1 // layerwidget.cpp: Layer add/remove/use widget
3 // Part of the Architektonas Project
4 // (C) 2011 Underground Software
5 // See the README and GPLv3 files for licensing and warranty information
7 // JLH = James Hammons <jlhamm@acm.org>
10 // --- ---------- ------------------------------------------------------------
11 // JLH 07/11/2013 Created this file
14 #include "layerwidget.h"
16 #include "layeritemwidget.h"
19 LayerWidget::LayerWidget(void): QWidget(),
20 addLayer(new QToolButton), removeLayer(new QToolButton),
21 editLayer(new QToolButton), layerUp(new QToolButton),
22 layerDown(new QToolButton), list(new QListWidget)
24 QListWidgetItem * qlwi = new QListWidgetItem(list);
25 LayerItemWidget * liw = new LayerItemWidget("Background", false, false, qlwi);
26 list->setItemWidget(qlwi, liw);
28 addLayer->setIcon(QIcon(":/res/layer-add.png"));
29 removeLayer->setIcon(QIcon(":/res/layer-delete.png"));
30 editLayer->setIcon(QIcon(":/res/layer-edit.png"));
31 layerUp->setIcon(QIcon(":/res/layer-up.png"));
32 layerDown->setIcon(QIcon(":/res/layer-down.png"));
34 addLayer->setToolTip(tr("Add layer"));
35 removeLayer->setToolTip(tr("Remove layer"));
36 editLayer->setToolTip(tr("Edit layer"));
37 layerUp->setToolTip(tr("Move layer up"));
38 layerDown->setToolTip(tr("Move layer down"));
40 QHBoxLayout * hbox1 = new QHBoxLayout;
41 hbox1->addWidget(addLayer);
42 hbox1->addWidget(removeLayer);
43 hbox1->addWidget(editLayer);
44 hbox1->addWidget(layerUp);
45 hbox1->addWidget(layerDown);
48 QVBoxLayout * mainLayout = new QVBoxLayout;
49 mainLayout->addWidget(list);
50 mainLayout->addLayout(hbox1);
52 setLayout(mainLayout);
54 connect(list, SIGNAL(currentRowChanged(int)), this, SLOT(HandleLayerSelected(int)));
55 connect(list, SIGNAL(itemDoubleClicked(QListWidgetItem *)), this, SLOT(HandleDblClick(QListWidgetItem *)));
56 connect(addLayer, SIGNAL(clicked()), this, SLOT(AddLayer()));
57 connect(removeLayer, SIGNAL(clicked()), this, SLOT(DeleteLayer()));
58 connect(editLayer, SIGNAL(clicked()), this, SLOT(EditLayer()));
59 connect(layerUp, SIGNAL(clicked()), this, SLOT(MoveLayerUp()));
60 connect(layerDown, SIGNAL(clicked()), this, SLOT(MoveLayerDown()));
62 connect(liw, SIGNAL(HideToggled(QListWidgetItem *, bool)), this, SLOT(HandleHideToggle(QListWidgetItem *, bool)));
63 connect(liw, SIGNAL(LockToggled(QListWidgetItem *, bool)), this, SLOT(HandleLockToggle(QListWidgetItem *, bool)));
65 list->setCurrentRow(0);
67 // We set global variables here, since we are 'in charge' of them (mostly)
68 Global::activeLayer = 0;
69 Global::numLayers = 1;
70 Global::layerHidden.clear();
71 Global::layerLocked.clear();
72 Global::layerName.clear();
73 Global::layerHidden.push_back(false);
74 Global::layerLocked.push_back(false);
75 Global::layerName.push_back("Background");
79 LayerWidget::~LayerWidget()
84 void LayerWidget::Reload(void)
88 for(int i=0; i<Global::numLayers; i++)
90 QListWidgetItem * qlwi = new QListWidgetItem();
91 LayerItemWidget * liw = new LayerItemWidget(Global::layerName[i].c_str(), Global::layerHidden[i], Global::layerLocked[i], qlwi);
92 list->insertItem(0, qlwi);
93 list->setItemWidget(qlwi, liw);
95 // Set up SIGNAL/SLOTs for this LayerItemWidget
96 connect(liw, SIGNAL(HideToggled(QListWidgetItem *, bool)), this, SLOT(HandleHideToggle(QListWidgetItem *, bool)));
97 connect(liw, SIGNAL(LockToggled(QListWidgetItem *, bool)), this, SLOT(HandleLockToggle(QListWidgetItem *, bool)));
100 int layer = (Global::numLayers - Global::activeLayer) - 1;
101 list->setCurrentRow(layer, QItemSelectionModel::SelectCurrent);
106 void LayerWidget::HandleLayerSelected(int currentRow)
108 // If LayerWidget is empty, bail out
109 if (currentRow == -1)
112 // This is numbered opposite of how it's presented. In other words, the
113 // bottom of the list is 0, and items above it count upwards. So like this:
119 // which is the opposite of the internal numbering.
