summaryrefslogtreecommitdiff
path: root/src/gui/piePreviewSliceRenderer.vala
diff options
context:
space:
mode:
authorAlessandro Ghedini <al3xbio@gmail.com>2012-01-21 19:07:09 +0100
committerAlessandro Ghedini <al3xbio@gmail.com>2012-01-21 19:07:09 +0100
commit60560a030fda3c539ff9dc1563b9926414a193da (patch)
tree77590b395685a8d48d3615e45629a1610d08c071 /src/gui/piePreviewSliceRenderer.vala
parentd6b2677825cbb423e2099563c16321c3e23d7899 (diff)
Imported Upstream version 0.4.0upstream/0.4.0
Diffstat (limited to 'src/gui/piePreviewSliceRenderer.vala')
-rw-r--r--src/gui/piePreviewSliceRenderer.vala276
1 files changed, 276 insertions, 0 deletions
diff --git a/src/gui/piePreviewSliceRenderer.vala b/src/gui/piePreviewSliceRenderer.vala
new file mode 100644
index 0000000..af39c1f
--- /dev/null
+++ b/src/gui/piePreviewSliceRenderer.vala
@@ -0,0 +1,276 @@
+/*
+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/>.
+*/
+
+using GLib.Math;
+
+namespace GnomePie {
+
+/////////////////////////////////////////////////////////////////////////
+/// Displays the preview of a Slice.
+/////////////////////////////////////////////////////////////////////////
+
+public class PiePreviewSliceRenderer : GLib.Object {
+
+ /////////////////////////////////////////////////////////////////////
+ /// Called when the user clicked on this Slice.
+ /////////////////////////////////////////////////////////////////////
+
+ public signal void on_clicked(int position);
+
+ /////////////////////////////////////////////////////////////////////
+ /// Called when the user clicked on the delete sign.
+ /////////////////////////////////////////////////////////////////////
+
+ public signal void on_remove(int position);
+
+ /////////////////////////////////////////////////////////////////////
+ /// The image used to display this oject.
+ /////////////////////////////////////////////////////////////////////
+
+ public Icon icon { get; private set; }
+ public ActionGroup action_group { get; private set; }
+ public string name { get; private set; default=""; }
+ public bool delete_hovered { get; private set; default=false; }
+
+ /////////////////////////////////////////////////////////////////////
+ /// The parent renderer.
+ /////////////////////////////////////////////////////////////////////
+
+ private unowned PiePreviewRenderer parent;
+
+ /////////////////////////////////////////////////////////////////////
+ /// The delete sign, displayed in the upper right corner of each
+ /// Slice.
+ /////////////////////////////////////////////////////////////////////
+
+ private PiePreviewDeleteSign delete_sign = null;
+
+ /////////////////////////////////////////////////////////////////////
+ /// Some AnimatedValues for smooth transitions.
+ /////////////////////////////////////////////////////////////////////
+
+ private AnimatedValue angle;
+ private AnimatedValue size;
+ private AnimatedValue activity;
+ private AnimatedValue clicked;
+
+ /////////////////////////////////////////////////////////////////////
+ /// Some constants determining the look and behaviour of this Slice.
+ /////////////////////////////////////////////////////////////////////
+
+ private const double pie_radius = 126;
+ private const double radius = 24;
+ private const double delete_x = 13;
+ private const double delete_y = -13;
+ private const double click_cancel_treshold = 5;
+
+ /////////////////////////////////////////////////////////////////////
+ /// Storing the position where a mouse click was executed. Useful for
+ /// canceling the click when the mouse moves some pixels.
+ /////////////////////////////////////////////////////////////////////
+
+ private double clicked_x = 0.0;
+ private double clicked_y = 0.0;
+
+ /////////////////////////////////////////////////////////////////////
+ /// The index of this slice in a pie. Clockwise assigned, starting
+ /// from the right-most slice.
+ /////////////////////////////////////////////////////////////////////
+
+ private int position;
+
+ /////////////////////////////////////////////////////////////////////
+ /// C'tor, sets everything up.
+ /////////////////////////////////////////////////////////////////////
+
+ public PiePreviewSliceRenderer(PiePreviewRenderer parent) {
+ this.delete_sign = new PiePreviewDeleteSign();
+ this.delete_sign.load();
+ this.delete_sign.on_clicked.connect(() => {
+ this.on_remove(this.position);
+ });
+
+ this.parent = parent;
+ this.angle = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, 0, 0, 0, 0.5);
+ this.size = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, 0, 0, 0, 1.0);
+ this.activity = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, 0, 0, 0, 0.0);
+ this.clicked = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, 1, 1, 0, 1.0);
+ }
+
+ /////////////////////////////////////////////////////////////////////
+ /// Loads an Action. All members are initialized accordingly.
+ /////////////////////////////////////////////////////////////////////
+
+ public void load(ActionGroup group) {
+ this.action_group = group;
+
+ // if it's a custom ActionGroup
+ if (group.get_type().depth() == 2 && group.actions.size > 0) {
+ this.icon = new Icon(group.actions[0].icon, (int)(radius*2));
+ this.name = group.actions[0].name;
+ } else {
+ this.icon = new Icon(GroupRegistry.descriptions[group.get_type().name()].icon, (int)(radius*2));
+ this.name = GroupRegistry.descriptions[group.get_type().name()].name;
+ }
+ }
+
+ /////////////////////////////////////////////////////////////////////
+ /// Updates the position where this object should be displayed.
