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Diffstat (limited to 'src/gui/piePreview.vala')
| -rw-r--r-- | src/gui/piePreview.vala | 369 |
1 files changed, 369 insertions, 0 deletions
diff --git a/src/gui/piePreview.vala b/src/gui/piePreview.vala new file mode 100644 index 0000000..5745fcb --- /dev/null +++ b/src/gui/piePreview.vala @@ -0,0 +1,369 @@ +/* +Copyright (c) 2011 by Simon Schneegans + +This program is free software: you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the Free +Software Foundation, either version 3 of the License, or (at your option) +any later version. + +This program 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 General Public License for +more details. + +You should have received a copy of the GNU General Public License along with +this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +namespace GnomePie { + +///////////////////////////////////////////////////////////////////////// +/// A custom widget displaying the preview of a Pie. It can be used to +/// configure the displayed Pie in various aspects. +///////////////////////////////////////////////////////////////////////// + +class PiePreview : Gtk.DrawingArea { + + ///////////////////////////////////////////////////////////////////// + /// These get called when the last Slice is removed and when the + /// first Slice is added respectively. + ///////////////////////////////////////////////////////////////////// + + public signal void on_last_slice_removed(); + public signal void on_first_slice_added(); + + ///////////////////////////////////////////////////////////////////// + /// The internally used renderer to draw the Pie. + ///////////////////////////////////////////////////////////////////// + + private PiePreviewRenderer renderer = null; + + ///////////////////////////////////////////////////////////////////// + /// The window which pops up, when a Slice is added or edited. + ///////////////////////////////////////////////////////////////////// + + private NewSliceWindow? new_slice_window = null; + + ///////////////////////////////////////////////////////////////////// + /// A timer used for calculating the frame time. + ///////////////////////////////////////////////////////////////////// + + private GLib.Timer timer; + + ///////////////////////////////////////////////////////////////////// + /// True, when it is possible to drag a slice from this widget. + /// False, when the user currently hovers over the add sign. + ///////////////////////////////////////////////////////////////////// + + private bool drag_enabled = false; + + ///////////////////////////////////////////////////////////////////// + /// The ID of the currently displayed Pie. + ///////////////////////////////////////////////////////////////////// + + private string current_id = ""; + + ///////////////////////////////////////////////////////////////////// + /// The position from where a Slice-drag started. + ///////////////////////////////////////////////////////////////////// + + private int drag_start_index = -1; + + ///////////////////////////////////////////////////////////////////// + /// C'tor, creates the widget. + ///////////////////////////////////////////////////////////////////// + + public PiePreview() { + this.renderer = new PiePreviewRenderer(); + + #if HAVE_GTK_3 + this.draw.connect(this.on_draw); + #else + this.expose_event.connect(this.on_draw); + #endif + + this.timer = new GLib.Timer(); + this.set_events(Gdk.EventMask.POINTER_MOTION_MASK + | Gdk.EventMask.LEAVE_NOTIFY_MASK + | Gdk.EventMask.ENTER_NOTIFY_MASK); + + // setup drag and drop + this.enable_drag_source(); + + Gtk.TargetEntry uri_dest = {"text/uri-list", 0, 0}; + Gtk.TargetEntry slice_dest = {"text/plain", Gtk.TargetFlags.SAME_WIDGET, 0}; + Gtk.TargetEntry[] destinations = { uri_dest, slice_dest }; + Gtk.drag_dest_set(this, Gtk.DestDefaults.ALL, destinations, Gdk.DragAction.COPY | Gdk.DragAction.MOVE | Gdk.DragAction.LINK); + + this.drag_begin.connect(this.on_start_drag); + this.drag_end.connect(this.on_end_drag); + this.drag_data_received.connect(this.on_dnd_received); + + // connect mouse events + this.drag_motion.connect(this.on_drag_move); + this.leave_notify_event.connect(this.on_mouse_leave); + this.enter_notify_event.connect(this.on_mouse_enter); + this.motion_notify_event.connect_after(this.on_mouse_move); + this.button_release_event.connect_after(this.on_button_release); + this.button_press_event.connect_after(this.on_button_press); + + this.new_slice_window = new NewSliceWindow(); + this.new_slice_window.on_select.connect((new_action, as_new_slice, at_position) => { + var pie = PieManager.all_pies[this.current_id]; + + if (new_action.has_quickaction()) + renderer.disable_quickactions(); + + if (as_new_slice) { + pie.add_group(new_action, at_position+1); + this.renderer.add_group(new_action, at_position+1); + + if (this.renderer.slice_count() == 1) + this.on_first_slice_added(); + } else { + pie.update_group(new_action, at_position); + this.renderer.update_group(new_action, at_position); + } + }); + + this.renderer.on_edit_slice.connect((pos) => { + this.new_slice_window.reload(); + + this.new_slice_window.set_parent(this.get_toplevel() as Gtk.Window); + this.new_slice_window.show(); + + var pie = PieManager.all_pies[this.current_id]; + this.new_slice_window.set_action(pie.action_groups[pos], pos); + }); + + this.renderer.on_add_slice.connect((pos) => { + this.new_slice_window.reload(); + + this.new_slice_window.set_parent(this.get_toplevel() as Gtk.Window); + this.new_slice_window.show(); + + this.new_slice_window.set_default(this.current_id, pos); + }); + + this.renderer.on_remove_slice.connect((pos) => { + + var dialog = new Gtk.MessageDialog(this.get_toplevel() as Gtk.Window, Gtk.DialogFlags.MODAL, + Gtk.MessageType.QUESTION, Gtk.ButtonsType.YES_NO, + _("Do you really want to delete this Slice?")); + + dialog.response.connect((response) => { + if (response == Gtk.ResponseType.YES) { + var pie = PieManager.all_pies[this.current_id]; + + pie.remove_group(pos); + this.renderer.remove_group(pos); + + if (this.renderer.slice_count() == 0) + this.on_last_slice_removed(); + } + }); + + dialog.run(); + dialog.destroy(); + }); + } + + ///////////////////////////////////////////////////////////////////// + /// Sets the currently displayed Pie to the Pie with the given ID. + ///////////////////////////////////////////////////////////////////// + + public void set_pie(string id) { + this.current_id = id; + this.modify_bg(Gtk.StateType.NORMAL, Gtk.rc_get_style(this).light[0]); + this.renderer.load_pie(PieManager.all_pies[id]); + } + + ///////////////////////////////////////////////////////////////////// + /// Begins the draw loop. It automatically ends, when the containing + /// window becomes invisible. + ///////////////////////////////////////////////////////////////////// + + public void draw_loop() { + this.timer.start(); + this.queue_draw(); + + GLib.Timeout.add((uint)(1000.0/Config.global.refresh_rate), () => { + this.queue_draw(); + return this.get_toplevel().visible; + }); + } + + ///////////////////////////////////////////////////////////////////// + /// Called every frame. + ///////////////////////////////////////////////////////////////////// + + #if HAVE_GTK_3 + private bool on_draw(Cairo.Context ctx) { + #else + private bool on_draw(Gtk.Widget da, Gdk.EventExpose event) { + var ctx = Gdk.cairo_create(this.get_window()); + #endif + // store the frame time + double frame_time = this.timer.elapsed(); + this.timer.reset(); + + Gtk.Allocation allocation; + this.get_allocation(out allocation); + ctx.translate((int)(allocation.width*0.5), (int)(allocation.height*0.5)); + + this.renderer.draw(frame_time, ctx); + + return true; + } + + ///////////////////////////////////////////////////////////////////// + /// Called when the mouse leaves the area of this widget. + ///////////////////////////////////////////////////////////////////// + + public bool on_mouse_leave(Gdk.EventCrossing event) { + this.renderer.on_mouse_leave(); + return true; + } + + ///////////////////////////////////////////////////////////////////// + /// Called when the mouse enters the area of this widget. + ///////////////////////////////////////////////////////////////////// + + public bool on_mouse_enter(Gdk.EventCrossing event) { + this.renderer.on_mouse_enter(); + return true; + } + + ///////////////////////////////////////////////////////////////////// + /// Called when the mouse moves in the area of this widget. + ///////////////////////////////////////////////////////////////////// + + private bool on_mouse_move(Gdk.EventMotion event) { + this.renderer.set_dnd_mode(false); + Gtk.Allocation allocation; + this.get_allocation(out