179 int posBefore;
180 int posAfter;
181
182 posBefore = GetScrollPos(orient);
183 si.cbSize = sizeof(SCROLLINFO);
184 si.nMin = 0;
185 si.nMax = max;
186 si.fMask = SIF_RANGE;
187 if (disableNoScroll) {
188 si.fMask |= SIF_DISABLENOSCROLL;
189 }
190 if (page > 0) {
191 si.fMask |= SIF_PAGE;
192 si.nPage = page;
193 }
194 ::SetScrollInfo(GetHWnd(), orient, &si, TRUE);
195 // scroll position may have changed when thumb is at the end of the bar
196 // and the page size changes
197 posAfter = GetScrollPos(orient);
198 if (posBefore != posAfter) {
199 if(max==0 && posAfter==0) {
200 // Caller used nMin==nMax idiom to hide scrollbar.
201 // On the new themes (Windows XP, Vista) this would reset
202 // scroll position to zero ("just inside the range") (6404832).
203 //
204 PostScrollEvent(orient, SB_THUMBPOSITION, posBefore);
205 }else{
206 PostScrollEvent(orient, SB_THUMBPOSITION, posAfter);
207 }
208 }
209 }
210
211 void AwtScrollPane::RecalcSizes(int parentWidth, int parentHeight,
212 int childWidth, int childHeight)
213 {
214 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
215 if (env->EnsureLocalCapacity(2) < 0) {
216 return;
217 }
218
219 /* Determine border width without scrollbars. */
220 int horzBorder = ::GetSystemMetrics(SM_CXEDGE);;
221 int vertBorder = ::GetSystemMetrics(SM_CYEDGE);;
222
223 parentWidth -= (horzBorder * 2);
224 parentHeight -= (vertBorder * 2);
225
226 /* Enable each scrollbar as needed. */
227 jobject target = AwtObject::GetTarget(env);
228 jint policy = env->GetIntField(target,
246 * recalculate the horizontal metrics and scrollbar boolean.
247 */
248 if (!needsHorz) {
249 needsHorz = (policy == java_awt_ScrollPane_SCROLLBARS_ALWAYS ||
250 (policy == java_awt_ScrollPane_SCROLLBARS_AS_NEEDED &&
251 childWidth > parentWidth));
252 if (needsHorz) {
253 parentHeight -= ::GetSystemMetrics(SM_CYHSCROLL);
254 }
255 }
256
257 /* Now set ranges -- setting the min and max the same disables them. */
258 if (needsHorz) {
259 jobject hAdj =
260 env->GetObjectField(target, AwtScrollPane::hAdjustableID);
261 env->SetIntField(hAdj, AwtScrollPane::blockIncrementID, parentWidth);
262 SetScrollInfo(SB_HORZ, childWidth - 1, parentWidth,
263 (policy == java_awt_ScrollPane_SCROLLBARS_ALWAYS));
264 env->DeleteLocalRef(hAdj);
265 } else {
266 SetScrollInfo(SB_HORZ, 0, 0,
267 (policy == java_awt_ScrollPane_SCROLLBARS_ALWAYS));
268 }
269
270 if (needsVert) {
271 jobject vAdj =
272 env->GetObjectField(target, AwtScrollPane::vAdjustableID);
273 env->SetIntField(vAdj, AwtScrollPane::blockIncrementID, parentHeight);
274 SetScrollInfo(SB_VERT, childHeight - 1, parentHeight,
275 (policy == java_awt_ScrollPane_SCROLLBARS_ALWAYS));
276 env->DeleteLocalRef(vAdj);
277 } else {
278 SetScrollInfo(SB_VERT, 0, 0,
279 (policy == java_awt_ScrollPane_SCROLLBARS_ALWAYS));
280 }
281
282 env->DeleteLocalRef(target);
283 }
284
285 void AwtScrollPane::Reshape(int x, int y, int w, int h)
286 {
287 AwtComponent::Reshape(x, y, w, h);
288 }
289
290 void AwtScrollPane::Show(JNIEnv *env)
291 {
292 SetInsets(env);
293 SendMessage(WM_AWT_COMPONENT_SHOW);
294 }
295
296 void AwtScrollPane::PostScrollEvent(int orient, int scrollCode, int pos) {
297 if (scrollCode == SB_ENDSCROLL) {
298 return;
299 }
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179 int posBefore;
180 int posAfter;
181
