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11 package org.eclipse.swt.custom;
12
13 import org.eclipse.swt.*;
14 import org.eclipse.swt.graphics.*;
15 import org.eclipse.swt.widgets.*;
16
17
22 class CBannerLayout extends Layout {
23
24 protected Point computeSize(Composite composite, int wHint, int hHint, boolean flushCache) {
25 CBanner banner = (CBanner)composite;
26 Control left = banner.left;
27 Control right = banner.right;
28 Control bottom = banner.bottom;
29 boolean showCurve = left != null && right != null;
30 int height = hHint;
31 int width = wHint;
32
33 Point bottomSize = new Point(0, 0);
35 if (bottom != null) {
36 int trim = computeTrim(bottom);
37 int w = wHint == SWT.DEFAULT ? SWT.DEFAULT : Math.max(0, width - trim);
38 bottomSize = computeChildSize(bottom, w, SWT.DEFAULT, flushCache);
39 }
40 Point rightSize = new Point(0, 0);
41 if (right != null) {
42 int trim = computeTrim(right);
43 int w = SWT.DEFAULT;
44 if (banner.rightWidth != SWT.DEFAULT) {
45 w = banner.rightWidth - trim;
46 if (left != null) {
47 w = Math.min(w, width - banner.curve_width + 2* banner.curve_indent - CBanner.MIN_LEFT - trim);
48 }
49 w = Math.max(0, w);
50 }
51 rightSize = computeChildSize(right, w, SWT.DEFAULT, flushCache);
52 if (wHint != SWT.DEFAULT) {
53 width -= rightSize.x + banner.curve_width - 2* banner.curve_indent;
54 }
55 }
56 Point leftSize = new Point(0, 0);
57 if (left != null) {
58 int trim = computeTrim(left);
59 int w = wHint == SWT.DEFAULT ? SWT.DEFAULT : Math.max(0, width - trim);
60 leftSize = computeChildSize(left, w, SWT.DEFAULT, flushCache);
61 }
62
63 width = leftSize.x + rightSize.x;
65 height = bottomSize.y;
66 if (bottom != null && (left != null || right != null)) {
67 height += CBanner.BORDER_STRIPE + 2;
68 }
69 if (left != null) {
70 if (right == null) {
71 height += leftSize.y;
72 } else {
73 height += Math.max(leftSize.y, banner.rightMinHeight == SWT.DEFAULT ? rightSize.y : banner.rightMinHeight);
74 }
75 } else {
76 height += rightSize.y;
77 }
78 if (showCurve) {
79 width += banner.curve_width - 2*banner.curve_indent;
80 height += CBanner.BORDER_TOP + CBanner.BORDER_BOTTOM + 2*CBanner.BORDER_STRIPE;
81 }
82
83 if (wHint != SWT.DEFAULT) width = wHint;
84 if (hHint != SWT.DEFAULT) height = hHint;
85
86 return new Point(width, height);
87 }
88 Point computeChildSize(Control control, int wHint, int hHint, boolean flushCache) {
89 Object  data = control.getLayoutData();
90 if (data == null || !(data instanceof CLayoutData)) {
91 data = new CLayoutData();
92 control.setLayoutData(data);
93 }
94 return ((CLayoutData)data).computeSize(control, wHint, hHint, flushCache);
95 }
96 int computeTrim(Control c) {
97 if (c instanceof Scrollable) {
98 Rectangle rect = ((Scrollable) c).computeTrim (0, 0, 0, 0);
99 return rect.width;
100 }
101 return c.getBorderWidth () * 2;
102 }
103 protected boolean flushCache(Control control) {
104 Object data = control.getLayoutData();
105 if (data != null && data instanceof CLayoutData) ((CLayoutData)data).flushCache();
106 return true;
107 }
108 protected void layout(Composite composite, boolean flushCache) {
109 CBanner banner = (CBanner)composite;
110 Control left = banner.left;
111 Control right = banner.right;
112 Control bottom = banner.bottom;
113
114 Point size = banner.getSize();
115 boolean showCurve = left != null && right != null;
116 int width = size.x - 2*banner.getBorderWidth();
117 int height = size.y - 2*banner.getBorderWidth();
118
119 Point bottomSize = new Point(0, 0);
120 if (bottom != null) {
121 int trim = computeTrim(bottom);
122 int w = Math.max(0, width - trim);
123 bottomSize = computeChildSize(bottom, w, SWT.DEFAULT, flushCache);
124 height -= bottomSize.y + CBanner.BORDER_STRIPE + 2;
125 }
126 if (showCurve) height -= CBanner.BORDER_TOP + CBanner.BORDER_BOTTOM + 2*CBanner.BORDER_STRIPE;
127 height = Math.max(0, height);
128 Point rightSize = new Point(0,0);
129 if (right != null) {
130 int trim = computeTrim(right);
131 int w = SWT.DEFAULT;
132 if (banner.rightWidth != SWT.DEFAULT) {
133 w = banner.rightWidth - trim;
134 if (left != null) {
135 w = Math.min(w, width - banner.curve_width + 2* banner.curve_indent - CBanner.MIN_LEFT - trim);
136 }
137 w = Math.max(0, w);
138 }
139 rightSize = computeChildSize(right, w, SWT.DEFAULT, flushCache);
140 width = width - (rightSize.x - banner.curve_indent + banner.curve_width - banner.curve_indent);
141 }
142 Point leftSize = new Point(0, 0);
143 if (left != null) {
144 int trim = computeTrim(left);
145 int w = Math.max(0, width - trim);
146 leftSize = computeChildSize(left, w, SWT.DEFAULT, flushCache);
147 }
148
149 int x = 0;
150 int y = 0;
151 int oldStart = banner.curveStart;
152 Rectangle leftRect = null;
153 Rectangle rightRect = null;
154 Rectangle bottomRect = null;
155 if (bottom != null) {
156 bottomRect = new Rectangle(x, y+size.y-bottomSize.y, bottomSize.x, bottomSize.y);
157 }
158 if (showCurve) y += CBanner.BORDER_TOP + CBanner.BORDER_STRIPE;
159 if(left != null) {
160 leftRect = new Rectangle(x, y, leftSize.x, leftSize.y);
161 banner.curveStart = x + leftSize.x - banner.curve_indent;
162 x += leftSize.x - banner.curve_indent + banner.curve_width - banner.curve_indent;
163 }
164 if (right != null) {
165 if (left != null) {
166 rightSize.y = Math.max(leftSize.y, banner.rightMinHeight == SWT.DEFAULT ? rightSize.y : banner.rightMinHeight);
167 }
168 rightRect = new Rectangle(x, y, rightSize.x, rightSize.y);
169 }
170 if (banner.curveStart < oldStart) {
171 banner.redraw(banner.curveStart - CBanner.CURVE_TAIL, 0, oldStart + banner.curve_width - banner.curveStart + CBanner.CURVE_TAIL + 5, size.y, false);
172 }
173 if (banner.curveStart > oldStart) {
174 banner.redraw(oldStart - CBanner.CURVE_TAIL, 0, banner.curveStart + banner.curve_width - oldStart + CBanner.CURVE_TAIL + 5, size.y, false);
175 }
176
182 banner.update();
183 banner.curveRect = new Rectangle(banner.curveStart, 0, banner.curve_width, size.y);
184 if (bottomRect != null) bottom.setBounds(bottomRect);
185 if (rightRect != null) right.setBounds(rightRect);
186 if (leftRect != null) left.setBounds(leftRect);
187 }
188 }
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