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authorAlessandro Ghedini <al3xbio@gmail.com>2011-11-20 15:50:38 +0100
committerAlessandro Ghedini <al3xbio@gmail.com>2011-11-20 15:51:50 +0100
commit3997b71e281a5f43cc8c1892e85de30728df7b2d (patch)
tree96f2be7c48af03b7c540eba9dd6680eb270f23b8 /src/renderers/centerRenderer.vala
parent902829c62f552f35517783570025b479745de3c5 (diff)
Imported Upstream version 0.3.1
Diffstat (limited to 'src/renderers/centerRenderer.vala')
-rw-r--r--src/renderers/centerRenderer.vala55
1 files changed, 51 insertions, 4 deletions
diff --git a/src/renderers/centerRenderer.vala b/src/renderers/centerRenderer.vala
index c30e9ce..fab633e 100644
--- a/src/renderers/centerRenderer.vala
+++ b/src/renderers/centerRenderer.vala
@@ -19,17 +19,44 @@ using GLib.Math;
namespace GnomePie {
-// Renders the center of a Pie.
+/////////////////////////////////////////////////////////////////////////
+/// Renders the center of a Pie.
+/////////////////////////////////////////////////////////////////////////
public class CenterRenderer : GLib.Object {
+ /////////////////////////////////////////////////////////////////////
+ /// The PieRenderer which owns this CenterRenderer.
+ /////////////////////////////////////////////////////////////////////
+
private unowned PieRenderer parent;
+
+ /////////////////////////////////////////////////////////////////////
+ /// The caption drawn in the center. Changes when the active slice
+ /// changes.
+ /////////////////////////////////////////////////////////////////////
+
private unowned Image? caption;
+
+ /////////////////////////////////////////////////////////////////////
+ /// The color of the currently active slice. Used to colorize layers.
+ /////////////////////////////////////////////////////////////////////
+
private Color color;
+ /////////////////////////////////////////////////////////////////////
+ /// Two AnimatedValues: alpha is for global transparency (when
+ /// fading in/out), activity is 1.0 if there is an active slice and
+ /// 0.0 if there is no active slice.
+ /////////////////////////////////////////////////////////////////////
+
private AnimatedValue activity;
private AnimatedValue alpha;
+ /////////////////////////////////////////////////////////////////////
+ /// C'tor, initializes all members.
+ /////////////////////////////////////////////////////////////////////
+
public CenterRenderer(PieRenderer parent) {
this.parent = parent;
this.activity = new AnimatedValue.linear(0.0, 0.0, Config.global.theme.transition_time);
@@ -38,11 +65,21 @@ public class CenterRenderer : GLib.Object {
this.caption = null;
}
+ /////////////////////////////////////////////////////////////////////
+ /// Initiates the fade-out animation by resetting the targets of the
+ /// AnimatedValues to 0.0.
+ /////////////////////////////////////////////////////////////////////
+
public void fade_out() {
this.activity.reset_target(0.0, Config.global.theme.fade_out_time);
this.alpha.reset_target(0.0, Config.global.theme.fade_out_time);
}
+ /////////////////////////////////////////////////////////////////////
+ /// Should be called if the active slice of the PieRenderer changes.
+ /// The members activity, caption and color are set accordingly.
+ /////////////////////////////////////////////////////////////////////
+
public void set_active_slice(SliceRenderer? active_slice) {
if (active_slice == null) {
this.activity.reset_target(0.0, Config.global.theme.transition_time);
@@ -53,17 +90,23 @@ public class CenterRenderer : GLib.Object {
}
}
+ /////////////////////////////////////////////////////////////////////
+ /// Draws all center layers and the caption.
+ /////////////////////////////////////////////////////////////////////
+
public void draw(double frame_time, Cairo.Context ctx, double angle, double distance) {
-
+ // get all center_layers
var layers = Config.global.theme.center_layers;
+ // update the AnimatedValues
this.activity.update(frame_time);
this.alpha.update(frame_time);
+ // draw each layer
foreach (var layer in layers) {
-
ctx.save();
+ // calculate all values needed for animation/drawing
double active_speed = (layer.active_rotation_mode == CenterLayer.RotationMode.TO_MOUSE) ?
0.0 : layer.active_rotation_speed;
double inactive_speed = (layer.inactive_rotation_mode == CenterLayer.RotationMode.TO_MOUSE) ?
@@ -114,10 +157,14 @@ public class CenterRenderer : GLib.Object {
if (colorize > 0.0) ctx.push_group();
+ // transform the context
ctx.rotate(layer.rotation);
ctx.scale(max_scale, max_scale);
+
+ // paint the layer
layer.image.paint_on(ctx, this.alpha.val*max_alpha);
+ // colorize it, if necessary
if (colorize > 0.0) {
ctx.set_operator(Cairo.Operator.ATOP);
ctx.set_source_rgb(this.color.r, this.color.g, this.color.b);
@@ -135,7 +182,7 @@ public class CenterRenderer : GLib.Object {
if (Config.global.theme.caption && caption != null && this.activity.val > 0) {
ctx.save();
ctx.identity_matrix();
- int pos = this.parent.get_size()/2;
+ int pos = this.parent.size/2;
ctx.translate(pos, (int)(Config.global.theme.caption_position) + pos);
caption.paint_on(ctx, this.activity.val*this.alpha.val);
ctx.restore();