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1 " |
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2 COPYRIGHT (c) 1989-93 by Claus Gittinger |
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3 All Rights Reserved |
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4 |
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5 This software is furnished under a license and may be used |
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6 only in accordance with the terms of that license and with the |
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7 inclusion of the above copyright notice. This software may not |
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8 be provided or otherwise made available to, or used by, any |
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9 other person. No title to or ownership of the software is |
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10 hereby transferred. |
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11 " |
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12 |
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13 View subclass:#ScrollableView |
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14 instanceVariableNames:'scrolledView scrollBar helpView innerMargin' |
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15 classVariableNames:'' |
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16 poolDictionaries:'' |
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17 category:'Views-Basic' |
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18 ! |
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19 |
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20 ScrollableView comment:' |
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21 |
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22 COPYRIGHT (c) 1989-93 by Claus Gittinger |
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23 All Rights Reserved |
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24 a view containing a scrollbar and some other (slave-)view |
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25 |
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26 %W% %E% |
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27 |
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28 written spring 89 by claus |
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29 '! |
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30 |
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31 !ScrollableView class methodsFor:'instance creation'! |
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32 |
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33 in:aView |
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34 ^ self for:nil in:aView |
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35 ! |
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36 |
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37 for:aViewClass |
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38 ^ self for:aViewClass in:nil |
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39 ! |
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40 |
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41 for:aViewClass in:aView |
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42 |newView| |
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43 |
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44 newView := self basicNew. |
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45 aView notNil ifTrue:[ |
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46 newView device:(aView device). |
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47 aView addSubView:newView |
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48 ] ifFalse:[ |
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49 newView device:Display |
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50 ]. |
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51 newView initializeFor:aViewClass. |
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52 ^ newView |
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53 ! ! |
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54 |
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55 !ScrollableView methodsFor:'initialization'! |
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56 |
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57 initialize |
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58 ^ self initializeFor:nil |
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59 ! |
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60 |
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61 initializeFor:aViewClass |
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62 |negativeOffset twoMargins halfMargin| |
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63 |
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64 super initialize. |
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65 |
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66 innerMargin := ViewSpacing. |
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67 negativeOffset := borderWidth negated. |
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68 |
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69 "create the scrollbar" |
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70 |
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71 scrollBar := ScrollBar in:self. |
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72 scrollBar thumbOrigin:0 thumbHeight:100. |
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73 scrollBar scrollAction:[:position | |
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74 scrolledView scrollVerticalToPercent:position |
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75 ]. |
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76 scrollBar scrollUpAction:[scrolledView scrollUp]. |
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77 scrollBar scrollDownAction:[scrolledView scrollDown]. |
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78 |
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79 "create the subview" |
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80 self is3D ifTrue:[ |
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81 twoMargins := innerMargin * 2. |
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82 halfMargin := innerMargin // 2. |
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83 |
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84 scrollBar origin:(halfMargin @ halfMargin) |
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85 extent:[scrollBar extent x @ (height - innerMargin)]. |
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86 |
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87 helpView := View in:self. |
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88 helpView origin:((scrollBar origin x + scrollBar width + innerMargin) |
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89 @ |
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90 halfMargin) |
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91 extent:[(width - scrollBar width - twoMargins) @ (height - innerMargin)]. |
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92 |
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93 aViewClass notNil ifTrue:[ |
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94 scrolledView := aViewClass in:helpView. |
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95 scrolledView origin:(helpView level abs @ helpView level abs) |
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96 extent:[(helpView width - helpView level abs - helpView level abs) |
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97 @ |
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98 (helpView height - helpView level abs - helpView level abs)]. |
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99 helpView viewBackground:(scrolledView viewBackground). |
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100 scrolledView level:-1 |
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101 ] |
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102 ] ifFalse:[ |
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103 (style == #mswindows) ifTrue:[ |
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104 scrollBar origin:[width - scrollBar extent x |
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105 - scrollBar borderWidth |
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106 @ |
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107 negativeOffset] |
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108 ] ifFalse:[ |
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109 scrollBar origin:(negativeOffset @ negativeOffset) |
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110 ]. |
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111 scrollBar extent:[scrollBar extent x @ (height "+ (scrollBar borderWidth * 1)")]. |
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112 |
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113 aViewClass notNil ifTrue:[ |
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114 scrolledView := aViewClass in:self. |
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115 (style == #mswindows) ifTrue:[ |
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116 scrolledView origin:scrolledView borderWidth negated |
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117 @ |
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118 scrolledView borderWidth negated |
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119 ] ifFalse:[ |
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120 scrolledView origin:((scrollBar width + scrollBar borderWidth |
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121 - scrolledView borderWidth) |
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122 @ |
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123 scrolledView borderWidth negated) |
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124 ]. |
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125 scrolledView extent:[(width - scrollBar width |
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126 - scrolledView borderWidth) |
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127 @ |
