Kstars

labelsitem.h
1/*
2 SPDX-FileCopyrightText: 2016 Artem Fedoskin <afedoskin3@gmail.com>
3 SPDX-License-Identifier: GPL-2.0-or-later
4*/
5
6#pragma once
7
8#include "skylabeler.h"
9#include "typedef.h"
10#include "typedeflite.h"
11
12#include "skyopacitynode.h"
13
14class StarItem;
15class LabelNode;
16class GuideLabelNode;
17class RootNode;
18class TrixelNode;
19
20class SkyObject;
21
23
24/**
25 * @class LabelsItem
26 *
27 * This class is in charge of labels in SkyMapLite. Labels can be instantiated by calling addLabel with
28 * either SkyObject or plain QString as a name. There are two types of label nodes available - LabelNode
29 * that can't be rotated and GuideLabelNode that supports rotation (but it is not used anywhere yet).
30 *
31 * To prevent labels from overlapping this class uses SkyLabeler. We check LabelNode for overlapping by
32 * calling SkyLabeler::markText() (SkyLabeler::markRegion() for GuideLabelNode) and update().
33 *
34 * Each of SkyItems that uses labels has its own label type in enum label_t (copied from SkyLabeler but
35 * was extended). Labels of particular type are reparented to LabelTypeNode(QSGOpacityNode) so
36 * to hide all labels of some type you just need to set opacity of LabelTypeNode that corresponds to
37 * this type to 0.
38 *
39 * Order of drawing can be changed in LabelsItem's constructor. Order of labels update can be changed in
40 * update().
41 *
42 * This class is not derived from SkyItem as it doesn't have label type and SkyItem's header needs an
43 * inclusion of this header to allow use of label_t enum. (Might be a good idea to fix this)
44 *
45 * @note font size is set in SkyLabeler::SkyLabeler() by initializing m_stdFont with default font
46 *
47 * @short Handles labels in SkyMapLite
48 * @author Artem Fedoskin
49 * @version 1.0
50 */
51
53{
54 public:
55 /**
56 * @brief Constructor
57 */
58 LabelsItem();
59
60 /** @short The label_t enum. Holds types of labels */
62 {
63 STAR_LABEL,
64 ASTEROID_LABEL,
65 COMET_LABEL,
66 PLANET_LABEL,
67 JUPITER_MOON_LABEL,
68 SATURN_MOON_LABEL,
69 DEEP_SKY_LABEL,
70 DSO_MESSIER_LABEL,
71 DSO_OTHER_LABEL,
72 CONSTEL_NAME_LABEL,
73 SATELLITE_LABEL,
74 RUDE_LABEL, ///Rude labels block other labels FIXME: find a better solution
76 HORIZON_LABEL,
77 EQUATOR_LABEL,
78 ECLIPTIC_LABEL,
79 TELESCOPE_SYMBOL,
80 CATALOG_STAR_LABEL,
81 CATALOG_DSO_LABEL,
82 NO_LABEL //used in LinesItem
83 };
84
85 /**
86 * Create LabelNode with given skyObject and append it to LabelTypeNode that corresponds
87 * to type
88 * @param skyObject for which the label is created
89 * @param labelType type of LabelTypeNode to which this label has to be reparented
90 * @return pointer to newly created LabelNode
91 */
92 LabelNode *addLabel(SkyObject *skyObject, label_t labelType);
93
94 /**
95 * Create LabelNode and append it to corresponding TrixelNode so that all labels
96 * can be hidden whenever Trixel is not displayed. Use for sky objects that are indexed by SkyMesh
97 * @param skyObject for which the label is created
98 * @param labelType type of LabelTypeNode to which this label has to be reparented
99 * @param trixel id of trixel
100 **/
101 LabelNode *addLabel(SkyObject *skyObject, label_t labelType, Trixel trixel);
102
103 /** @short does the same as above but with QString instead of SkyObject */
104 LabelNode *addLabel(QString name, label_t labelType);
105
106 /**
107 * @short does the same as above but instead creates GuideLabelNode
108 * @note currently GuideLabelNode is not used anywhere so it is not fully supported yet
109 */
110 GuideLabelNode *addGuideLabel(QString name, label_t labelType);
111
112 /**
113 * The order of labels update can be changed here.