120 Global::activeLayer = (Global::numLayers - currentRow) - 1;
122 // Set button states to sane values
128 // What happens here is that for every QListWidgetItem we make, we connect it
129 // to these handlers. But we only have to worry about that when adding and
130 // moving a layer. However, when toggling states, we need to toggle the global
131 // state variables too.
133 void LayerWidget::HandleHideToggle(QListWidgetItem * qlwi, bool state)
135 int currentRow = list->row(qlwi);
136 int layer = (Global::numLayers - currentRow) - 1;
137 std::vector<bool>::iterator i = Global::layerHidden.begin() + layer;
139 //printf("Item #%i, new hide state is %s\n", currentRow, (state ? "ON" : "off"));
140 //printf("LayerWidget: New hide state of layer %i is %s.\n", layer, (state ? "ON" : "off"));
141 // We do this last, because otherwise the Document would get the wrong state
146 void LayerWidget::HandleLockToggle(QListWidgetItem * qlwi, bool state)
148 int currentRow = list->row(qlwi);
149 int layer = (Global::numLayers - currentRow) - 1;
150 std::vector<bool>::iterator i = Global::layerLocked.begin() + layer;
152 // printf("Item #%i, new lock state is %s\n", list->row(qlwi), (state ? "ON" : "off"));
156 void LayerWidget::HandleDblClick(QListWidgetItem * /*qlwi*/)
162 void LayerWidget::AddLayer(void)
164 // We always stick the newest layer at the top of the list (visually, the
165 // top of the list is the end, the bottom is the beginning)...
166 int count = list->count();
167 QString text = QString("Layer #%1").arg(count);
168 QListWidgetItem * qlwi = new QListWidgetItem();
169 LayerItemWidget * liw = new LayerItemWidget(text, false, false, qlwi);
170 list->insertItem(0, qlwi);
171 list->setItemWidget(qlwi, liw);
173 // Set up SIGNAL/SLOTs for this LayerItemWidget
174 connect(liw, SIGNAL(HideToggled(QListWidgetItem *, bool)), this, SLOT(HandleHideToggle(QListWidgetItem *, bool)));
175 connect(liw, SIGNAL(LockToggled(QListWidgetItem *, bool)), this, SLOT(HandleLockToggle(QListWidgetItem *, bool)));
179 // Fix up the global state
180 Global::layerHidden.push_back(false);
181 Global::layerLocked.push_back(false);
182 Global::layerName.push_back(text.toUtf8().data());
187 void LayerWidget::DeleteLayer(void)
189 int numItems = list->count();
194 // N.B.: This *must* go before the item removal because that causes
195 // HandleLayerSelected() to be fired off which causes the numbers to
196 // be off. You have been warned!
197 // Tell the DrawingView to delete this layer in its Container:
198 emit LayerDeleted(Global::activeLayer);
200 int currentRow = list->currentRow();
201 QListWidgetItem * qlwi = list->currentItem();
202 list->removeItemWidget(qlwi);
207 // Fix up the global state
208 int layer = (Global::numLayers - currentRow) - 1;
209 Global::layerHidden.erase(Global::layerHidden.begin() + layer);
210 Global::layerLocked.erase(Global::layerLocked.begin() + layer);
211 Global::layerName.erase(Global::layerName.begin() + layer);
214 // If we're deleting from the top of the list, we have to decrement the
215 // active layer # by 1 (since we count upward from the bottom of the list).
217 Global::activeLayer--;
221 void LayerWidget::EditLayer(void)
223 // Get the LayerItemWidget so we can edit it (its name, anyway)...
224 QListWidgetItem * qlwi = list->currentItem();
225 LayerItemWidget * li = (LayerItemWidget *)list->itemWidget(qlwi);
226 QString s = li->name->text();
229 QString result = QInputDialog::getText(this, tr("Edit Layer Name"), tr("Layer Name:"), QLineEdit::Normal, s, &ok);
231 if (ok && !result.isEmpty())
233 li->name->setText(result);
235 int layer = (Global::numLayers - Global::activeLayer) - 1;
236 std::vector<std::string>::iterator i = Global::layerName.begin() + layer;
237 (*i) = result.toUtf8().data();
242 void LayerWidget::MoveLayerUp(void)
244 // Get information out of the LayerItemWidget (& get it from the list!)
