1 // panel_io.cxx - I/O for 2D panel.
3 // Written by David Megginson, started January 2000.
5 // This program is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU General Public License as
7 // published by the Free Software Foundation; either version 2 of the
8 // License, or (at your option) any later version.
10 // This program is distributed in the hope that it will be useful, but
11 // WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // General Public License for more details.
15 // You should have received a copy of the GNU General Public License
16 // along with this program; if not, write to the Free Software
17 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
29 #include <string.h> // for strcmp()
31 #include <simgear/compiler.h>
32 #include <simgear/structure/exception.hxx>
33 #include <simgear/debug/logstream.hxx>
34 #include <simgear/misc/sg_path.hxx>
35 #include <simgear/props/props.hxx>
41 #include <Main/globals.hxx>
42 #include <Main/fg_props.hxx>
46 // #include "panel.hxx"
47 #include "panel_io.hxx"
48 #include <Instrumentation/KLN89/kln89.hxx>
51 #include "built_in/FGMagRibbon.hxx"
53 SG_USING_STD(istream);
54 SG_USING_STD(ifstream);
59 ////////////////////////////////////////////////////////////////////////
60 // Read and construct a panel.
62 // The panel is specified as a regular property list, and each of the
63 // instruments is its own, separate property list (and thus, a separate
64 // XML document). The functions in this section read in the files
65 // as property lists, then extract properties to set up the panel
68 // A panel contains zero or more instruments.
70 // An instrument contains one or more layers and zero or more actions.
72 // A layer contains zero or more transformations.
74 // Some special types of layers also contain other objects, such as
75 // chunks of text or other layers.
77 // There are currently four types of layers:
79 // 1. Textured Layer (type="texture"), the default
80 // 2. Text Layer (type="text")
81 // 3. Switch Layer (type="switch")
82 // 4. Built-in Layer (type="built-in", must also specify class)
84 // The only built-in layer so far is the ribbon for the magnetic compass
85 // (class="compass-ribbon").
87 // There are three types of actions:
89 // 1. Adjust (type="adjust"), the default
90 // 2. Swap (type="swap")
91 // 3. Toggle (type="toggle")
93 // There are three types of transformations:
95 // 1. X shift (type="x-shift"), the default
96 // 2. Y shift (type="y-shift")
97 // 3. Rotation (type="rotation")
99 // Each of these may be associated with a property, so that a needle
100 // will rotate with the airspeed, for example, or may have a fixed
101 // floating-point value.
102 ////////////////////////////////////////////////////////////////////////
106 * Read a cropped texture from the instrument's property list.
108 * The x1 and y1 properties give the starting position of the texture
109 * (between 0.0 and 1.0), and the the x2 and y2 properties give the
110 * ending position. For example, to use the bottom-left quarter of a
111 * texture, x1=0.0, y1=0.0, x2=0.5, y2=0.5.
113 static FGCroppedTexture
114 readTexture (const SGPropertyNode * node)
116 FGCroppedTexture texture(node->getStringValue("path"),
117 node->getFloatValue("x1"),
118 node->getFloatValue("y1"),
119 node->getFloatValue("x2", 1.0),
120 node->getFloatValue("y2", 1.0));
121 SG_LOG(SG_COCKPIT, SG_DEBUG, "Read texture " << node->getName());
127 * Test for a condition in the current node.
130 ////////////////////////////////////////////////////////////////////////
131 // Read a condition and use it if necessary.
132 ////////////////////////////////////////////////////////////////////////
135 readConditions (SGConditional *component, const SGPropertyNode *node)
137 const SGPropertyNode * conditionNode = node->getChild("condition");
138 if (conditionNode != 0)
139 // The top level is implicitly AND
140 component->setCondition(sgReadCondition(globals->get_props(),
146 * Read an action from the instrument's property list.
148 * The action will be performed when the user clicks a mouse button
149 * within the specified region of the instrument. Actions always work
150 * by modifying the value of a property (see the SGPropertyNode
153 * The following action types are defined:
155 * "adjust" - modify the value of a floating-point property by
156 * the increment specified. This is the default.
158 * "swap" - swap the values of two-floating-point properties.
160 * "toggle" - toggle the value of a boolean property between true and
163 * For the adjust action, it is possible to specify an increment
164 * (use a negative number for a decrement), a minimum allowed value,
165 * a maximum allowed value, and a flag to indicate whether the value
166 * should freeze or wrap-around when it reachs the minimum or maximum.