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128 (height + (scrollBar borderWidth)) |
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129 ] |
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130 ]. |
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131 ]. |
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132 scrolledView notNil ifTrue:[ |
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133 scrolledView |
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134 originChangeAction:[:aView | scrollBar setThumbOriginFor:aView]. |
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135 scrolledView |
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136 contentsChangeAction:[:aView | scrollBar setThumbFor:aView] |
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137 ] |
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138 ! |
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139 |
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140 realize |
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141 super realize. |
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142 "since scrolledview may have done something to its contents |
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143 during init-time we had no chance yet to catch contents- |
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144 changes; do it now |
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145 " |
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146 scrollBar setThumbFor:scrolledView |
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147 ! ! |
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148 |
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149 !ScrollableView methodsFor:'accessing'! |
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150 |
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151 scrollBar |
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152 "return the scrollbar" |
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153 |
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154 ^ scrollBar |
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155 ! |
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156 |
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157 scrolledView |
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158 "return the scrolled view" |
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159 |
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160 ^ scrolledView |
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161 ! |
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162 |
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163 scrolledView:aView |
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164 |m m2 b| |
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165 |
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166 scrolledView notNil ifTrue:[ |
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167 self error:'can only scroll one view' |
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168 ]. |
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169 scrolledView := aView. |
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170 |
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171 b := scrolledView borderWidth. |
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172 self is3D ifTrue:[ |
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173 m := helpView margin. |
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174 m2 := m * 2. |
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175 |
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176 helpView addSubView:scrolledView. |
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177 scrolledView origin:(m @ m) |
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178 extent:[(helpView width - m2) @ (helpView height - m2)]. |
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179 scrolledView superViewChangedSize. |
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180 helpView viewBackground:(scrolledView viewBackground). |
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181 scrolledView level:-1 |
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182 ] ifFalse:[ |
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183 self addSubView:scrolledView. |
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184 scrolledView origin:((scrollBar width + scrollBar borderWidth - b) @ b negated) |
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185 extent:[(width - scrollBar width - b) @ (height + scrollBar borderWidth) |
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186 ]. |
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187 scrolledView superViewChangedSize. |
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188 ]. |
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189 scrolledView |
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190 originChangeAction:[:aView | scrollBar setThumbOriginFor:aView]. |
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191 scrolledView |
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192 contentsChangeAction:[:aView | scrollBar setThumbFor:aView]. |
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193 |
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194 realized ifTrue:[scrolledView realize] |
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195 ! ! |
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196 |
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197 !ScrollableView methodsFor:'slave-view messages'! |
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198 |
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199 cursor |
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200 scrolledView isNil ifTrue:[ |
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201 ^ super cursor |
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202 ]. |
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203 ^ scrolledView cursor |
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204 ! |
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205 |
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206 cursor:aCursor |
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207 "I have the same cursor as my scrolledView" |
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208 |
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209 scrolledView cursor:aCursor. |
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210 super cursor:aCursor |
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211 ! |
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212 |
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213 leftButtonMenu |
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214 ^ scrolledView leftButtonMenu |
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215 ! |
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216 |
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217 leftButtonMenu:aMenu |
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218 "pass on leftbuttonmenu to scrolledView" |
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219 |
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220 scrolledView leftButtonMenu:aMenu |
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221 ! |
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222 |
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223 middleButtonMenu |
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224 ^ scrolledView middleButtonMenu |
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225 ! |
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226 |
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227 middleButtonMenu:aMenu |
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228 "pass on middlebuttonmenu to scrolledView" |
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229 |
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230 scrolledView middleButtonMenu:aMenu |
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231 ! |
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232 |
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233 rightButtonMenu |
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234 ^ scrolledView rightButtonMenu |
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235 ! |
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236 |
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237 rightButtonMenu:aMenu |
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238 "pass on rightbuttonmenu to scrolledView" |
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239 |
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240 scrolledView rightButtonMenu:aMenu |
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241 ! |
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242 |
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243 doesNotUnderstand:aMessage |
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244 "this is funny: all message we do not understand, are passed |
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245 on to the scrolledView - so we do not have to care for all |
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246 possible messages ...(thanks to the Message class)" |
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247 |
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248 scrolledView isNil ifFalse:[ |
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249 ^ scrolledView perform:(aMessage selector) |
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250 withArguments:(aMessage arguments) |
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251 ] |
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252 ! ! |
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253 |
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254 !ScrollableView methodsFor:'event processing'! |
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255 |
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256 sizeChanged:how |
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257 super sizeChanged:how. |
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258 scrollBar setThumbFor:scrolledView |
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259 ! ! |