+
+// ----------------------------------------------------------------------------
+// MyAutoScrollingWindow
+// ----------------------------------------------------------------------------
+
+BEGIN_EVENT_TABLE(MyAutoScrollingWindow, wxScrolled<wxWindow>)
+ EVT_LEFT_DOWN(MyAutoScrollingWindow::OnMouseLeftDown)
+ EVT_LEFT_UP(MyAutoScrollingWindow::OnMouseLeftUp)
+ EVT_MOTION(MyAutoScrollingWindow::OnMouseMove)
+ EVT_MOUSE_CAPTURE_LOST(MyAutoScrollingWindow::OnMouseCaptureLost)
+ EVT_SCROLLWIN(MyAutoScrollingWindow::OnScroll)
+END_EVENT_TABLE()
+
+MyAutoScrollingWindow::MyAutoScrollingWindow(wxWindow* parent)
+ : wxScrolled<wxWindow>(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize,
+ wxVSCROLL | wxHSCROLL | wxSUNKEN_BORDER),
+ m_selStart(-1, -1),
+ m_cursor(-1, -1),
+ m_font(9, wxFONTFAMILY_TELETYPE, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL)
+{
+ wxClientDC dc(this);
+ // query dc for text size
+ dc.SetFont(m_font);
+ dc.GetTextExtent(wxString("A"), &m_fontW, &m_fontH);
+ // set up the virtual window
+ SetScrollbars(m_fontW, m_fontH, sm_lineLen, sm_lineCnt);
+}
+
+wxRect
+MyAutoScrollingWindow::DeviceCoordsToGraphicalChars(wxRect updRect) const
+{
+ wxPoint pos(updRect.GetPosition());
+ pos = DeviceCoordsToGraphicalChars(pos);
+ updRect.x = pos.x;
+ updRect.y = pos.y;
+ updRect.width /= m_fontW;
+ updRect.height /= m_fontH;
+ // the *CoordsToGraphicalChars() funcs round down to upper-left corner,
+ // so an off-by-one correction is needed
+ ++updRect.width; // kludge
+ ++updRect.height; // kludge
+ return updRect;
+}
+
+wxPoint
+MyAutoScrollingWindow::DeviceCoordsToGraphicalChars(wxPoint pos) const
+{
+ pos.x /= m_fontW;
+ pos.y /= m_fontH;
+ pos += GetViewStart();
+ return pos;
+}
+
+wxPoint
+MyAutoScrollingWindow::GraphicalCharToDeviceCoords(wxPoint pos) const
+{
+ pos -= GetViewStart();
+ pos.x *= m_fontW;
+ pos.y *= m_fontH;
+ return pos;
+}
+
+wxRect
+MyAutoScrollingWindow::LogicalCoordsToGraphicalChars(wxRect updRect) const
+{
+ wxPoint pos(updRect.GetPosition());
+ pos = LogicalCoordsToGraphicalChars(pos);
+ updRect.x = pos.x;
+ updRect.y = pos.y;
+ updRect.width /= m_fontW;
+ updRect.height /= m_fontH;
+ // the *CoordsToGraphicalChars() funcs round down to upper-left corner,
+ // so an off-by-one correction is needed
+ ++updRect.width; // kludge
+ ++updRect.height; // kludge
+ return updRect;
+}
+
+wxPoint
+MyAutoScrollingWindow::LogicalCoordsToGraphicalChars(wxPoint pos) const
+{
+ pos.x /= m_fontW;
+ pos.y /= m_fontH;
+ return pos;
+}
+
+wxPoint
+MyAutoScrollingWindow::GraphicalCharToLogicalCoords(wxPoint pos) const
+{
+ pos.x *= m_fontW;
+ pos.y *= m_fontH;
+ return pos;
+}
+
+void MyAutoScrollingWindow::MyRefresh()
+{
+ static wxPoint lastSelStart(-1, -1), lastCursor(-1, -1);
+ // refresh last selected area (to deselect previously selected text)
+ wxRect lastUpdRect(
+ GraphicalCharToDeviceCoords(lastSelStart),
+ GraphicalCharToDeviceCoords(lastCursor)
+ );
+ // off-by-one corrections, necessary because it's not possible to know
+ // when to round up until rect is normalized by lastUpdRect constructor
+ lastUpdRect.width += m_fontW; // kludge
+ lastUpdRect.height += m_fontH; // kludge
+ // refresh currently selected (to select previously unselected text)
+ wxRect updRect(
