294 lines
7.9 KiB
C++
294 lines
7.9 KiB
C++
#include "IMGUIControls.h"
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#include "Engine.h"
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#include "ControllerBase.h"
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#include "ViewBase.h"
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#include <GL/gl.h>
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#include "DrawingsGL.h"
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#include "keytable.h"
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Engine::ControllerBase *controller = NULL;
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Engine::ViewBase *view = NULL;
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namespace Engine {
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namespace GUI {
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/** \brief Checks whether the mouse is in the given rectangle */
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bool regionhit (int x, int y, int w, int h) {
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controller = EngineGetController();
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assert (controller);
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int mouse_pos[2];
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controller->GetMouseScreenPosition(mouse_pos);
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if (mouse_pos[0] < x ||
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mouse_pos[1] < y ||
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mouse_pos[0] >= x + w ||
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mouse_pos[1] >= y + h)
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return false;
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return true;
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}
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/** \brief Draws a label with a given caption at the position (vertically centered)
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*
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* This function draws the label at the horizontal x position and centers the
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* label with regard to the height of the rendered caption.
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*
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* \TODO [med] The vertical alignment around the center of the vertical height
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* of the string is rather unfortunate as different contents will be rendered
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* at different vertical positions (e.g. "aaa" and "ggg")
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*/
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void Label (int id, const char* caption, int x, int y) {
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if (caption != NULL) {
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float width, height;
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view = EngineGetView ();
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assert (view);
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glColor3f (1., 1., 1.);
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view->DrawGLStringMeasure(caption, &width, &height);
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view->DrawGLString(x , y + height * 0.5, caption);
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}
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}
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/** \brief Draws a button at the given position
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*
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* The area defined by the parameters defines the clickable area. However
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* decorations might be drawn on a smaller or bigger area.
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*
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* \returns true if it was clicked
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*
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*/
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bool Button (int id, const char* caption, int x, int y, int w, int h) {
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controller = EngineGetController();
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assert (controller);
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// LogMessage ("id = %d hotitem = %d activeitem = %d kbditem = %d", id, controller->uistate.hotitem, controller->uistate.activeitem, controller->uistate.kbditem);
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// Check for hotness
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if (regionhit (x, y, w, h)) {
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controller->uistate.hotitem = id;
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if (controller->uistate.activeitem == 0
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&& controller->GetButtonState(MouseButtonLeft))
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controller->uistate.activeitem = id;
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}
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// If nothing is selected
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if (controller->uistate.hotitem != 0) {
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controller->uistate.kbditem = controller->uistate.hotitem;
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}
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if (controller->uistate.kbditem == 0) {
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controller->uistate.hotitem = id;
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controller->uistate.kbditem = id;
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}
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// Render
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glColor3f (0.2, 0.2, 0.2);
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DrawRect2D (x + 4, y + 4, w, h);
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if (controller->uistate.hotitem == id
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|| controller->uistate.kbditem == id) {
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if (controller->uistate.activeitem == id) {
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glColor3f (0.8, 0.8, 0.8);
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DrawRect2D (x, y, w, h);
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} else {
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glColor3f (0.7, 0.7, 0.7);
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DrawRect2D (x, y, w, h);
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}
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} else {
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glColor3f (0.4, 0.4, 0.4);
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DrawRect2D (x, y, w, h);
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}
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// Caption
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if (caption != NULL) {
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float width, height;
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view = EngineGetView ();
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assert (view);
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glColor3f (1., 1., 1.);
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view->DrawGLStringMeasure(caption, &width, &height);
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view->DrawGLString(x + w * 0.5 - width * 0.5, y + h * 0.5 - height * 0.5, caption);
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}
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// Mouse Logic
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if (controller->GetButtonState(MouseButtonLeft) == false
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&& controller->uistate.hotitem == id
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&& controller->uistate.activeitem == id) {
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controller->uistate.lastwidget = id;
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return true;
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}
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// Keyboard Logic
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if (controller->uistate.kbditem == id) {
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// We have to make sure, that we always clear the uistate.last_keysym
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// value, otherwise the same action might be repeated over and over.
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switch (controller->uistate.last_keysym) {
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case SDLK_DOWN:
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controller->uistate.kbditem = 0;
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controller->uistate.hotitem = 0;
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controller->uistate.last_keysym = SDLK_CLEAR;
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break;
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case SDLK_UP:
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controller->uistate.kbditem = controller->uistate.lastwidget;
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controller->uistate.hotitem = controller->uistate.lastwidget;
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controller->uistate.last_keysym = SDLK_CLEAR;
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break;
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case SDLK_RETURN:
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controller->uistate.last_keysym = SDLK_CLEAR;
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// As we (probably) exit the current set of widgets, we have to clear
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// the uistate.kbditem value.