+ /////////////////////////////////////////////////////////////////////
+
+ public void set_position(int position, bool smoothly = true) {
+ double direction = 2.0 * PI * position/parent.slice_count();
+
+ if (direction != this.angle.end) {
+ this.position = position;
+ this.angle.reset_target(direction, smoothly ? 0.5 : 0.0);
+
+ if (!smoothly)
+ this.angle.update(1.0);
+ }
+ }
+
+ /////////////////////////////////////////////////////////////////////
+ /// Updates the size of this object. All transitions will be smooth.
+ /////////////////////////////////////////////////////////////////////
+
+ public void set_size(double size) {
+ this.size.reset_target(size, 0.5);
+ this.delete_sign.set_size(size);
+ }
+
+ /////////////////////////////////////////////////////////////////////
+ /// Notifies that all quick actions should be disabled.
+ /////////////////////////////////////////////////////////////////////
+
+ public void disable_quickactions() {
+ this.action_group.disable_quickactions();
+ }
+
+ /////////////////////////////////////////////////////////////////////
+ /// Draws the slice to the given context.
+ /////////////////////////////////////////////////////////////////////
+
+ public void draw(double frame_time, Cairo.Context ctx) {
+ this.size.update(frame_time);
+ this.angle.update(frame_time);
+ this.activity.update(frame_time);
+ this.clicked.update(frame_time);
+
+ ctx.save();
+
+ // transform the context
+ ctx.translate(cos(this.angle.val)*pie_radius, sin(this.angle.val)*pie_radius);
+
+ double scale = this.size.val*this.clicked.val
+ + this.activity.val*0.1 - 0.1;
+ ctx.save();
+
+ ctx.scale(scale, scale);
+
+ // paint the image
+ icon.paint_on(ctx);
+
+ ctx.restore();
+
+ ctx.translate(delete_x*this.size.val, delete_y*this.size.val);
+ this.delete_sign.draw(frame_time, ctx);
+
+ ctx.restore();
+ }
+
+ /////////////////////////////////////////////////////////////////////
+ /// Called when the mouse moves to another position.
+ /////////////////////////////////////////////////////////////////////
+
+ public bool on_mouse_move(double angle, double x, double y) {
+ double direction = 2.0 * PI * position/parent.slice_count();
+ double diff = fabs(angle-direction);
+
+ if (diff > PI)
+ diff = 2 * PI - diff;
+
+ bool active = diff < 0.5*PI/parent.slice_count();
+
+ if (active) {
+ this.activity.reset_target(1.0, 0.3);
+ this.delete_sign.show();
+ } else {
+ this.activity.reset_target(0.0, 0.3);
+ this.delete_sign.hide();
+ }
+
+ if (this.clicked.end == 0.9) {
+ double dist = GLib.Math.pow(x-this.clicked_x, 2) + GLib.Math.pow(y-this.clicked_y, 2);
+ if (dist > this.click_cancel_treshold*this.click_cancel_treshold)
+ this.clicked.reset_target(1.0, 0.1);
+ }
+
+ double own_x = cos(this.angle.val)*pie_radius;
+ double own_y = sin(this.angle.val)*pie_radius;
+ this.delete_hovered = this.delete_sign.on_mouse_move(x - own_x - delete_x*this.size.val,
+ y - own_y - delete_y*this.size.val);
+
+ return active;
+ }
+
+ /////////////////////////////////////////////////////////////////////
+ /// Called when the mouse leaves the area of this widget.
+ /////////////////////////////////////////////////////////////////////
+
+ public void on_mouse_leave() {
+ this.activity.reset_target(0.0, 0.3);
+ this.delete_sign.hide();
+ }
+
+ /////////////////////////////////////////////////////////////////////
+ /// Called when a button of the mouse is pressed.
+ /////////////////////////////////////////////////////////////////////
+
+ public void on_button_press(double x, double y) {
+ bool delete_pressed = false;
+ if (this.activity.end == 1.0) {
+ double own_x = cos(this.angle.val)*pie_radius;
+ double own_y = sin(this.angle.val)*pie_radius;
+ delete_pressed = this.delete_sign.on_button_press(x - own_x - delete_x*this.size.val,
+ y - own_y - delete_y*this.size.val);
+ }
+
+ if (!delete_pressed && this.activity.end == 1.0) {
+ this.clicked.reset_target(0.9, 0.1);
+ this.clicked_x = x;
+ this.clicked_y = y;
+ }
+ }
+
+ /////////////////////////////////////////////////////////////////////
+ /// Called when a button of the mouse is released.
+ /////////////////////////////////////////////////////////////////////
+
+ public void on_button_release(double x, double y) {
+ bool deleted = false;
+ if (this.activity.end == 1.0)
+ deleted = this.delete_sign.on_button_release(x, y);
+
+ if (!deleted && this.clicked.end == 0.9) {
+ this.clicked.reset_target(1.0, 0.1);
+ this.on_clicked(this.position);
+ }
+ }
+}
+
+}