+ GraphicalCharToDeviceCoords(m_selStart),
+ GraphicalCharToDeviceCoords(m_cursor)
+ );
+ // off-by-one corrections
+ updRect.width += m_fontW; // kludge
+ updRect.height += m_fontH; // kludge
+ // find necessary refresh areas
+ int rx = lastUpdRect.x;
+ int ry = lastUpdRect.y;
+ int rw = updRect.x - lastUpdRect.x;
+ int rh = lastUpdRect.height;
+ if (rw && rh) {
+ RefreshRect(DCNormalize(rx, ry, rw, rh));
+ }
+ rx = updRect.x;
+ ry = updRect.y + updRect.height;
+ rw= updRect.width;
+ rh = (lastUpdRect.y + lastUpdRect.height) - (updRect.y + updRect.height);
+ if (rw && rh) {
+ RefreshRect(DCNormalize(rx, ry, rw, rh));
+ }
+ rx = updRect.x + updRect.width;
+ ry = lastUpdRect.y;
+ rw = (lastUpdRect.x + lastUpdRect.width) - (updRect.x + updRect.width);
+ rh = lastUpdRect.height;
+ if (rw && rh) {
+ RefreshRect(DCNormalize(rx, ry, rw, rh));
+ }
+ rx = updRect.x;
+ ry = lastUpdRect.y;
+ rw = updRect.width;
+ rh = updRect.y - lastUpdRect.y;
+ if (rw && rh) {
+ RefreshRect(DCNormalize(rx, ry, rw, rh));
+ }
+ // update last
+ lastSelStart = m_selStart;
+ lastCursor = m_cursor;
+}
+
+bool MyAutoScrollingWindow::IsSelected(int chX, int chY) const
+{
+ if (IsInside(chX, m_selStart.x, m_cursor.x)
+ && IsInside(chY, m_selStart.y, m_cursor.y)) {
+ return true;
+ }
+ return false;
+}
+
+bool MyAutoScrollingWindow::IsInside(int k, int bound1, int bound2)
+{
+ if ((k >= bound1 && k <= bound2) || (k >= bound2 && k <= bound1)) {
+ return true;
+ }
+ return false;
+}
+
+wxRect
+MyAutoScrollingWindow::DCNormalize(int x, int y, int w, int h)
+{
+ // this is needed to get rid of the graphical remnants from the selection
+ // I think it's because DrawRectangle() excludes a pixel in either direction
+ const int kludge = 1;
+ // make (x, y) the top-left corner
+ if (w < 0) {
+ w = -w + kludge;
+ x -= w;
+ } else {
+ x -= kludge;
+ w += kludge;
+ }
+ if (h < 0) {
+ h = -h + kludge;
+ y -= h;
+ } else {
+ y -= kludge;
+ h += kludge;
+ }
+ return wxRect(x, y, w, h);
+}
+
+void MyAutoScrollingWindow::OnDraw(wxDC& dc)
+{
+ dc.SetFont(m_font);
+ wxBrush normBrush(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW)
+ , wxSOLID);
+ wxBrush selBrush(wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT)
+ , wxSOLID);
+ dc.SetPen(*wxTRANSPARENT_PEN);
+ const wxString str = sm_testData;
+ size_t strLength = str.length();
+ wxString::const_iterator str_i = str.begin();
+
+ // draw the characters
+ // 1. for each update region
+ for (wxRegionIterator upd(GetUpdateRegion()); upd; ++upd) {
+ wxRect updRect = upd.GetRect();
+ wxRect updRectInGChars(DeviceCoordsToGraphicalChars(updRect));
+ // 2. for each row of chars in the update region
+ for (int chY = updRectInGChars.y
+ ; chY <= updRectInGChars.y + updRectInGChars.height; ++chY) {
+ // 3. for each character in the row
+ bool isFirstX = true;
+ for (int chX = updRectInGChars.x
+ ; chX <= updRectInGChars.x + updRectInGChars.width
+ ; ++chX) {
+ // 4. set up dc
+ if (IsSelected(chX, chY)) {
+ dc.SetBrush(selBrush);
+ dc.SetTextForeground( wxSystemSettings::GetColour
+ (wxSYS_COLOUR_HIGHLIGHTTEXT));
+ } else {
+ dc.SetBrush(normBrush);
+ dc.SetTextForeground( wxSystemSettings::GetColour
+ (wxSYS_COLOUR_WINDOWTEXT));
+ }
+ // 5. find position info
+ wxPoint charPos = GraphicalCharToLogicalCoords(wxPoint
+ (chX, chY));
+ // 6. draw!