168 * The action will be scaled automatically if the instrument is not
169 * being drawn at its regular size.
171 static FGPanelAction *
172 readAction (const SGPropertyNode * node, float w_scale, float h_scale)
175 SGPropertyNode *binding;
176 vector<SGPropertyNode_ptr>bindings = node->getChildren("binding");
178 // button-less actions are fired initially
179 if (!node->hasValue("w") || !node->hasValue("h")) {
180 for (i = 0; i < bindings.size(); i++) {
181 FGBinding b(bindings[i]);
187 string name = node->getStringValue("name");
189 int button = node->getIntValue("button");
190 int x = int(node->getIntValue("x") * w_scale);
191 int y = int(node->getIntValue("y") * h_scale);
192 int w = int(node->getIntValue("w") * w_scale);
193 int h = int(node->getIntValue("h") * h_scale);
194 bool repeatable = node->getBoolValue("repeatable", true);
196 FGPanelAction * action = new FGPanelAction(button, x, y, w, h, repeatable);
198 SGPropertyNode * dest = fgGetNode("/sim/bindings/panel", true);
200 for (i = 0; i < bindings.size(); i++) {
201 SG_LOG(SG_INPUT, SG_INFO, "Reading binding "
202 << bindings[i]->getStringValue("command"));
205 while (dest->getChild("binding", j))
208 binding = dest->getChild("binding", j, true);
209 copyProperties(bindings[i], binding);
210 action->addBinding(new FGBinding(binding), 0);
213 if (node->hasChild("mod-up")) {
214 bindings = node->getChild("mod-up")->getChildren("binding");
215 for (i = 0; i < bindings.size(); i++) {
217 while (dest->getChild("binding", j))
220 binding = dest->getChild("binding", j, true);
221 copyProperties(bindings[i], binding);
222 action->addBinding(new FGBinding(binding), 1);
226 readConditions(action, node);
232 * Read a transformation from the instrument's property list.
234 * The panel module uses the transformations to slide or spin needles,
235 * knobs, and other indicators, and to place layers in the correct
236 * positions. Every layer starts centered exactly on the x,y co-ordinate,
237 * and many layers need to be moved or rotated simply to display the
238 * instrument correctly.
240 * There are three types of transformations:
242 * "x-shift" - move the layer horizontally.
244 * "y-shift" - move the layer vertically.
246 * "rotation" - rotate the layer.
248 * Each transformation may have a fixed offset, and may also have
249 * a floating-point property value to add to the offset. The
250 * floating-point property may be clamped to a minimum and/or
251 * maximum range and scaled (after clamping).
253 * Note that because of the way OpenGL works, transformations will
254 * appear to be applied backwards.
256 static FGPanelTransformation *
257 readTransformation (const SGPropertyNode * node, float w_scale, float h_scale)
259 FGPanelTransformation * t = new FGPanelTransformation;
261 string name = node->getName();
262 string type = node->getStringValue("type");
263 string propName = node->getStringValue("property", "");
264 SGPropertyNode * target = 0;
267 SG_LOG( SG_COCKPIT, SG_INFO,
268 "No type supplied for transformation " << name
269 << " assuming \"rotation\"" );
273 if (!propName.empty()) {
274 target = fgGetNode(propName.c_str(), true);
278 t->min = node->getFloatValue("min", -9999999);
279 t->max = node->getFloatValue("max", 99999999);
280 t->has_mod = node->hasChild("modulator");
282 t->mod = node->getFloatValue("modulator");
283 t->factor = node->getFloatValue("scale", 1.0);
284 t->offset = node->getFloatValue("offset", 0.0);
286 // Check for an interpolation table
287 const SGPropertyNode * trans_table = node->getNode("interpolation");
288 if (trans_table != 0) {
289 SG_LOG( SG_COCKPIT, SG_INFO, "Found interpolation table with "
290 << trans_table->nChildren() << "children" );
291 t->table = new SGInterpTable();
292 for(int i = 0; i < trans_table->nChildren(); i++) {
293 const SGPropertyNode * node = trans_table->getChild(i);
294 if (!strcmp(node->getName(), "entry")) {
295 double ind = node->getDoubleValue("ind", 0.0);
296 double dep = node->getDoubleValue("dep", 0.0);
297 SG_LOG( SG_COCKPIT, SG_INFO, "Adding interpolation entry "
298 << ind << "==>" << dep );
299 t->table->addEntry(ind, dep);
301 SG_LOG( SG_COCKPIT, SG_INFO, "Skipping " << node->getName()
302 << " in interpolation" );
309 // Move the layer horizontally.
