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::layerHidden.push_back(false);
73 Global::layerLocked.push_back(false);
77 LayerWidget::~LayerWidget()
82 void LayerWidget::HandleLayerSelected(int currentRow)
84 //printf("LayerWidget::HandleLayerSelected(): currentRow = %i\n", currentRow);
85 // emit(LayerSelected(currentRow));
87 // This is numbered opposite of how it's presented. In other words, the
88 // bottom of the list is 0, and items above it count upwards. So like this:
94 // which is the opposite of the internal numbering.
95 Global::activeLayer = (Global::numLayers - currentRow) - 1;
96 //printf("LayerWidget::HandleLayerSelected(): currentRow = %i, numLayers = %i, active = %i\n", currentRow, Global::numLayers, Global::activeLayer);
97 // Set button states to sane values
103 // What happens here is that for every QListWidgetItem we make, we connect it
104 // to these handlers. But we only have to worry about that when adding and
105 // moving a layer. However, when toggling states, we need to toggle the global
106 // state variables too.
108 void LayerWidget::HandleHideToggle(QListWidgetItem * qlwi, bool state)
110 int currentRow = list->row(qlwi);
111 int layer = (Global::numLayers - currentRow) - 1;
112 std::vector<bool>::iterator i = Global::layerHidden.begin() + layer;
114 //printf("Item #%i, new hide state is %s\n", currentRow, (state ? "ON" : "off"));
115 //printf("LayerWidget: New hide state of layer %i is %s.\n", layer, (state ? "ON" : "off"));
116 // We do this last, because otherwise the Document would get the wrong state
117 emit(LayerToggled());
121 void LayerWidget::HandleLockToggle(QListWidgetItem * qlwi, bool state)
123 int currentRow = list->row(qlwi);
124 int layer = (Global::numLayers - currentRow) - 1;
125 std::vector<bool>::iterator i = Global::layerLocked.begin() + layer;
127 // printf("Item #%i, new lock state is %s\n", list->row(qlwi), (state ? "ON" : "off"));
131 void LayerWidget::HandleDblClick(QListWidgetItem * /*qlwi*/)
137 void LayerWidget::AddLayer(void)
139 // We always stick the newest layer at the top of the list...
140 int count = list->count();
141 QString text = QString("Layer #%1").arg(count);
142 QListWidgetItem * qlwi = new QListWidgetItem();
143 LayerItemWidget * liw = new LayerItemWidget(text, false, false, qlwi);
144 list->insertItem(0, qlwi);
145 list->setItemWidget(qlwi, liw);
147 // Set up SIGNAL/SLOTs for this LayerItemWidget
148 connect(liw, SIGNAL(HideToggled(QListWidgetItem *, bool)), this, SLOT(HandleHideToggle(QListWidgetItem *, bool)));
149 connect(liw, SIGNAL(LockToggled(QListWidgetItem *, bool)), this, SLOT(HandleLockToggle(QListWidgetItem *, bool)));
153 // Fix up the global state
154 Global::layerHidden.insert(Global::layerHidden.begin(), false);
155 Global::layerLocked.insert(Global::layerLocked.begin(), false);
160 void LayerWidget::DeleteLayer(void)
162 int numItems = list->count();
167 // N.B.: This *must* go before the item removal because that causes
168 // HandleLayerSelected() to be fired off which causes the numbers to
169 // be off. You have been warned!
170 // Tell the DrawingView to delete this layer in its Container:
171 emit(LayerDeleted(Global::activeLayer));
173 int currentRow = list->currentRow();
174 QListWidgetItem * qlwi = list->currentItem();
175 list->removeItemWidget(qlwi);
180 // Fix up the global state
181 int layer = (Global::numLayers - currentRow) - 1;
182 Global::layerHidden.erase(Global::layerHidden.begin() + layer);
183 Global::layerLocked.erase(Global::layerLocked.begin() + layer);
186 // If we're deleting from the top of the list, we have to decrement the
187 // active layer # by 1 (since we count upward from the bottom of the list).
189 Global::activeLayer--;
193 void LayerWidget::EditLayer(void)
195 // Get the LayerItemWidget so we can edit it (its name, anyway)...
