Open source Star Ruler 2 source code!
This commit is contained in:
Lucas de Vries
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import elements.BaseGuiElement;
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import elements.GuiButton;
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export ScrollOrientation, GuiScrollbar;
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enum ScrollOrientation {
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SO_Vertical,
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SO_Horizontal,
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};
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class GuiScrollbar : BaseGuiElement {
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bool Focused;
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bool Dragging;
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int Orientation;
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vec2i DragFrom;
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GuiButton@ up;
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GuiButton@ down;
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SkinStyle style;
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SkinStyle handleStyle;
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double start;
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double end;
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double page;
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double scroll;
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double pos;
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double bar;
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GuiScrollbar(IGuiElement@ ParentElement, const recti& Rectangle) {
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super(ParentElement, Rectangle);
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start = 0.0;
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end = 1.0;
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page = 0.0;
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bar = 0.2;
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pos = 0.5;
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scroll = 40.0;
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Focused = false;
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Dragging = false;
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@up = GuiButton(this, recti());
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@down = GuiButton(this, recti());
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Orientation = SO_Vertical;
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updateAbsolutePosition();
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}
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void set_orientation(int orient) {
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Orientation = orient;
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if(orient == SO_Vertical) {
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up.alignment.top.set(AS_Top, 0.0, 0);
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up.alignment.left.set(AS_Left, 0.0, 0);
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up.alignment.right.set(AS_Right, 0.0, 0);
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up.alignment.bottom.set(AS_Top, 0.0, AbsolutePosition.width);
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down.alignment.top.set(AS_Bottom, 0.0, AbsolutePosition.width);
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down.alignment.left.set(AS_Left, 0.0, 0);
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down.alignment.right.set(AS_Right, 0.0, 0);
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down.alignment.bottom.set(AS_Bottom, 0.0, 0);
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up.style = SS_ScrollUp;
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down.style = SS_ScrollDown;
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style = SS_ScrollVert;
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handleStyle = SS_ScrollVertHandle;
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}
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else {
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up.alignment.top.set(AS_Top, 0.0, 0);
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up.alignment.left.set(AS_Left, 0.0, 0);
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up.alignment.right.set(AS_Left, 0.0, AbsolutePosition.height);
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up.alignment.bottom.set(AS_Bottom, 0.0, 0);
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down.alignment.top.set(AS_Top, 0.0, 0);
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down.alignment.left.set(AS_Right, 0.0, AbsolutePosition.height);
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down.alignment.right.set(AS_Right, 0.0, 0);
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down.alignment.bottom.set(AS_Bottom, 0.0, 0);
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up.style = SS_ScrollLeft;
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down.style = SS_ScrollRight;
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style = SS_ScrollHoriz;
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handleStyle = SS_ScrollHorizHandle;
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}
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up.updateAbsolutePosition();
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down.updateAbsolutePosition();
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}
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int get_orientation() {
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return Orientation;
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}
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void emitChange() {
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GuiEvent evt;
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evt.type = GUI_Changed;
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@evt.caller = this;
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onGuiEvent(evt);
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}
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bool onGuiEvent(const GuiEvent& event) {
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if(event.caller is this) {
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switch(event.type) {
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case GUI_Focused:
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Focused = true;
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break;
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case GUI_Focus_Lost:
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Focused = false;
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Dragging = false;
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break;
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}
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}
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else if(event.type == GUI_Clicked) {
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if(event.caller is up) {
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if(shiftKey)
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pos = max(start, pos - page);
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else
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pos = max(start, pos - scroll);
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emitChange();
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}
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else if(event.caller is down) {
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if(shiftKey)
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pos = min(end - page, pos + page);
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else
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pos = min(end - page, pos + scroll);
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emitChange();
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}
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}
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return BaseGuiElement::onGuiEvent(event);
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}
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bool onMouseEvent(const MouseEvent& event, IGuiElement@ source) {
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if(source is this) {
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vec2i mouse = vec2i(event.x, event.y);
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switch(event.type) {
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case MET_Button_Down: {
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recti handlePos = getBarPosition();
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vec2i offset = mouse - AbsolutePosition.topLeft;
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Dragging = true;
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DragFrom = mouse;
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if(!handlePos.isWithin(offset)) {
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pos = min(end - page, max(start, getOffsetPosition(offset)));
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emitChange();
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}
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} return true;
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case MET_Moved: {
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if(Dragging) {
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vec2i diff = mouse - DragFrom;
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if(Orientation == SO_Vertical) {
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int barSize = getBarPosition().height;
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pos += double(diff.y) * (end - start - page) / double(AbsolutePosition.height - barSize - 2 * AbsolutePosition.width);
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}
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else {
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int barSize = getBarPosition().width;
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pos += double(diff.x) * (end - start - page) / double(AbsolutePosition.width - barSize - 2 * AbsolutePosition.height);