310 if (type == "x-shift") {
311 t->type = FGPanelTransformation::XSHIFT;
312 // t->min *= w_scale; //removed by Martin Dressler
313 // t->max *= w_scale; //removed by Martin Dressler
314 t->offset *= w_scale;
315 t->factor *= w_scale; //Added by Martin Dressler
318 // Move the layer vertically.
319 else if (type == "y-shift") {
320 t->type = FGPanelTransformation::YSHIFT;
321 //t->min *= h_scale; //removed
322 //t->max *= h_scale; //removed
323 t->offset *= h_scale;
324 t->factor *= h_scale; //Added
327 // Rotate the layer. The rotation
328 // is in degrees, and does not need
329 // to scale with the instrument size.
330 else if (type == "rotation") {
331 t->type = FGPanelTransformation::ROTATION;
335 SG_LOG( SG_COCKPIT, SG_ALERT, "Unrecognized transformation type " << type );
340 readConditions(t, node);
341 SG_LOG( SG_COCKPIT, SG_DEBUG, "Read transformation " << name );
347 * Read a chunk of text from the instrument's property list.
349 * A text layer consists of one or more chunks of text. All chunks
350 * share the same font size and color (and eventually, font), but
351 * each can come from a different source. There are three types of
354 * "literal" - a literal text string (the default)
356 * "text-value" - the current value of a string property
358 * "number-value" - the current value of a floating-point property.
360 * All three may also include a printf-style format string.
363 readTextChunk (const SGPropertyNode * node)
365 FGTextLayer::Chunk * chunk;
366 string name = node->getStringValue("name");
367 string type = node->getStringValue("type");
368 string format = node->getStringValue("format");
370 // Default to literal text.
372 SG_LOG( SG_COCKPIT, SG_INFO, "No type provided for text chunk " << name
373 << " assuming \"literal\"");
377 // A literal text string.
378 if (type == "literal") {
379 string text = node->getStringValue("text");
380 chunk = new FGTextLayer::Chunk(text, format);
383 // The value of a string property.
384 else if (type == "text-value") {
385 SGPropertyNode * target =
386 fgGetNode(node->getStringValue("property"), true);
387 chunk = new FGTextLayer::Chunk(FGTextLayer::TEXT_VALUE, target, format);
390 // The value of a float property.
391 else if (type == "number-value") {
392 string propName = node->getStringValue("property");
393 float scale = node->getFloatValue("scale", 1.0);
394 float offset = node->getFloatValue("offset", 0.0);
395 bool truncation = node->getBoolValue("truncate", false);
396 SGPropertyNode * target = fgGetNode(propName.c_str(), true);
397 chunk = new FGTextLayer::Chunk(FGTextLayer::DOUBLE_VALUE, target,
398 format, scale, offset, truncation);
403 SG_LOG( SG_COCKPIT, SG_ALERT, "Unrecognized type " << type
404 << " for text chunk " << name );
408 readConditions(chunk, node);
414 * Read a single layer from an instrument's property list.
416 * Each instrument consists of one or more layers stacked on top
417 * of each other; the lower layers show through only where the upper
418 * layers contain an alpha component. Each layer can be moved
419 * horizontally and vertically and rotated using transformations.
421 * This module currently recognizes four kinds of layers:
423 * "texture" - a layer containing a texture (the default)
425 * "text" - a layer containing text
427 * "switch" - a layer that switches between two other layers
428 * based on the current value of a boolean property.
430 * "built-in" - a hard-coded layer supported by C++ code in FlightGear.
432 * Currently, the only built-in layer class is "compass-ribbon".
434 static FGInstrumentLayer *
435 readLayer (const SGPropertyNode * node, float w_scale, float h_scale)
437 FGInstrumentLayer * layer = NULL;
438 string name = node->getStringValue("name");
439 string type = node->getStringValue("type");
440 int w = node->getIntValue("w", -1);
441 int h = node->getIntValue("h", -1);
442 bool emissive = node->getBoolValue("emissive", false);
444 w = int(w * w_scale);
446 h = int(h * h_scale);
450 SG_LOG( SG_COCKPIT, SG_INFO,
451 "No type supplied for layer " << name
452 << " assuming \"texture\"" );
457 // A textured instrument layer.