196 QListWidgetItem * qlwi = list->currentItem();
197 LayerItemWidget * li = (LayerItemWidget *)list->itemWidget(qlwi);
198 QString s = li->name->text();
201 QString result = QInputDialog::getText(this, tr("Edit Layer Name"), tr("Layer Name:"), QLineEdit::Normal, s, &ok);
203 if (ok && !result.isEmpty())
204 li->name->setText(result);
208 void LayerWidget::MoveLayerUp(void)
210 // Get information out of the LayerItemWidget (& get it from the list!)
211 int currentRow = list->currentRow();
212 QListWidgetItem * qlwi = list->currentItem();
213 LayerItemWidget * li = (LayerItemWidget *)list->itemWidget(qlwi);
214 QString s = li->name->text();
215 bool visible = li->invisible->isChecked();
216 bool editible = li->locked->isChecked();
218 // We have to make a new LayerItemWidget because it destroys the old one!
219 list->takeItem(currentRow);
220 list->insertItem(currentRow - 1, qlwi);
221 li = new LayerItemWidget(s, visible, editible, qlwi);
222 list->setItemWidget(qlwi, li);
223 list->setCurrentItem(qlwi);
225 // Set up SIGNAL/SLOTs for this LayerItemWidget
226 connect(li, SIGNAL(HideToggled(QListWidgetItem *, bool)), this, SLOT(HandleHideToggle(QListWidgetItem *, bool)));
227 connect(li, SIGNAL(LockToggled(QListWidgetItem *, bool)), this, SLOT(HandleLockToggle(QListWidgetItem *, bool)));
229 // Fix up the global state...
230 // N.B.: Because we handle the button states correctly, we should never
231 // have a situation where the reference in the vector is bad.
232 int layer = (Global::numLayers - currentRow) - 1;
233 bool old = Global::layerHidden[layer];
234 Global::layerHidden[layer] = Global::layerHidden[layer + 1];
235 Global::layerHidden[layer + 1] = old;
236 old = Global::layerLocked[layer];
237 Global::layerLocked[layer] = Global::layerLocked[layer + 1];
238 Global::layerLocked[layer + 1] = old;
239 // We also have to tell the document to shuffle its layers too
240 emit(LayersSwapped(layer, layer + 1));
244 void LayerWidget::MoveLayerDown(void)
246 // Get information out of the LayerItemWidget (& get it from the list!)
247 int currentRow = list->currentRow();
248 QListWidgetItem * qlwi = list->currentItem();
249 LayerItemWidget * li = (LayerItemWidget *)list->itemWidget(qlwi);
250 QString s = li->name->text();
251 bool visible = li->invisible->isChecked();
252 bool editible = li->locked->isChecked();
254 // We have to make a new LayerItemWidget because it destroys the old one!
255 list->takeItem(currentRow);
256 list->insertItem(currentRow + 1, qlwi);
257 li = new LayerItemWidget(s, visible, editible, qlwi);
258 list->setItemWidget(qlwi, li);
259 list->setCurrentItem(qlwi);
261 // Set up SIGNAL/SLOTs for this LayerItemWidget
262 connect(li, SIGNAL(HideToggled(QListWidgetItem *, bool)), this, SLOT(HandleHideToggle(QListWidgetItem *, bool)));
263 connect(li, SIGNAL(LockToggled(QListWidgetItem *, bool)), this, SLOT(HandleLockToggle(QListWidgetItem *, bool)));
265 // Fix up the global state...
266 // N.B.: Because we handle the button states correctly, we should never
267 // have a situation where the reference in the vector is bad.
268 int layer = (Global::numLayers - currentRow) - 1;
269 bool old = Global::layerHidden[layer];
270 Global::layerHidden[layer] = Global::layerHidden[layer - 1];
271 Global::layerHidden[layer - 1] = old;
272 old = Global::layerLocked[layer];
273 Global::layerLocked[layer] = Global::layerLocked[layer - 1];
274 Global::layerLocked[layer - 1] = old;
275 // We also have to tell the document to shuffle its layers too
276 emit(LayersSwapped(layer, layer - 1));
281 // Set button states in this widget to sane values
283 void LayerWidget::SetButtonStates(void)
285 int numItems = list->count();
286 int currentRow = list->currentRow();
288 layerDown->setEnabled(currentRow == (numItems - 1) ? false : true);
289 layerUp->setEnabled(currentRow == 0 ? false : true);
290 removeLayer->setEnabled(numItems == 1 ? false : true);