182 posBefore = GetScrollPos(orient);
183 si.cbSize = sizeof(SCROLLINFO);
184 si.nMin = 0;
185 si.nMax = max;
186 si.fMask = SIF_RANGE;
187 if (disableNoScroll) {
188 si.fMask |= SIF_DISABLENOSCROLL;
189 }
190 if (page > 0) {
191 si.fMask |= SIF_PAGE;
192 si.nPage = page;
193 }
194 ::SetScrollInfo(GetHWnd(), orient, &si, TRUE);
195 // scroll position may have changed when thumb is at the end of the bar
196 // and the page size changes
197 posAfter = GetScrollPos(orient);
198 if (posBefore != posAfter) {
199 PostScrollEvent(orient, SB_THUMBPOSITION, posAfter);
200 }
201 }
202
203 void AwtScrollPane::RecalcSizes(int parentWidth, int parentHeight,
204 int childWidth, int childHeight)
205 {
206 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
207 if (env->EnsureLocalCapacity(2) < 0) {
208 return;
209 }
210
211 /* Determine border width without scrollbars. */
212 int horzBorder = ::GetSystemMetrics(SM_CXEDGE);;
213 int vertBorder = ::GetSystemMetrics(SM_CYEDGE);;
214
215 parentWidth -= (horzBorder * 2);
216 parentHeight -= (vertBorder * 2);
217
218 /* Enable each scrollbar as needed. */
219 jobject target = AwtObject::GetTarget(env);
220 jint policy = env->GetIntField(target,
238 * recalculate the horizontal metrics and scrollbar boolean.
239 */
240 if (!needsHorz) {
241 needsHorz = (policy == java_awt_ScrollPane_SCROLLBARS_ALWAYS ||
242 (policy == java_awt_ScrollPane_SCROLLBARS_AS_NEEDED &&
243 childWidth > parentWidth));
244 if (needsHorz) {
245 parentHeight -= ::GetSystemMetrics(SM_CYHSCROLL);
246 }
247 }
248
249 /* Now set ranges -- setting the min and max the same disables them. */
250 if (needsHorz) {
251 jobject hAdj =
252 env->GetObjectField(target, AwtScrollPane::hAdjustableID);
253 env->SetIntField(hAdj, AwtScrollPane::blockIncrementID, parentWidth);
254 SetScrollInfo(SB_HORZ, childWidth - 1, parentWidth,
255 (policy == java_awt_ScrollPane_SCROLLBARS_ALWAYS));
256 env->DeleteLocalRef(hAdj);
257 } else {
258 /* Set scroll info to imitate the behaviour and since we don't
259 need to display it, explicitly don't show the bar */
260 SetScrollInfo(SB_HORZ, childWidth - 1, parentWidth,
261 (policy == java_awt_ScrollPane_SCROLLBARS_ALWAYS));
262 ::ShowScrollBar(GetHWnd(), SB_HORZ, false);
263 }
264
265 if (needsVert) {
266 jobject vAdj =
267 env->GetObjectField(target, AwtScrollPane::vAdjustableID);
268 env->SetIntField(vAdj, AwtScrollPane::blockIncrementID, parentHeight);
269 SetScrollInfo(SB_VERT, childHeight - 1, parentHeight,
270 (policy == java_awt_ScrollPane_SCROLLBARS_ALWAYS));
271 env->DeleteLocalRef(vAdj);
272 } else {
273 /* Set scroll info to imitate the behaviour and since we don't
274 need to display it, explicitly don't show the bar */
275 SetScrollInfo(SB_VERT, childHeight - 1, parentHeight,
276 (policy == java_awt_ScrollPane_SCROLLBARS_ALWAYS));
277 ::ShowScrollBar(GetHWnd(), SB_VERT, false);
278 }
279
280 env->DeleteLocalRef(target);
281 }
282
283 void AwtScrollPane::Reshape(int x, int y, int w, int h)
284 {
285 AwtComponent::Reshape(x, y, w, h);
286 }
287
288 void AwtScrollPane::Show(JNIEnv *env)
289 {
290 SetInsets(env);
291 SendMessage(WM_AWT_COMPONENT_SHOW);
292 }
293
294 void AwtScrollPane::PostScrollEvent(int orient, int scrollCode, int pos) {
295 if (scrollCode == SB_ENDSCROLL) {
296 return;
297 }
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