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controller->uistate.kbditem = 0;
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return true;
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break;
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}
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}
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controller->uistate.lastwidget = id;
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return false;
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}
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/** \brief An Edit widget that allows editing of a string consisting of one line
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*
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* \TODO [med] vertical alignment (especially of text) is a bit whacky
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*
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* \returns true if it was clicked
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*
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*/
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bool LineEdit (int id, int x, int y, std::string &text_value, const int &maxlength) {
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controller = EngineGetController();
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assert (controller);
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int w = maxlength * 16;
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int h = 16;
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// LogMessage ("id = %d hotitem = %d activeitem = %d kbditem = %d", id, controller->uistate.hotitem, controller->uistate.activeitem, controller->uistate.kbditem);
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// Check for hotness
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if (regionhit (x, y, w, h)) {
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controller->uistate.hotitem = id;
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if (controller->uistate.activeitem == 0
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&& controller->GetButtonState(MouseButtonLeft))
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controller->uistate.activeitem = id;
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}
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// If nothing is selected
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if (controller->uistate.hotitem != 0) {
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controller->uistate.kbditem = controller->uistate.hotitem;
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}
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if (controller->uistate.kbditem == 0) {
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controller->uistate.hotitem = id;
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controller->uistate.kbditem = id;
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}
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// Render
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glColor3f (0.2, 0.2, 0.2);
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DrawRect2D (x + 4, y + 4, w, h);
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if (controller->uistate.hotitem == id
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|| controller->uistate.kbditem == id) {
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if (controller->uistate.activeitem == id) {
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glColor3f (0.8, 0.8, 0.8);
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DrawRect2D (x, y, w, h);
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} else {
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glColor3f (0.7, 0.7, 0.7);
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DrawRect2D (x, y, w, h);
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}
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} else {
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glColor3f (0.4, 0.4, 0.4);
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DrawRect2D (x, y, w, h);
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}
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// Rendering of the current value
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float width, height;
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view = EngineGetView ();
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assert (view);
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glColor3f (1., 1., 1.);
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std::string text_output = text_value;
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if (controller->uistate.kbditem == id && SDL_GetTicks() >> 9 & 1)
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text_output += "_";
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view->DrawGLStringMeasure(text_value.c_str(), &width, &height);
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view->DrawGLString(x + 16, y + 12, text_output.c_str());
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// Keyboard Logic
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if (controller->uistate.kbditem == id) {
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switch (controller->uistate.last_keysym) {
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case SDLK_DOWN:
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controller->uistate.kbditem = 0;
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controller->uistate.hotitem = 0;
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controller->uistate.last_keysym = SDLK_CLEAR;
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break;
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case SDLK_UP:
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controller->uistate.kbditem = controller->uistate.lastwidget;
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controller->uistate.hotitem = controller->uistate.lastwidget;
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controller->uistate.last_keysym = SDLK_CLEAR;
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break;
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case SDLK_CLEAR:
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controller->uistate.last_keysym = SDLK_CLEAR;
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controller->uistate.last_unicode = 0;
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return false;
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break;
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case SDLK_ESCAPE:
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controller->uistate.last_keysym = SDLK_CLEAR;
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controller->uistate.last_unicode = 0;
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controller->uistate.hotitem = 0;
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controller->uistate.kbditem = 0;
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return false;
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break;
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case SDLK_RETURN:
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controller->uistate.last_keysym = SDLK_CLEAR;
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controller->uistate.last_unicode = 0;
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controller->uistate.hotitem = 0;
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controller->uistate.kbditem = 0;
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return true;
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break;
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case SDLK_BACKSPACE:
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if (text_value.size() > 0) {
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text_value = text_value.substr(0, text_value.size() - 1);
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controller->uistate.last_keysym = SDLK_CLEAR;
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controller->uistate.last_unicode = 0;
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return true;
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}
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break;
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default:
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// The raw input processing
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if (maxlength > 0 && text_value.size() < maxlength) {
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if (controller->uistate.last_unicode) {
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if ((controller->uistate.last_unicode & 0xFF80) == 0) {
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text_value += controller->uistate.last_unicode & 0x7F;
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controller->uistate.last_unicode = 0;
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return true;
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} else {
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LogWarning ("Input key not supported!");
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return false;
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}
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}
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}
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break;
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}
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}
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controller->uistate.lastwidget = id;
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// Mouse Logic
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if (controller->GetButtonState(MouseButtonLeft) == false
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&& controller->uistate.hotitem == id
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&& controller->uistate.activeitem == id) {
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controller->uistate.kbditem = id;
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}
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return false;
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}
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};
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};
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