458 if (type == "texture") {
459 FGCroppedTexture texture = readTexture(node->getNode("texture"));
460 layer = new FGTexturedLayer(texture, w, h);
462 FGTexturedLayer *tl=(FGTexturedLayer*)layer;
463 tl->setEmissive(true);
468 // A group of sublayers.
469 else if (type == "group") {
470 layer = new FGGroupLayer();
471 for (int i = 0; i < node->nChildren(); i++) {
472 const SGPropertyNode * child = node->getChild(i);
473 if (!strcmp(child->getName(), "layer"))
474 ((FGGroupLayer *)layer)->addLayer(readLayer(child, w_scale, h_scale));
479 // A textual instrument layer.
480 else if (type == "text") {
481 FGTextLayer * tlayer = new FGTextLayer(w, h); // FIXME
483 // Set the text color.
484 float red = node->getFloatValue("color/red", 0.0);
485 float green = node->getFloatValue("color/green", 0.0);
486 float blue = node->getFloatValue("color/blue", 0.0);
487 tlayer->setColor(red, green, blue);
489 // Set the point size.
490 float pointSize = node->getFloatValue("point-size", 10.0) * w_scale;
491 tlayer->setPointSize(pointSize);
494 string fontName = node->getStringValue("font", "Helvetica");
495 tlayer->setFontName(fontName);
497 const SGPropertyNode * chunk_group = node->getNode("chunks");
498 if (chunk_group != 0) {
499 int nChunks = chunk_group->nChildren();
500 for (int i = 0; i < nChunks; i++) {
501 const SGPropertyNode * node = chunk_group->getChild(i);
502 if (!strcmp(node->getName(), "chunk")) {
503 FGTextLayer::Chunk * chunk = readTextChunk(node);
505 tlayer->addChunk(chunk);
507 SG_LOG( SG_COCKPIT, SG_INFO, "Skipping " << node->getName()
515 // A switch instrument layer.
516 else if (type == "switch") {
517 layer = new FGSwitchLayer();
518 for (int i = 0; i < node->nChildren(); i++) {
519 const SGPropertyNode * child = node->getChild(i);
520 if (!strcmp(child->getName(), "layer"))
521 ((FGGroupLayer *)layer)->addLayer(readLayer(child, w_scale, h_scale));
525 // A built-in instrument layer.
526 else if (type == "built-in") {
527 string layerclass = node->getStringValue("class");
529 if (layerclass == "mag-ribbon") {
530 layer = new FGMagRibbon(w, h);
533 else if (layerclass.empty()) {
534 SG_LOG( SG_COCKPIT, SG_ALERT, "No class provided for built-in layer "
540 SG_LOG( SG_COCKPIT, SG_ALERT, "Unknown built-in layer class "
548 SG_LOG( SG_COCKPIT, SG_ALERT, "Unrecognized layer type " << type );
554 // Get the transformations for each layer.
556 const SGPropertyNode * trans_group = node->getNode("transformations");
557 if (trans_group != 0) {
558 int nTransformations = trans_group->nChildren();
559 for (int i = 0; i < nTransformations; i++) {
560 const SGPropertyNode * node = trans_group->getChild(i);
561 if (!strcmp(node->getName(), "transformation")) {
562 FGPanelTransformation * t = readTransformation(node, w_scale, h_scale);
564 layer->addTransformation(t);
566 SG_LOG( SG_COCKPIT, SG_INFO, "Skipping " << node->getName()
567 << " in transformations" );
572 readConditions(layer, node);
573 SG_LOG( SG_COCKPIT, SG_DEBUG, "Read layer " << name );
579 * Read an instrument from a property list.
581 * The instrument consists of a preferred width and height
582 * (the panel may override these), together with a list of layers
583 * and a list of actions to be performed when the user clicks
584 * the mouse over the instrument. All co-ordinates are relative
585 * to the instrument's position, so instruments are fully relocatable;
586 * likewise, co-ordinates for actions and transformations will be
587 * scaled automatically if the instrument is not at its preferred size.
589 static FGPanelInstrument *
590 readInstrument (const SGPropertyNode * node)
592 const string name = node->getStringValue("name");
593 int x = node->getIntValue("x", -1);
594 int y = node->getIntValue("y", -1);
595 int real_w = node->getIntValue("w", -1);
596 int real_h = node->getIntValue("h", -1);
597 int w = node->getIntValue("w-base", -1);
598 int h = node->getIntValue("h-base", -1);
600 if (x == -1 || y == -1) {
601 SG_LOG( SG_COCKPIT, SG_ALERT,
602 "x and y positions must be specified and > 0" );
609 w_scale = float(real_w) / float(w);
613 h_scale = float(real_h) / float(h);
617 SG_LOG( SG_COCKPIT, SG_DEBUG, "Reading instrument " << name );
619 FGLayeredInstrument * instrument =
620 new FGLayeredInstrument(x, y, w, h);
623 // Get the actions for the instrument.
