improved event visualization

* margin between bars
* fix min row height computation

Signed-off-by: Fabrizio Iannetti <fabrizio.iannetti@gmail.com>

src/ui/basics.rs

@@ -26,7 +26,7 @@ pub struct CellGrid {
     num_y: u32,
 }
 
-pub struct CellGridCells<'a> {
+pub struct CellGridIterator<'a> {
     grid: &'a CellGrid,
 
     // current position when iterating
@@ -49,8 +49,8 @@ impl CellGrid {
         }
     }
 
-    pub fn iter(&self) -> CellGridCells {
-        CellGridCells {
+    pub fn iter(&self) -> CellGridIterator {
+        CellGridIterator {
             grid: self,
             pos_x: 0,
             pos_y: 0,
@@ -78,7 +78,7 @@ impl CellGrid {
     }
 }
 
-impl<'a> CellGridCells<'a> {
+impl<'a> CellGridIterator<'a> {
     fn compute_cell(&mut self) -> () {
         let grid: &'a CellGrid = self.grid;
         self.curr.pos_x = self.pos_x;
@@ -96,7 +96,7 @@ impl<'a> CellGridCells<'a> {
     }
 }
 
-impl<'a> Iterator for CellGridCells<'a> {
+impl<'a> Iterator for CellGridIterator<'a> {
     type Item = Cell;
 
     fn next(&mut self) -> Option<Self::Item> {

src/ui/calendar.rs

@@ -46,6 +46,7 @@ pub struct CalendarParams {
     day_text_margin: f32,
 
     ev_height: f32,
+    ev_margin: f32,
     ev_bg: Color,
     ev_fontsize: f32,
 }
@@ -62,6 +63,7 @@ impl CalendarParams {
             day_weekend_bg: Color::from_rgb8(245, 245, 245),
             day_text_margin: 5.0,
             ev_height: 20.0,
+            ev_margin: 2.0,
             ev_bg: Color::from_rgb8(200, 245, 200),
             ev_fontsize: 16.0,
         }
@@ -76,6 +78,7 @@ fn render_events_in_row(
     first_day: NaiveDate,
     num_days: i64,
     row_bounds: Rectangle,
+    min_row_height: f32,
     font_size: Pixels,
     fg: Color,
     content: &str,
@@ -110,6 +113,7 @@ fn render_events_in_row(
     let x = row_bounds.x;
     let y = row_bounds.y + params.day_text_margin + day_text_height;
     let ev_height = params.ev_height;
+    let ev_margin = params.ev_margin;
 
     let mut ev_y: f32 = 0.0;
 
@@ -119,7 +123,7 @@ fn render_events_in_row(
             ev: e,
             bounds: Rectangle {
                 x,
-                y,
+                y: y,
                 width: 0.0,
                 height: ev_height,
             },
@@ -138,11 +142,6 @@ fn render_events_in_row(
 
     let mut current_day = first_day;
 
-    // use the minimum row height to compute available space for event bars
-    // to avoid inconsistentencies when rowas have slightly different heights
-    // and some can fit more event bars than others
-    let min_row_height = row_grid.compute_min_height();
-
     // update event bars
     for cell in row_grid.iter() {
         ev_y = y;
@@ -152,14 +151,14 @@ fn render_events_in_row(
             {
                 // start of event
                 ev_bar.bounds.x = cell.x;
-                ev_bar.bounds.y = ev_y;
+                ev_bar.bounds.y = ev_y + ev_margin;
             }
             if ev_bar.ev.end == current_day {
                 // end of event -> set width
                 ev_bar.bounds.width = cell.x + cell.width - ev_bar.bounds.x;
             }
             if ev_bar.ev.is_in_day(current_day) {
-                ev_y += ev_height;
+                ev_y += ev_height + 2.0 * ev_margin;
             }
         }
         current_day = current_day.succ_opt().unwrap();
@@ -366,7 +365,11 @@ impl<'a> CalendarMonthView<'a> {
         let mut current_day = self.first_day_in_view;
 
         let grid = CellGrid::new(bounds.x, bounds.y, bounds.width, bounds.height, 7, 6);
-        let min_row_height = grid.compute_min_height();
+	    // use the minimum row height to compute available space for event bars
+	    // to avoid inconsistentencies when rowas have slightly different heights
+	    // and some can fit more event bars than others
+	    let min_row_height = grid.compute_min_height();
+
         for row in grid.rows().iter() {
             let row_first_day = current_day;
             let row_grid = CellGrid::new(row.x, row.y, row.width, row.height, 7, 1);
@@ -443,6 +446,7 @@ impl<'a> CalendarMonthView<'a> {
                 row_first_day,
                 6,
                 row_bounds,
+                min_row_height,
                 font_size,
                 self.params.day_fg,
                 content,
@@ -732,6 +736,11 @@ impl<'a> CalendarYearView<'a> {
             12,
         );
 
+	    // use the minimum row height to compute available space for event bars
+	    // to avoid inconsistentencies when rowas have slightly different heights
+	    // and some can fit more event bars than others
+	    let min_row_height = grid.compute_min_height();
+
         for row in grid.rows().iter() {
             let row_grid = CellGrid::new(
                 row.x,
@@ -829,6 +838,7 @@ impl<'a> CalendarYearView<'a> {
                 first_day_of_month,
                 row_days as i64,
                 row_bounds,
+                min_row_height,
                 font_size,
                 self.params.day_fg,
                 content,