+ dc.DrawRectangle(charPos.x, charPos.y, m_fontW, m_fontH);
+ size_t charIndex = chY * sm_lineLen + chX;
+ if (chY < sm_lineCnt &&
+ chX < sm_lineLen &&
+ charIndex < strLength)
+ {
+ if (isFirstX)
+ {
+ str_i = str.begin() + charIndex;
+ isFirstX = false;
+ }
+ dc.DrawText(*str_i, charPos.x, charPos.y);
+ ++str_i;
+ }
+ }
+ }
+ }
+}
+
+void MyAutoScrollingWindow::OnMouseLeftDown(wxMouseEvent& event)
+{
+ // initial press of mouse button sets the beginning of the selection
+ m_selStart = DeviceCoordsToGraphicalChars(event.GetPosition());
+ // set the cursor to the same position
+ m_cursor = m_selStart;
+ // draw/erase selection
+ MyRefresh();
+}
+
+void MyAutoScrollingWindow::OnMouseLeftUp(wxMouseEvent& WXUNUSED(event))
+{
+ // this test is necessary
+ if (HasCapture()) {
+ // uncapture mouse
+ ReleaseMouse();
+ }
+}
+
+void MyAutoScrollingWindow::OnMouseMove(wxMouseEvent& event)
+{
+ // if user is dragging
+ if (event.Dragging() && event.LeftIsDown()) {
+ // set the new cursor position
+ m_cursor = DeviceCoordsToGraphicalChars(event.GetPosition());
+ // draw/erase selection
+ MyRefresh();
+ // capture mouse to activate auto-scrolling
+ if (!HasCapture()) {
+ CaptureMouse();
+ }
+ }
+}
+
+void
+MyAutoScrollingWindow::OnMouseCaptureLost(wxMouseCaptureLostEvent&
+ WXUNUSED(event))
+{
+ // we only capture mouse for timed scrolling, so nothing is needed here
+ // other than making sure to not call event.Skip()
+}
+
+void MyAutoScrollingWindow::OnScroll(wxScrollWinEvent& event)
+{
+ // need to move the cursor when autoscrolling
+ // FIXME: the cursor also moves when the scrollbar arrows are clicked
+ if (HasCapture()) {
+ if (event.GetOrientation() == wxHORIZONTAL) {
+ if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP) {
+ --m_cursor.x;
+ } else if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN) {
+ ++m_cursor.x;
+ }
+ } else if (event.GetOrientation() == wxVERTICAL) {
+ if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP) {
+ --m_cursor.y;
+ } else if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN) {
+ ++m_cursor.y;
+ }
+ }
+ }
+ MyRefresh();
+ event.Skip();
+}
+
+const int MyAutoScrollingWindow::sm_lineCnt = 125;
+const int MyAutoScrollingWindow::sm_lineLen = 79;
+const char *MyAutoScrollingWindow::sm_testData =
+"162 Cult of the genius out of vanity. Because we think well of ourselves, but "
+"nonetheless never suppose ourselves capable of producing a painting like one of "
+"Raphael's or a dramatic scene like one of Shakespeare's, we convince ourselves "
+"that the capacity to do so is quite extraordinarily marvelous, a wholly "
+"uncommon accident, or, if we are still religiously inclined, a mercy from on "
+"high. Thus our vanity, our self-love, promotes the cult of the genius: for only "
+"if we think of him as being very remote from us, as a miraculum, does he not "
+"aggrieve us (even Goethe, who was without envy, called Shakespeare his star of "
+"the most distant heights [\"William! Stern der schonsten Ferne\": from Goethe's, "
+"\"Between Two Worlds\"]; in regard to which one might recall the lines: \"the "
+"stars, these we do not desire\" [from Goethe's, \"Comfort in Tears\"]). But, aside "
+"from these suggestions of our vanity, the activity of the genius seems in no "
+"way fundamentally different from the activity of the inventor of machines, the "
+"scholar of astronomy or history, the master of tactics. All these activities "
+"are explicable if one pictures to oneself people whose thinking is active in "
+"one direction, who employ everything as material, who always zealously observe "
+"their own inner life and that of others, who perceive everywhere models and "
+"incentives, who never tire of combining together the means available to them. "
+"Genius too does nothing except learn first how to lay bricks then how to build, "
+"except continually seek for material and continually form itself around it. "
+"Every activity of man is amazingly complicated, not only that of the genius: "