245 int currentRow = list->currentRow();
246 QListWidgetItem * qlwi = list->currentItem();
247 LayerItemWidget * li = (LayerItemWidget *)list->itemWidget(qlwi);
248 QString s = li->name->text();
249 bool visible = li->invisible->isChecked();
250 bool editible = li->locked->isChecked();
252 // We have to make a new LayerItemWidget because it destroys the old one!
253 list->takeItem(currentRow);
254 list->insertItem(currentRow - 1, qlwi);
255 li = new LayerItemWidget(s, visible, editible, qlwi);
256 list->setItemWidget(qlwi, li);
257 list->setCurrentItem(qlwi);
259 // Set up SIGNAL/SLOTs for this LayerItemWidget
260 connect(li, SIGNAL(HideToggled(QListWidgetItem *, bool)), this, SLOT(HandleHideToggle(QListWidgetItem *, bool)));
261 connect(li, SIGNAL(LockToggled(QListWidgetItem *, bool)), this, SLOT(HandleLockToggle(QListWidgetItem *, bool)));
263 // Fix up the global state...
264 // N.B.: Because we handle the button states correctly, we should never
265 // have a situation where the reference in the vector is bad.
266 int layer = (Global::numLayers - currentRow) - 1;
267 bool old = Global::layerHidden[layer];
268 Global::layerHidden[layer] = Global::layerHidden[layer + 1];
269 Global::layerHidden[layer + 1] = old;
270 old = Global::layerLocked[layer];
271 Global::layerLocked[layer] = Global::layerLocked[layer + 1];
272 Global::layerLocked[layer + 1] = old;
273 std::string oldStr = Global::layerName[layer];
274 Global::layerName[layer] = Global::layerName[layer + 1];
275 Global::layerName[layer + 1] = oldStr;
276 // We also have to tell the document to shuffle its layers too
277 emit LayersSwapped(layer, layer + 1);
281 void LayerWidget::MoveLayerDown(void)
283 // Get information out of the LayerItemWidget (& get it from the list!)
284 int currentRow = list->currentRow();
285 QListWidgetItem * qlwi = list->currentItem();
286 LayerItemWidget * li = (LayerItemWidget *)list->itemWidget(qlwi);
287 QString s = li->name->text();
288 bool visible = li->invisible->isChecked();
289 bool editible = li->locked->isChecked();
291 // We have to make a new LayerItemWidget because it destroys the old one!
292 list->takeItem(currentRow);
293 list->insertItem(currentRow + 1, qlwi);
294 li = new LayerItemWidget(s, visible, editible, qlwi);
295 list->setItemWidget(qlwi, li);
296 list->setCurrentItem(qlwi);
298 // Set up SIGNAL/SLOTs for this LayerItemWidget
299 connect(li, SIGNAL(HideToggled(QListWidgetItem *, bool)), this, SLOT(HandleHideToggle(QListWidgetItem *, bool)));
300 connect(li, SIGNAL(LockToggled(QListWidgetItem *, bool)), this, SLOT(HandleLockToggle(QListWidgetItem *, bool)));
302 // Fix up the global state...
303 // N.B.: Because we handle the button states correctly, we should never
304 // have a situation where the reference in the vector is bad.
305 int layer = (Global::numLayers - currentRow) - 1;
306 bool old = Global::layerHidden[layer];
307 Global::layerHidden[layer] = Global::layerHidden[layer - 1];
308 Global::layerHidden[layer - 1] = old;
309 old = Global::layerLocked[layer];
310 Global::layerLocked[layer] = Global::layerLocked[layer - 1];
311 Global::layerLocked[layer - 1] = old;
312 std::string oldStr = Global::layerName[layer];
313 Global::layerName[layer] = Global::layerName[layer - 1];
314 Global::layerName[layer - 1] = oldStr;
315 // We also have to tell the document to shuffle its layers too
316 emit LayersSwapped(layer, layer - 1);
321 // Set button states in this widget to sane values
323 void LayerWidget::SetButtonStates(void)
325 int numItems = list->count();
326 int currentRow = list->currentRow();
328 layerDown->setEnabled(currentRow == (numItems - 1) ? false : true);
329 layerUp->setEnabled(currentRow == 0 ? false : true);
330 removeLayer->setEnabled(numItems == 1 ? false : true);