1 /* 2 * Copyright 2006-2007, Haiku Inc. All rights reserved. 3 * Distributed under the terms of the MIT License. 4 * 5 * Authors: 6 * Stephan Aßmus <superstippi@gmx.de> 7 */ 8 9 #include "IconObjectListView.h" 10 11 #include <new> 12 #include <stdio.h> 13 #include <string.h> 14 15 #include "CommandStack.h" 16 #include "IconObject.h" 17 #include "Property.h" 18 #include "PropertyObject.h" 19 #include "Selection.h" 20 #include "SetPropertiesCommand.h" 21 22 using std::nothrow; 23 24 // constructor 25 IconObjectListView::IconObjectListView() 26 : PropertyListView(), 27 28 fSelection(NULL), 29 fCommandStack(NULL), 30 fObject(NULL), 31 fIgnoreObjectChange(false) 32 { 33 } 34 35 // destructor 36 IconObjectListView::~IconObjectListView() 37 { 38 SetSelection(NULL); 39 _SetObject(NULL); 40 } 41 42 // Draw 43 void 44 IconObjectListView::Draw(BRect updateRect) 45 { 46 PropertyListView::Draw(updateRect); 47 48 if (fObject) 49 return; 50 51 // display helpful messages 52 const char* message1 = "Click on an object in"; 53 const char* message2 = "any of the other lists to"; 54 const char* message3 = "edit it's properties here."; 55 56 SetHighColor(tint_color(LowColor(), B_DARKEN_2_TINT)); 57 font_height fh; 58 GetFontHeight(&fh); 59 BRect b(Bounds()); 60 61 BPoint middle; 62 float textHeight = (fh.ascent + fh.descent) * 1.5; 63 middle.y = (b.top + b.bottom) / 2.0 - textHeight; 64 middle.x = (b.left + b.right - StringWidth(message1)) / 2.0; 65 DrawString(message1, middle); 66 67 middle.y += textHeight; 68 middle.x = (b.left + b.right - StringWidth(message2)) / 2.0; 69 DrawString(message2, middle); 70 71 middle.y += textHeight; 72 middle.x = (b.left + b.right - StringWidth(message3)) / 2.0; 73 DrawString(message3, middle); 74 } 75 76 // PropertyChanged 77 void 78 IconObjectListView::PropertyChanged(const Property* previous, 79 const Property* current) 80 { 81 if (!fCommandStack || !fObject) 82 return; 83 84 PropertyObject* oldObject = new (nothrow) PropertyObject(); 85 if (oldObject) 86 oldObject->AddProperty(previous->Clone()); 87 88 PropertyObject* newObject = new (nothrow) PropertyObject(); 89 if (newObject) 90 newObject->AddProperty(current->Clone()); 91 92 IconObject** objects = new (nothrow) IconObject*[1]; 93 if (objects) 94 objects[0] = fObject; 95 96 Command* command = new (nothrow) SetPropertiesCommand(objects, 1, 97 oldObject, 98 newObject); 99 fIgnoreObjectChange = true; 100 fCommandStack->Perform(command); 101 fIgnoreObjectChange = false; 102 } 103 104 // PasteProperties 105 void 106 IconObjectListView::PasteProperties(const PropertyObject* object) 107 { 108 // TODO: command for this 109 if (fObject) 110 fObject->SetToPropertyObject(object); 111 112 PropertyListView::PasteProperties(object); 113 } 114 115 // IsEditingMultipleObjects 116 bool 117 IconObjectListView::IsEditingMultipleObjects() 118 { 119 return false; 120 } 121 122 // #pragma mark - 123 124 // ObjectChanged 125 void 126 IconObjectListView::ObjectChanged(const Observable* object) 127 { 128 if (object == fSelection) { 129 Selectable* selected = fSelection->SelectableAt(0); 130 _SetObject(dynamic_cast<IconObject*>(selected)); 131 } 132 133 if (object == fObject/* && !fIgnoreObjectChange*/) { 134 //printf("IconObjectListView::ObjectChanged(fObject)\n"); 135 SetTo(fObject->MakePropertyObject()); 136 } 137 } 138 139 // #pragma mark - 140 141 // SetSelection 142 void 143 IconObjectListView::SetSelection(Selection* selection) 144 { 145 if (fSelection == selection) 146 return; 147 148 if (fSelection) 149 fSelection->RemoveObserver(this); 150 151 fSelection = selection; 152 153 if (fSelection) 154 fSelection->AddObserver(this); 155 } 156 157 // SetCommandStack 158 void 159 IconObjectListView::SetCommandStack(CommandStack* stack) 160 { 161 fCommandStack = stack; 162 } 163 164 // #pragma mark - 165 166 // _SetObject 167 void 168 IconObjectListView::_SetObject(IconObject* object) 169 { 170 if (fObject == object) 171 return; 172 173 if (fObject) { 174 fObject->RemoveObserver(this); 175 fObject->Release(); 176 } 177 178 fObject = object; 179 PropertyObject* propertyObject = NULL; 180 181 if (fObject) { 182 fObject->Acquire(); 183 fObject->AddObserver(this); 184 propertyObject = fObject->MakePropertyObject(); 185 } 186 187 SetTo(propertyObject); 188 } 189 190