114 * @short updates all child labels
115 */
116 void update();
117
118 /**
119 * @short updates child labels of LabelTypeNode that corresponds to type in m_labelsLists
120 * Labels for stars and DSOs we update labels only if corresponding TrixelNode is visible.
121 * @param labelType type of LabelTypeNode (see m_labelsLists)
122 */
123 void updateChildLabels(label_t labelType);
124
125 /** @return LabelTypeNode that holds labels of labelType */
126 LabelTypeNode *getLabelNode(label_t labelType) { return m_labelsLists.value(labelType); }
127
128 /** @short deletes all labels of type labelType */
129 void deleteLabels(label_t labelType);
130
131 /** @short deletes particular label */
132 void deleteLabel(LabelNode *label);
133
134 /** @short hides all labels of type labelType */
135 void hideLabels(label_t labelType);
136
137 /**
138 * @short shows all labels of type labelType
139 */
140
141 void showLabels(label_t labelType);
142
143 /** @short adds trixel to the node corresponding to labelType */
144 TrixelNode *addTrixel(label_t labelType, Trixel trixel);
145
146 /**
147 * @short sets m_rootNode and appends to it this node
148 * @param rootNode parent RootNode that instantiates this object
149 */
151
152 /** @return pointer to RootNode that instantiated this object */
153 RootNode *rootNode() { return m_rootNode; }
154
155 private:
156 QMap<label_t, LabelTypeNode *> m_labelsLists;
157
158 /** @short because this class is not derived from SkyItem it has to store pointer to RootNode */
159 RootNode *m_rootNode { nullptr };
160 SkyLabeler *skyLabeler { nullptr };
161};
Currently this class is not used anywhere.
A SkyNode derived class used for displaying labels.
Definition labelnode.h:27
This class is in charge of labels in SkyMapLite.
Definition labelsitem.h:53
void update()
The order of labels update can be changed here.
LabelNode * addLabel(SkyObject *skyObject, label_t labelType)
Create LabelNode with given skyObject and append it to LabelTypeNode that corresponds to type.
label_t
The label_t enum.
Definition labelsitem.h:62
@ NUM_LABEL_TYPES
Rude labels block other labels FIXME: find a better solution.
Definition labelsitem.h:75
void deleteLabels(label_t labelType)
deletes all labels of type labelType
void hideLabels(label_t labelType)
hides all labels of type labelType
void showLabels(label_t labelType)
shows all labels of type labelType
LabelTypeNode * getLabelNode(label_t labelType)
Definition labelsitem.h:126
LabelsItem()
Constructor.
TrixelNode * addTrixel(label_t labelType, Trixel trixel)
adds trixel to the node corresponding to labelType
void updateChildLabels(label_t labelType)
updates child labels of LabelTypeNode that corresponds to type in m_labelsLists Labels for stars and ...
RootNode * rootNode()
Definition labelsitem.h:153
void deleteLabel(LabelNode *label)
deletes particular label
GuideLabelNode * addGuideLabel(QString name, label_t labelType)
does the same as above but instead creates GuideLabelNode
void setRootNode(RootNode *rootNode)
sets m_rootNode and appends to it this node
A QSGClipNode derived class used as a container for holding pointers to nodes and for clipping.
Definition rootnode.h:60
The purpose of this class is to prevent labels from overlapping.
Definition skylabeler.h:99
Provides all necessary information about an object in the sky: its coordinates, name(s),...
Definition skyobject.h:42
A wrapper for QSGOpacityNode that provides hide() and show() functions.
Class that handles Stars.
Definition staritem.h:23
Convenience class that represents trixel in SkyMapLite.
Definition trixelnode.h:21
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