allocation); + this.renderer.on_mouse_move(event.x-allocation.width*0.5, event.y-allocation.height*0.5); + + if (this.renderer.get_active_slice() < 0) this.disable_drag_source(); + else this.enable_drag_source(); + + return true; + } + + ///////////////////////////////////////////////////////////////////// + /// Called when a mouse button is pressed. + ///////////////////////////////////////////////////////////////////// + + private bool on_button_press() { + this.renderer.on_button_press(); + return true; + } + + ///////////////////////////////////////////////////////////////////// + /// Called when a mouse button is released. + ///////////////////////////////////////////////////////////////////// + + private bool on_button_release() { + if (!this.renderer.drag_n_drop_mode) + this.renderer.on_button_release(); + return true; + } + + ///////////////////////////////////////////////////////////////////// + /// Called when the mouse is moved over this widget. + ///////////////////////////////////////////////////////////////////// + + private bool on_drag_move(Gdk.DragContext ctx, int x, int y, uint time) { + this.renderer.set_dnd_mode(true); + Gtk.Allocation allocation; + this.get_allocation(out allocation); + this.renderer.on_mouse_move(x-allocation.width*0.5, y-allocation.height*0.5); + return true; + } + + ///////////////////////////////////////////////////////////////////// + /// Called when the user tries to drag something from this widget. + ///////////////////////////////////////////////////////////////////// + + private void on_start_drag(Gdk.DragContext ctx) { + this.drag_start_index = this.renderer.get_active_slice(); + var icon = this.renderer.get_active_icon(); + var pixbuf = icon.to_pixbuf(); + + this.renderer.hide_group(this.drag_start_index); + Gtk.drag_set_icon_pixbuf(ctx, pixbuf, icon.size()/2, icon.size()/2); + + this.renderer.set_dnd_mode(true); + } + + ///////////////////////////////////////////////////////////////////// + /// Called when the user finishes a drag operation on this widget. + /// Only used for Slice-movement. + ///////////////////////////////////////////////////////////////////// + + private void on_end_drag(Gdk.DragContext context) { + + if (context.list_targets() != null) { + + int target_index = this.renderer.get_active_slice(); + this.renderer.set_dnd_mode(false); + + context.list_targets().foreach((target) => { + Gdk.Atom target_type = (Gdk.Atom)target; + if (target_type.name() == "text/plain") { + var pie = PieManager.all_pies[this.current_id]; + pie.move_group(this.drag_start_index, target_index); + this.renderer.show_hidden_group_at(target_index); + } + }); + } + } + + ///////////////////////////////////////////////////////////////////// + /// Called when the user finishes a drag operation on this widget. + /// Only used for external drags. + ///////////////////////////////////////////////////////////////////// + + private void on_dnd_received(Gdk.DragContext context, int x, int y, + Gtk.SelectionData selection_data, uint info, uint time_) { + + var pie = PieManager.all_pies[this.current_id]; + int position = this.renderer.get_active_slice(); + this.renderer.set_dnd_mode(false); + + foreach (var uri in selection_data.get_uris()) { + pie.add_action(ActionRegistry.new_for_uri(uri), position); + this.renderer.add_group(pie.action_groups[position], position); + + if (this.renderer.slices.size == 1) + this.on_first_slice_added(); + } + } + + ///////////////////////////////////////////////////////////////////// + /// Enables this widget to be a source for drag operations. + ///////////////////////////////////////////////////////////////////// + + private void enable_drag_source() { + if (!this.drag_enabled) { + this.drag_enabled = true; + Gtk.TargetEntry slice_source = {"text/plain", Gtk.TargetFlags.SAME_WIDGET | Gtk.TargetFlags.SAME_APP, 0}; + Gtk.TargetEntry[] sources = { slice_source }; + Gtk.drag_source_set(this, Gdk.ModifierType.BUTTON1_MASK, sources, Gdk.DragAction.MOVE); + } + } + + ///////////////////////////////////////////////////////////////////// + /// Disables this widget to be a source for drag operations. + ///////////////////////////////////////////////////////////////////// + + private void disable_drag_source() { + if (this.drag_enabled) { + this.drag_enabled = false; + Gtk.drag_source_unset(this); + } + } + +} + +} |