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Fix drawing of the grid.

This commit is contained in:
Přemysl Eric Janouch 2011-02-01 17:21:08 +01:00
parent a967a2c3b8
commit 539f537846
1 changed files with 12 additions and 1 deletions
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13
liblogdiag/ld-canvas.c
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@ -1339,12 +1339,17 @@ static void
draw_grid (GtkWidget *widget, DrawData *data) draw_grid (GtkWidget *widget, DrawData *data)
{ {
gdouble grid_step; gdouble grid_step;
gint grid_factor;
gdouble x_init, y_init; gdouble x_init, y_init;
gdouble x, y; gdouble x, y;
grid_step = data->scale; grid_step = data->scale;
grid_factor = 1;
while (grid_step < 5) while (grid_step < 5)
{
grid_step *= 5; grid_step *= 5;
grid_factor *= 5;
}
ld_canvas_color_apply (COLOR_GET (data->self, COLOR_GRID), data->cr); ld_canvas_color_apply (COLOR_GET (data->self, COLOR_GRID), data->cr);
cairo_set_line_width (data->cr, 1); cairo_set_line_width (data->cr, 1);
@ -1353,8 +1358,14 @@ draw_grid (GtkWidget *widget, DrawData *data)
/* Get coordinates of the top-left point. */ /* Get coordinates of the top-left point. */
ld_canvas_widget_to_diagram_coords (data->self, ld_canvas_widget_to_diagram_coords (data->self,
data->exposed_rect.x, data->exposed_rect.y, &x_init, &y_init); data->exposed_rect.x, data->exposed_rect.y, &x_init, &y_init);
x_init = ceil (x_init);
x_init = x_init - (gint) x_init % grid_factor;
y_init = ceil (y_init);
y_init = y_init - (gint) y_init % grid_factor;
ld_canvas_diagram_to_widget_coords (data->self, ld_canvas_diagram_to_widget_coords (data->self,
ceil (x_init), ceil (y_init), &x_init, &y_init); x_init, y_init, &x_init, &y_init);
/* Iterate over all the points. */ /* Iterate over all the points. */
for (x = x_init; x <= data->exposed_rect.x + data->exposed_rect.width; for (x = x_init; x <= data->exposed_rect.x + data->exposed_rect.width;