+"but none is a \"miracle.\" Whence, then, the belief that genius exists only in "
+"the artist, orator and philosopher? that only they have \"intuition\"? (Whereby "
+"they are supposed to possess a kind of miraculous eyeglass with which they can "
+"see directly into \"the essence of the thing\"!) It is clear that people speak of "
+"genius only where the effects of the great intellect are most pleasant to them "
+"and where they have no desire to feel envious. To call someone \"divine\" means: "
+"\"here there is no need for us to compete.\" Then, everything finished and "
+"complete is regarded with admiration, everything still becoming is undervalued. "
+"But no one can see in the work of the artist how it has become; that is its "
+"advantage, for wherever one can see the act of becoming one grows somewhat "
+"cool. The finished and perfect art of representation repulses all thinking as "
+"to how it has become; it tyrannizes as present completeness and perfection. "
+"That is why the masters of the art of representation count above all as gifted "
+"with genius and why men of science do not. In reality, this evaluation of the "
+"former and undervaluation of the latter is only a piece of childishness in the "
+"realm of reason. "
+"\n\n"
+"163 The serious workman. Do not talk about giftedness, inborn talents! One can "
+"name great men of all kinds who were very little gifted. The acquired "
+"greatness, became \"geniuses\" (as we put it), through qualities the lack of "
+"which no one who knew what they were would boast of: they all possessed that "
+"seriousness of the efficient workman which first learns to construct the parts "
+"properly before it ventures to fashion a great whole; they allowed themselves "
+"time for it, because they took more pleasure in making the little, secondary "
+"things well than in the effect of a dazzling whole. the recipe for becoming a "
+"good novelist, for example, is easy to give, but to carry it out presupposes "
+"qualities one is accustomed to overlook when one says \"I do not have enough "
+"talent.\" One has only to make a hundred or so sketches for novels, none longer "
+"than two pages but of such distinctness that every word in them is necessary; "
+"one should write down anecdotes each day until one has learned how to give them "
+"the most pregnant and effective form; one should be tireless in collecting and "
+"describing human types and characters; one should above all relate things to "
+"others and listen to others relate, keeping one's eyes and ears open for the "
+"effect produced on those present, one should travel like a landscape painter or "
+"costume designer; one should excerpt for oneself out of the individual sciences "
+"everything that will produce an artistic effect when it is well described, one "
+"should, finally, reflect on the motives of human actions, disdain no signpost "
+"to instruction about them and be a collector of these things by day and night. "
+"One should continue in this many-sided exercise some ten years: what is then "
+"created in the workshop, however, will be fit to go out into the world. What, "
+"however, do most people do? They begin, not with the parts, but with the whole. "
+"Perhaps they chance to strike a right note, excite attention and from then on "
+"strike worse and worse notes, for good, natural reasons. Sometimes, when the "
+"character and intellect needed to formulate such a life-plan are lacking, fate "
+"and need take their place and lead the future master step by step through all "
+"the stipulations of his trade. "
+"\n\n"
+"164 Peril and profit in the cult of the genius. The belief in great, superior, "
+"fruitful spirits is not necessarily, yet nonetheless is very frequently "
+"associated with that religious or semi-religious superstition that these "
+"spirits are of supra-human origin and possess certain miraculous abilities by "
+"virtue of which they acquire their knowledge by quite other means than the rest "
