Abstract table class

Changed files (1)

• added libbirdfont/Table.vala

Diff

diff --git a/libbirdfont/Table.vala b/libbirdfont/Table.valanew file mode 100644index 0000000..985f3bc--- /dev/null+++ b/libbirdfont/Table.vala@@ -0,0 +1,194 @@+/*+    Copyright (C) 2014 Johan Mattsson++    This library is free software; you can redistribute it and/or modify +    it under the terms of the GNU Lesser General Public License as +    published by the Free Software Foundation; either version 3 of the +    License, or (at your option) any later version.++    This library is distributed in the hope that it will be useful, but +    WITHOUT ANY WARRANTY; without even the implied warranty of +    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +    Lesser General Public License for more details.+*/++using Cairo;+using Math;++namespace BirdFont {++/** Table functions. */+public abstract class Table : FontDisplay {++	int scroll = 0;+	int visible_rows = 0;+	WidgetAllocation allocation = new WidgetAllocation ();++	public abstract void update_rows ();+	public abstract Gee.ArrayList<Row> get_rows ();+	public abstract void selected_row (Row row, int column, bool delete_button);++	public override void draw (WidgetAllocation allocation, Context cr) {+		double y = 20 * MainWindow.units;+		int s = 0;+		bool color = (scroll + 1 % 2) == 0;+		+		if (allocation.width != this.allocation.width+				|| allocation.height != this.allocation.height) {+			this.allocation = allocation;+			update_rows ();+			update_scrollbar ();+		}+		+		visible_rows = (int) (allocation.height / 18.0);+		+		cr.save ();+		cr.set_source_rgba (1, 1, 1, 1);+		cr.rectangle (0, 0, allocation.width, allocation.height);+		cr.fill ();+		cr.restore ();+		+		cr.save ();+		cr.set_source_rgba (0.3, 0.3, 0.3, 1);+		cr.set_font_size (12);++		foreach (Row r in get_rows ()) {+			if (s++ >= scroll) {+				draw_row (allocation, cr, r, y, color, true);+				y += 18 * MainWindow.units;+				color = !color;+			}+		}+		+		cr.restore ();+	}	++	private static void draw_row (WidgetAllocation allocation, Context cr,+			Row row, double y, bool color, bool dark) {+		+		double margin;+	+		if (color) {+			cr.save ();+			cr.set_source_rgba (224/255.0, 224/255.0, 224/255.0, 1);+			cr.rectangle (0, y - 14 * MainWindow.units, allocation.width, 18 * MainWindow.units);+			cr.fill ();+			cr.restore ();+		}++		if (row.has_delete_button ()) {+			cr.save ();+			cr.set_line_width (1);+			cr.move_to (10 * MainWindow.units, y - 8 * MainWindow.units);+			cr.line_to (15 * MainWindow.units, y - 3 * MainWindow.units);+			cr.move_to (10 * MainWindow.units, y - 3 * MainWindow.units);+			cr.line_to (15 * MainWindow.units, y - 8 * MainWindow.units);		+			cr.stroke ();+			cr.restore ();+		}+		+		for (int i = 0; i < row.columns; i++) {+			cr.save ();+			margin = (row.has_delete_button ()) ? 120 * MainWindow.units : 3* MainWindow.units;+			cr.move_to (margin + i * 120 * MainWindow.units, y);+			cr.set_font_size (12 * MainWindow.units);+			cr.show_text (row.get_column (i));+			cr.restore ();+		}+	}++	public override void button_release (int button, double ex, double ey) {+		int s = 0;+		double y = 0;+		int colum = -1;+		Row? selected = null;+		bool over_delete = false;++		foreach (Row r in get_rows ()) {+			if (s++ >= scroll) {+				y += 18 * MainWindow.units;+				+				if (y - 10 * MainWindow.units <= ey * MainWindow.units <= y + 5 * MainWindow.units) {+					+					if (r.has_delete_button ()) {+						colum = (int) ((ex - 120) / 120 * MainWindow.units);+					} else {+						colum = (int) ((ex) / 120 * MainWindow.units);+					}+					+					over_delete = (ex < 18 && r.has_delete_button ());+					selected = r;+					break;+				}+			}+		}+		+		if (selected != null) {+			selected_row ((!) selected, colum, over_delete);	+		}+		+		update_scrollbar ();+		redraw_area (0, 0, allocation.width, allocation.height);+	}++	public override bool has_scrollbar () {+		return true;+	}+	+	public override void scroll_wheel_down (double x, double y) {+		int nrows = get_rows ().size;+		scroll += 3;++		if (scroll > nrows - visible_rows) {+			scroll = (int) (nrows - visible_rows);+		}+		+		if (visible_rows > nrows) {+			scroll = 0;+		} +		+		update_scrollbar ();+		redraw_area (0, 0, allocation.width, allocation.height);+	}+	+	public override void scroll_wheel_up (double x, double y) {+		scroll -= 3;+		+		if (scroll < 0) {+			scroll = 0;+		}+		+		update_scrollbar ();+		redraw_area (0, 0, allocation.width, allocation.height);+	}+	+	public void update_scrollbar () {+		uint rows = get_rows ().size;++		if (rows == 0 || visible_rows == 0) {+			MainWindow.set_scrollbar_size (0);+			MainWindow.set_scrollbar_position (0);+		} else {+			MainWindow.set_scrollbar_size ((double) visible_rows / rows);+			MainWindow.set_scrollbar_position ((double) scroll /  rows);+		}+	}++	public override void scroll_to (double percent) {+		uint rows = get_rows ().size;+		scroll = (int) (percent * rows);+		+		if (scroll > rows - visible_rows) {+			scroll = (int) (rows - visible_rows);+		}+		+		redraw_area (0, 0, allocation.width, allocation.height);+	}++	public override void selected_canvas () {+		update_rows ();+		update_scrollbar ();+	}+}++}