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}
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if(pos < start)
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pos = start;
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else if(pos > end)
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pos = end;
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DragFrom = vec2i(clamp(mouse.x, AbsolutePosition.topLeft.x+size.height, AbsolutePosition.botRight.x-size.height),
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clamp(mouse.y, AbsolutePosition.topLeft.y+size.width, AbsolutePosition.botRight.y-size.width));
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emitChange();
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return true;
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}
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} break;
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case MET_Button_Up:
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if(Focused) {
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Dragging = false;
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return true;
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}
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break;
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case MET_Scrolled:
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pos = min(max(end - page, start), max(start, pos + double(-event.y) * scroll));
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emitChange();
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return true;
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}
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}
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return BaseGuiElement::onMouseEvent(event, source);
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}
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bool onKeyEvent(const KeyboardEvent& event, IGuiElement@ source) {
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switch(event.type) {
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case KET_Key_Down:
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switch(event.key) {
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case KEY_LEFT:
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case KEY_UP:
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pos = max(start, pos - scroll);
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emitChange();
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break;
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case KEY_RIGHT:
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case KEY_DOWN:
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pos = min(end - page, pos + scroll);
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emitChange();
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break;
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case KEY_PAGEUP:
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pos = max(start, pos - page);
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emitChange();
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break;
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case KEY_PAGEDOWN:
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pos = min(end - page, pos + page);
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emitChange();
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break;
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}
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break;
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}
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return BaseGuiElement::onKeyEvent(event, source);
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}
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void updateAbsolutePosition() {
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BaseGuiElement::updateAbsolutePosition();
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orientation = Orientation;
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}
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double getOffsetPosition(vec2i offset) {
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double range = end - start;
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if(range < page || range <= 0.0)
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return start;
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if(Orientation == SO_Vertical) {
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int buttonsize = AbsolutePosition.width;
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int space = AbsolutePosition.height - buttonsize * 2;
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int barsize = max(int(space * (bar / range)), 16);
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return (double(offset.y - barsize - buttonsize) / double(space - barsize)) * range + start;
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}
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else {
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int buttonsize = AbsolutePosition.height;
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int space = AbsolutePosition.width - buttonsize * 2;
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int barsize = max(int(space * (bar / range)), 16);
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return (double(offset.x - barsize - buttonsize) / double(space - barsize)) * range + start;
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}
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}
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recti getBarPosition() {
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//Initial scrollbar space
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double range = end - start;
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if(range <= page || range <= 0.0)
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return recti();
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if(Orientation == SO_Vertical) {
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int buttonsize = AbsolutePosition.width;
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int space = AbsolutePosition.height - buttonsize * 2;
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//Remove space for bar
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int barsize = max(int(space * (bar / range)), 16);
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space -= barsize;
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//Draw bar at correct position
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int barpos = ((pos - start) / (range - page)) * space;
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vec2i barcoord = vec2i(0, barpos + buttonsize);
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return recti(barcoord, barcoord + vec2i(AbsolutePosition.width, barsize));
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}
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else {
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int buttonsize = AbsolutePosition.height;
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int space = AbsolutePosition.width - buttonsize * 2;
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//Remove space for bar
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int barsize = max(int(space * (bar / range)), 16);
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space -= barsize;
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//Draw bar at correct position
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int barpos = ((pos - start) / (range - page)) * space;
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vec2i barcoord = vec2i(barpos + buttonsize, 0);
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return recti(barcoord, barcoord + vec2i(barsize, AbsolutePosition.height));
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}
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}
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void draw() {
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recti barPos = getBarPosition() + AbsolutePosition.topLeft;
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recti bgPos;
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bool enabled = (end - start > page);
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uint handleFlags = SF_Normal;
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uint flags = SF_Normal;
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if(!enabled)
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flags |= SF_Disabled;
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if(Dragging)
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handleFlags |= SF_Active;
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if(barPos.isWithin(mousePos))
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handleFlags |= SF_Hovered;
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if(Orientation == SO_Vertical) {
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bgPos = recti(AbsolutePosition.topLeft + vec2i(0, AbsolutePosition.width),
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AbsolutePosition.botRight - vec2i(0, AbsolutePosition.width));
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}
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else {
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bgPos = recti(AbsolutePosition.topLeft + vec2i(AbsolutePosition.height, 0),
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AbsolutePosition.botRight - vec2i(AbsolutePosition.height, 0));
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}
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skin.draw(style, flags, bgPos);
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if(enabled)
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skin.draw(handleStyle, handleFlags, barPos);
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up.disabled = !enabled;
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down.disabled = !enabled;
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BaseGuiElement::draw();
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}
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};
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