color; gint height = gtk_widget_get_allocated_height(widget);
GdkRGBA color;
gint left, right;
gtk_render_background(context, cr, 0, 0, width, height); gtk_render_background(context, cr, 0, 0, width, height);
gtk_render_frame(context, cr, 0, 0, width, height); gtk_render_frame(context, cr, 0, 0, width, height);
cairo_arc(cr, width / 2.0, height / 2.0, MIN(width, height) / 2.0, 0, 2 * G_PI); left = right = width / 2.0;
gtk_style_context_get_color(context, gtk_style_context_get_state(context), &color); left -= 3.0 * height / 8.0;
gdk_cairo_set_source_rgba(cr, &color); right += 3.0 * height / 8.0;
gdk_cairo_set_source_rgba(cr, &color); width = right - left;
cairo_fill (cr);
return FALSE; cairo_save(cr);
gint top_left_x = left + (width * 0.1);
gint top_y = width * 0.1;
gint top_right_x = right - (width * 0.1);
gint bottom_right_x = right - (width * 0.2);
gint bottom_y = height - (width * 0.1);
gint bottom_left_x = left + (width * 0.2);
float level_y = top_y + (bottom_y - top_y) * (1.0 - self->level);
cairo_move_to(cr, top_left_x, top_y);
cairo_line_to(cr, top_right_x, top_y);
cairo_line_to(cr, bottom_right_x, bottom_y);
cairo_line_to(cr, bottom_left_x, bottom_y);
cairo_close_path(cr);
cairo_stroke(cr);
cairo_move_to(cr, bottom_right_x, bottom_y);
cairo_line_to(cr, bottom_left_x, bottom_y);
cairo_line_to(cr, bottom_left_x - ((top_right_x - bottom_right_x) * self->level), level_y);
cairo_line_to(cr, bottom_right_x + ((top_right_x - bottom_right_x) * self->level), level_y);
cairo_close_path(cr);
cairo_restore(cr);
gtk_style_context_get_color(context, gtk_style_context_get_state(context), &color);
gdk_cairo_set_source_rgba(cr, &color);
cairo_fill (cr);
return FALSE;
} }
static void static void
gwr_water_level_finalize(GObject *gobject) gwr_water_level_finalize(GObject *gobject)
{ {
// Here, you free memory that is associated with your instance. // Here, you free memory that is associated with your instance.
// //
// References to other objects should be freed in dispose instead. // References to other objects should be freed in dispose instead.
G_OBJECT_CLASS(gwr_water_level_parent_class)->finalize(gobject); G_OBJECT_CLASS(gwr_water_level_parent_class)->finalize(gobject);
} }
static void static void
gwr_water_level_destroy(GtkWidget *widget) gwr_water_level_destroy(GtkWidget *widget)
{ {
// Here you drop references to other objects. // Here you drop references to other objects.
GTK_WIDGET_CLASS(gwr_water_level_parent_class)->destroy(widget); GTK_WIDGET_CLASS(gwr_water_level_parent_class)->destroy(widget);
}
static void
gwr_water_level_get_preferred_height(GtkWidget *widget, gint *minimum_height, gint *natural_height)
{
if (minimum_height != NULL) {
*minimum_height = 200;
}
if (natural_height != NULL) {
*natural_height = 400;
}
}
static void
gwr_water_level_get_preferred_width(GtkWidget *widget, gint *minimum_width, gint *natural_width)
{
if (minimum_width != NULL) {
*minimum_width = 100;
}
if (natural_width != NULL) {
*natural_width = 200;
}
}
static void
gwr_water_level_set_property(GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
switch (prop_id) {
case PROP_LEVEL:
gwr_water_level_set_level(GWR_WATER_LEVEL(gobject), g_value_get_float(value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(gobject, prop_id, pspec);
break;
}
}
static void
gwr_water_level_get_property(GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
switch (prop_id) {
case PROP_LEVEL:
g_value_set_float(value, gwr_water_level_get_level(GWR_WATER_LEVEL(gobject)));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(gobject, prop_id, pspec);
break;
}
} }
static void static void
gwr_water_level_class_init(GwrWaterLevelClass *klass) gwr_water_level_class_init(GwrWaterLevelClass *klass)
{ {
GObjectClass *gobject_class = G_OBJECT_CLASS(klass); GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(klass); GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(klass);
gobject_class->finalize = gwr_water_level_finalize; gobject_class->set_property = gwr_water_level_set_property;
widget_class->destroy = gwr_water_level_destroy; gobject_class->get_property = gwr_water_level_get_property;
widget_class->draw = gwr_water_level_draw; gobject_class->finalize = gwr_water_level_finalize;
widget_class->destroy = gwr_water_level_destroy;
widget_class->get_preferred_width = gwr_water_level_get_preferred_width;
widget_class->get_preferred_height = gwr_water_level_get_preferred_height;
widget_class->draw = gwr_water_level_draw;
props[PROP_LEVEL] = g_param_spec_float(
"level", "level", "The current water level",
0.0, 1.0, 0.0,
G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE);
g_object_class_install_properties(gobject_class, N_PROPS, props);
} }
static void static void
gwr_water_level_init(GwrWaterLevel *self) gwr_water_level_init(GwrWaterLevel *self)
{} {
self->level = 0.0;
gtk_widget_set_has_window(GTK_WIDGET(self), FALSE);
}

4
src/gwr-water-level.h
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@ -8,6 +8,10 @@ G_BEGIN_DECLS
# define GWR_TYPE_WATER_LEVEL (gwr_water_level_get_type()) # define GWR_TYPE_WATER_LEVEL (gwr_water_level_get_type())
G_DECLARE_FINAL_TYPE(GwrWaterLevel, gwr_water_level, GWR, WATER_LEVEL, GtkWidget) G_DECLARE_FINAL_TYPE(GwrWaterLevel, gwr_water_level, GWR, WATER_LEVEL, GtkWidget)
void gwr_water_level_set_level(GwrWaterLevel *water_level,
gfloat level);
gfloat gwr_water_level_get_level(GwrWaterLevel *water_level);
G_END_DECLS G_END_DECLS
#endif /* __GWR_WATER_LEVEL_H__ */ #endif /* __GWR_WATER_LEVEL_H__ */

2
src/gwr-window.c
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@ -44,5 +44,7 @@ gwr_window_class_init (GwrWindowClass *klass)
static void static void
gwr_window_init (GwrWindow *self) gwr_window_init (GwrWindow *self)
{ {
g_type_ensure(GWR_TYPE_WATER_LEVEL);
gtk_widget_init_template (GTK_WIDGET (self)); gtk_widget_init_template (GTK_WIDGET (self));
} }