+"of mankind. One ascribes to them, it seems, a direct view of the nature of the "
+"world, as it were a hole in the cloak of appearance, and believes that, by "
+"virtue of this miraculous seer's vision, they are able to communicate something "
+"conclusive and decisive about man and the world without the toil and "
+"rigorousness required by science. As long as there continue to be those who "
+"believe in the miraculous in the domain of knowledge one can perhaps concede "
+"that these people themselves derive some benefit from their belief, inasmuch as "
+"through their unconditional subjection to the great spirits they create for "
+"their own spirit during its time of development the finest form of discipline "
+"and schooling. On the other hand, it is at least questionable whether the "
+"superstitious belief in genius, in its privileges and special abilities, is of "
+"benefit to the genius himself if it takes root in him. It is in any event a "
+"dangerous sign when a man is assailed by awe of himself, whether it be the "
+"celebrated Caesar's awe of Caesar or the awe of one's own genius now under "
+"consideration; when the sacrificial incense which is properly rendered only to "
+"a god penetrates the brain of the genius, so that his head begins to swim and "
+"he comes to regard himself as something supra-human. The consequences that "
+"slowly result are: the feeling of irresponsibility, of exceptional rights, the "
+"belief that he confers a favor by his mere presence, insane rage when anyone "
+"attempts even to compare him with others, let alone to rate him beneath them, "
+"or to draw attention to lapses in his work. Because he ceases to practice "
+"criticism of himself, at last one pinion after the other falls out of his "
+"plumage: that superstitious eats at the roots of his powers and perhaps even "
+"turns him into a hypocrite after his powers have fled from him. For the great "
+"spirits themselves it is therefore probably more beneficial if they acquire an "
+"insight into the nature and origin of their powers, if they grasp, that is to "
+"say, what purely human qualities have come together in them and what fortunate "
+"circumstances attended them: in the first place undiminished energy, resolute "
+"application to individual goals, great personal courage, then the good fortune "
+"to receive an upbringing which offered in the early years the finest teachers, "
+"models and methods. To be sure, when their goal is the production of the "
+"greatest possible effect, unclarity with regard to oneself and that "
+"semi-insanity superadded to it has always achieved much; for what has been "
+"admired and envied at all times has been that power in them by virtue of which "
+"they render men will-less and sweep them away into the delusion that the "
+"leaders they are following are supra-natural. Indeed, it elevates and inspires "
+"men to believe that someone is in possession of supra-natural powers: to this "
+"extent Plato was right to say [Plato: Phaedrus, 244a] that madness has brought "
+"the greatest of blessings upon mankind. In rare individual cases this portion "
+"of madness may, indeed, actually have been the means by which such a nature, "
+"excessive in all directions, was held firmly together: in the life of "
+"individuals, too, illusions that are in themselves poisons often play the role "
+"of healers; yet, in the end, in the case of every \"genius\" who believes in his "
+"own divinity the poison shows itself to the same degree as his \"genius\" grows "
+"old: one may recall, for example, the case of Napoleon, whose nature certainly "
+"grew into the mighty unity that sets him apart from all men of modern times "
+"precisely through his belief in himself and his star and through the contempt "
+"for men that flowed from it; until in the end, however, this same belief went "
+"over into an almost insane fatalism, robbed him of his acuteness and swiftness "
+"of perception, and became the cause of his destruction.";
projects / wxWidgets.git / blobdiff