625 const SGPropertyNode * action_group = node->getNode("actions");
626 if (action_group != 0) {
627 int nActions = action_group->nChildren();
628 for (int i = 0; i < nActions; i++) {
629 const SGPropertyNode * node = action_group->getChild(i);
630 if (!strcmp(node->getName(), "action")) {
631 FGPanelAction * action = readAction(node, w_scale, h_scale);
633 instrument->addAction(action);
635 SG_LOG( SG_COCKPIT, SG_INFO, "Skipping " << node->getName()
642 // Get the layers for the instrument.
644 const SGPropertyNode * layer_group = node->getNode("layers");
645 if (layer_group != 0) {
646 int nLayers = layer_group->nChildren();
647 for (int i = 0; i < nLayers; i++) {
648 const SGPropertyNode * node = layer_group->getChild(i);
649 if (!strcmp(node->getName(), "layer")) {
650 FGInstrumentLayer * layer = readLayer(node, w_scale, h_scale);
652 instrument->addLayer(layer);
654 SG_LOG( SG_COCKPIT, SG_INFO, "Skipping " << node->getName()
660 readConditions(instrument, node);
661 SG_LOG( SG_COCKPIT, SG_DEBUG, "Done reading instrument " << name );
667 * Construct the panel from a property tree.
670 readPanel (const SGPropertyNode * root)
672 SG_LOG( SG_COCKPIT, SG_INFO, "Reading properties for panel " <<
673 root->getStringValue("name", "[Unnamed Panel]") );
675 FGPanel * panel = new FGPanel();
676 panel->setWidth(root->getIntValue("w", 1024));
677 panel->setHeight(root->getIntValue("h", 443));
680 // Grab the visible external viewing area, default to
682 panel->setViewHeight(root->getIntValue("view-height",
683 768 - panel->getHeight() + 2));
686 // Grab the panel's initial offsets, default to 0, 0.
688 if (!fgHasNode("/sim/panel/x-offset"))
689 fgSetInt("/sim/panel/x-offset", root->getIntValue("x-offset", 0));
691 // conditional removed by jim wilson to allow panel xml code
692 // with y-offset defined to work...
693 if (!fgHasNode("/sim/panel/y-offset"))
694 fgSetInt("/sim/panel/y-offset", root->getIntValue("y-offset", 0));
697 // Assign the background texture, if any, or a bogus chequerboard.
699 string bgTexture = root->getStringValue("background");
700 if (bgTexture.empty())
702 panel->setBackground(FGTextureManager::createTexture(bgTexture.c_str()));
703 SG_LOG( SG_COCKPIT, SG_INFO, "Set background texture to " << bgTexture );
706 // Get multibackground if any...
708 string mbgTexture = root->getStringValue("multibackground[0]");
709 if (!mbgTexture.empty()) {
710 panel->setMultiBackground(FGTextureManager::createTexture(mbgTexture.c_str()), 0);
711 SG_LOG( SG_COCKPIT, SG_INFO, "Set background texture to " << mbgTexture );
713 mbgTexture = root->getStringValue("multibackground[1]");
714 if (mbgTexture.empty())
716 panel->setMultiBackground(FGTextureManager::createTexture(mbgTexture.c_str()), 1);
717 SG_LOG( SG_COCKPIT, SG_INFO, "Set background texture to " << mbgTexture );
719 mbgTexture = root->getStringValue("multibackground[2]");
720 if (mbgTexture.empty())
722 panel->setMultiBackground(FGTextureManager::createTexture(mbgTexture.c_str()), 2);
723 SG_LOG( SG_COCKPIT, SG_INFO, "Set background texture to " << mbgTexture );
725 mbgTexture = root->getStringValue("multibackground[3]");
726 if (mbgTexture.empty())
728 panel->setMultiBackground(FGTextureManager::createTexture(mbgTexture.c_str()), 3);
729 SG_LOG( SG_COCKPIT, SG_INFO, "Set background texture to " << mbgTexture );
731 mbgTexture = root->getStringValue("multibackground[4]");
732 if (mbgTexture.empty())
734 panel->setMultiBackground(FGTextureManager::createTexture(mbgTexture.c_str()), 4);
735 SG_LOG( SG_COCKPIT, SG_INFO, "Set background texture to " << mbgTexture );
737 mbgTexture = root->getStringValue("multibackground[5]");
738 if (mbgTexture.empty())
740 panel->setMultiBackground(FGTextureManager::createTexture(mbgTexture.c_str()), 5);
741 SG_LOG( SG_COCKPIT, SG_INFO, "Set background texture to " << mbgTexture );
743 mbgTexture = root->getStringValue("multibackground[6]");
744 if (mbgTexture.empty())
746 panel->setMultiBackground(FGTextureManager::createTexture(mbgTexture.c_str()), 6);
747 SG_LOG( SG_COCKPIT, SG_INFO, "Set background texture to " << mbgTexture );
749 mbgTexture = root->getStringValue("multibackground[7]");
750 if (mbgTexture.empty())
752 panel->setMultiBackground(FGTextureManager::createTexture(mbgTexture.c_str()), 7);
753 SG_LOG( SG_COCKPIT, SG_INFO, "Set background texture to " << mbgTexture );
760 // Create each instrument.
762 SG_LOG( SG_COCKPIT, SG_INFO, "Reading panel instruments" );
763 const SGPropertyNode * instrument_group = root->getChild("instruments");
764 if (instrument_group != 0) {
765 int nInstruments = instrument_group->nChildren();
766 for (int i = 0; i < nInstruments; i++) {
767 const SGPropertyNode * node = instrument_group->getChild(i);
768 if (!strcmp(node->getName(), "instrument")) {
769 FGPanelInstrument * instrument = readInstrument(node);
771 panel->addInstrument(instrument);
772 } else if(!strcmp(node->getName(), "special-instrument")) {
773 //cout << "Special instrument found in instruments section!\n";
774 const string name = node->getStringValue("name");
775 if(name == "KLN89 GPS") {
776 //cout << "Special instrument is KLN89\n";
778 int x = node->getIntValue("x", -1);
779 int y = node->getIntValue("y", -1);
780 int real_w = node->getIntValue("w", -1);
781 int real_h = node->getIntValue("h", -1);
782 int w = node->getIntValue("w-base", -1);
783 int h = node->getIntValue("h-base", -1);
785 if (x == -1 || y == -1) {
786 SG_LOG( SG_COCKPIT, SG_ALERT,
787 "x and y positions must be specified and > 0" );
794 w_scale = float(real_w) / float(w);
798 h_scale = float(real_h) / float(h);
802 SG_LOG( SG_COCKPIT, SG_DEBUG, "Reading instrument " << name );
804 // Warning - hardwired size!!!
805 RenderArea2D* instrument = new RenderArea2D(158, 40, 158, 40, x, y);
806 KLN89* gps = (KLN89*)globals->get_subsystem("kln89");
808 gps = new KLN89(instrument);
809 globals->add_subsystem("kln89", gps);
811 //gps->init(); // init seems to get called automagically.
812 FGSpecialInstrument* gpsinst = new FGSpecialInstrument(gps);
813 panel->addInstrument(gpsinst);
815 SG_LOG( SG_COCKPIT, SG_WARN, "Unknown special instrument found" );
818 SG_LOG( SG_COCKPIT, SG_INFO, "Skipping " << node->getName()
819 << " in instruments section" );
823 SG_LOG( SG_COCKPIT, SG_INFO, "Done reading panel instruments" );
827 // Return the new panel.
834 * Read a panel from a property list.
836 * Each panel instrument will appear in its own, separate
837 * property list. The top level simply names the panel and
838 * places the instruments in their appropriate locations (and
839 * optionally resizes them if necessary).
841 * Returns 0 if the read fails for any reason.
844 fgReadPanel (istream &input)
849 readProperties(input, &root);
850 } catch (const sg_exception &e) {
851 guiErrorMessage("Error reading panel: ", e);
854 return readPanel(&root);
859 * Read a panel from a property list.
861 * This function opens a stream to a file, then invokes the
862 * main fgReadPanel() function.
865 fgReadPanel (const string &relative_path)
867 SGPath path(globals->get_fg_root());
868 path.append(relative_path);
872 readProperties(path.str(), &root);
873 } catch (const sg_exception &e) {
874 guiErrorMessage("Error reading panel: ", e);
877 return readPanel(&root);
882 // end of panel_io.cxx